Note: Please specifiy the ratio at check out. See the Andymark site for ratio details.

 

The EVO Shifter is our next EVOlution of a shifting transmission gearbox. It's design was developed from the lessons learned during our experience using the AM Shifter since 2004, the Super Shifter since 2007 and the Sonic Shifter since 2013.

This transmission is a two-speed, shift-on-the-fly gearbox, using an improved 4-tooth dog shifting method. Motor input can be two or three CIM motors (or AM Planetary Gearboxes). The transmission can be configured with two or three interior stages, and a selection of various 1/2 inch output shafts. Plates are designed for mounting either two or three CIM motors. No servo shifting is available with this shifter. This transmission is shipped assembled, but without the CIM motors installed, even if the CIM motors are ordered with the gearbox. 

Improvements: 
Fourteen significant improvements, not seen in previous AndyMark shifters, have been implemented in the EVO Shifter.

The dog gear now has 4 dogs on each face. This allows more material around the dog gear screw, increasing strength over previous designs.

1. A robust 1/8" diameter shoulder screw replaces the previously used #4-40 screw.
2. The dog gear material is AMPCO® 18 Bronze. This material has similar properties to stainless steel (previously used), but has added lubricity for smooth shifting.
3. A new, super-strong shift block assembly with a larger bearing and steel housing (and threads!) is now included.
4. The input stage uses 32 DP gears and a press-fit 15 tooth CIM gear. This allows for an 85:15 first stage reduction.
5. This gearbox allows users to independently pick their high and low ratios, and are no longer confined to two set spreads.
6. The user can swap the ratios (A to B, B to A) as needed.
7. More encoder options are available, including the US Digital E4T (standard) and the CTRE SRXmag encoder (sold separately).
8. Aggressive weight reduction features have been machined into the gears and plates.
9. All of the cluster gears have the same features surrounding the bore on both sides. This allows the user to dis-assemble and assemble the shifter without worry of correct gear orientation.
10. Users can pick two or three stages for their transmission. An optional 3rd stage provides an additional C ratio choice of 1:1.14 or 2:1.
11. CIM Motors (2 or 3) can be ordered with the transmission. If these are configured with the product, then they will be shipped with the CIM gear installed on the motor shaft.
12. Using existing mounting plate holes, it can be mounted to an AM14U family chassis or a 2"x1" box tube frame.
13. A short, narrow air cylinder is being used, taking up less length compared to previously used cylinders.

Air Cylinder Shifting:
The EVO Shifter only uses a pneumatic shift method.

• A spring-extended PHD pneumatic cylinder (am-3494), powers the shift. This pneumatic shift can be done while a robot is accelerating, pushing or decelerating.
  • Extend Stroke (spring extend only): 4lbs
  • Extrend Stroke (if air actuated, 40PSI): 21.6 lbs
  • Retract Stroke (air actuated, 40PSI): 15.7lbs
• This cylinder extends into the selected "Ratio A" when no air pressure is supplied. This allows a robot to continue to drive using Ratio A if air pressure is lost.

Weight Range (Without Motors): 
Two Stage: 2.9 - 3.2 Pounds
Three Stage: 3.3 - 3.5 Pounds

Note about CIMs:
The EVO Shifter utilizes a 15 Tooth 32DP gear as the CIM gear which requires a press fit. Due to the intended interference fit (0.001 - 0.002") along the 0.750" long gear, a minimum 3 ton arbor press is required to install this gear onto the motor in conjunction with a provided aluminum spacer to help set the distance of which the pinion should be installed from the end of the motor shaft (approximately 0.40"). If you do not have access to this size arbor press, we have the option to add CIM motors to your order with the pinion gears pre-installed, available as am-0255_15T. 

Usage, Greasing and Break-in: 
All AndyMark gearboxes require grease for proper operation and long life. Use our Red Tacky Grease, 14.2 gram (am-2768). However, before applying grease, it is helpful to run the gearbox for 30 minutes without grease to allow the gear teeth to wear in. While we do design with short run times in mind, this 'break in' period for smooth gearbox operation is recommended. Once this is completed, apply grease to the spur gears periodically to ensure smooth operation. No grease is needed on the AMPCO® bronze dog gear.

Note: Please specifiy the ratio at check out. See the Andymark site for ratio details.

 

The EVO Shifter is our next EVOlution of a shifting transmission gearbox. It's design was developed from the lessons learned during our experience using the AM Shifter since 2004, the Super Shifter since 2007 and the Sonic Shifter since 2013.

This transmission is a two-speed, shift-on-the-fly gearbox, using an improved 4-tooth dog shifting method. Motor input can be two or three CIM motors (or AM Planetary Gearboxes). The transmission can be configured with two or three interior stages, and a selection of various 1/2 inch output shafts. Plates are designed for mounting either two or three CIM motors. No servo shifting is available with this shifter. This transmission is shipped assembled, but without the CIM motors installed, even if the CIM motors are ordered with the gearbox. 

Improvements: 
Fourteen significant improvements, not seen in previous AndyMark shifters, have been implemented in the EVO Shifter.

The dog gear now has 4 dogs on each face. This allows more material around the dog gear screw, increasing strength over previous designs.

1. A robust 1/8" diameter shoulder screw replaces the previously used #4-40 screw.
2. The dog gear material is AMPCO® 18 Bronze. This material has similar properties to stainless steel (previously used), but has added lubricity for smooth shifting.
3. A new, super-strong shift block assembly with a larger bearing and steel housing (and threads!) is now included.
4. The input stage uses 32 DP gears and a press-fit 15 tooth CIM gear. This allows for an 85:15 first stage reduction.
5. This gearbox allows users to independently pick their high and low ratios, and are no longer confined to two set spreads.
6. The user can swap the ratios (A to B, B to A) as needed.
7. More encoder options are available, including the US Digital E4T (standard) and the CTRE SRXmag encoder (sold separately).
8. Aggressive weight reduction features have been machined into the gears and plates.
9. All of the cluster gears have the same features surrounding the bore on both sides. This allows the user to dis-assemble and assemble the shifter without worry of correct gear orientation.
10. Users can pick two or three stages for their transmission. An optional 3rd stage provides an additional C ratio choice of 1:1.14 or 2:1.
11. CIM Motors (2 or 3) can be ordered with the transmission. If these are configured with the product, then they will be shipped with the CIM gear installed on the motor shaft.
12. Using existing mounting plate holes, it can be mounted to an AM14U family chassis or a 2"x1" box tube frame.
13. A short, narrow air cylinder is being used, taking up less length compared to previously used cylinders.

Air Cylinder Shifting:
The EVO Shifter only uses a pneumatic shift method.

• A spring-extended PHD pneumatic cylinder (am-3494), powers the shift. This pneumatic shift can be done while a robot is accelerating, pushing or decelerating.
  • Extend Stroke (spring extend only): 4lbs
  • Extrend Stroke (if air actuated, 40PSI): 21.6 lbs
  • Retract Stroke (air actuated, 40PSI): 15.7lbs
• This cylinder extends into the selected "Ratio A" when no air pressure is supplied. This allows a robot to continue to drive using Ratio A if air pressure is lost.

Weight Range (Without Motors): 
Two Stage: 2.9 - 3.2 Pounds
Three Stage: 3.3 - 3.5 Pounds

Note about CIMs:
The EVO Shifter utilizes a 15 Tooth 32DP gear as the CIM gear which requires a press fit. Due to the intended interference fit (0.001 - 0.002") along the 0.750" long gear, a minimum 3 ton arbor press is required to install this gear onto the motor in conjunction with a provided aluminum spacer to help set the distance of which the pinion should be installed from the end of the motor shaft (approximately 0.40"). If you do not have access to this size arbor press, we have the option to add CIM motors to your order with the pinion gears pre-installed, available as am-0255_15T. 

Usage, Greasing and Break-in: 
All AndyMark gearboxes require grease for proper operation and long life. Use our Red Tacky Grease, 14.2 gram (am-2768). However, before applying grease, it is helpful to run the gearbox for 30 minutes without grease to allow the gear teeth to wear in. While we do design with short run times in mind, this 'break in' period for smooth gearbox operation is recommended. Once this is completed, apply grease to the spur gears periodically to ensure smooth operation. No grease is needed on the AMPCO® bronze dog gear.

Note: Please specifiy the ratio at check out. See the Andymark site for ratio details.

 

The EVO Shifter is our next EVOlution of a shifting transmission gearbox. It's design was developed from the lessons learned during our experience using the AM Shifter since 2004, the Super Shifter since 2007 and the Sonic Shifter since 2013.

This transmission is a two-speed, shift-on-the-fly gearbox, using an improved 4-tooth dog shifting method. Motor input can be two or three CIM motors (or AM Planetary Gearboxes). The transmission can be configured with two or three interior stages, and a selection of various 1/2 inch output shafts. Plates are designed for mounting either two or three CIM motors. No servo shifting is available with this shifter. This transmission is shipped assembled, but without the CIM motors installed, even if the CIM motors are ordered with the gearbox. 

Improvements: 
Fourteen significant improvements, not seen in previous AndyMark shifters, have been implemented in the EVO Shifter.

The dog gear now has 4 dogs on each face. This allows more material around the dog gear screw, increasing strength over previous designs.

1. A robust 1/8" diameter shoulder screw replaces the previously used #4-40 screw.
2. The dog gear material is AMPCO® 18 Bronze. This material has similar properties to stainless steel (previously used), but has added lubricity for smooth shifting.
3. A new, super-strong shift block assembly with a larger bearing and steel housing (and threads!) is now included.
4. The input stage uses 32 DP gears and a press-fit 15 tooth CIM gear. This allows for an 85:15 first stage reduction.
5. This gearbox allows users to independently pick their high and low ratios, and are no longer confined to two set spreads.
6. The user can swap the ratios (A to B, B to A) as needed.
7. More encoder options are available, including the US Digital E4T (standard) and the CTRE SRXmag encoder (sold separately).
8. Aggressive weight reduction features have been machined into the gears and plates.
9. All of the cluster gears have the same features surrounding the bore on both sides. This allows the user to dis-assemble and assemble the shifter without worry of correct gear orientation.
10. Users can pick two or three stages for their transmission. An optional 3rd stage provides an additional C ratio choice of 1:1.14 or 2:1.
11. CIM Motors (2 or 3) can be ordered with the transmission. If these are configured with the product, then they will be shipped with the CIM gear installed on the motor shaft.
12. Using existing mounting plate holes, it can be mounted to an AM14U family chassis or a 2"x1" box tube frame.
13. A short, narrow air cylinder is being used, taking up less length compared to previously used cylinders.

Air Cylinder Shifting:
The EVO Shifter only uses a pneumatic shift method.

• A spring-extended PHD pneumatic cylinder (am-3494), powers the shift. This pneumatic shift can be done while a robot is accelerating, pushing or decelerating.
  • Extend Stroke (spring extend only): 4lbs
  • Extrend Stroke (if air actuated, 40PSI): 21.6 lbs
  • Retract Stroke (air actuated, 40PSI): 15.7lbs
• This cylinder extends into the selected "Ratio A" when no air pressure is supplied. This allows a robot to continue to drive using Ratio A if air pressure is lost.

Weight Range (Without Motors): 
Two Stage: 2.9 - 3.2 Pounds
Three Stage: 3.3 - 3.5 Pounds

Note about CIMs:
The EVO Shifter utilizes a 15 Tooth 32DP gear as the CIM gear which requires a press fit. Due to the intended interference fit (0.001 - 0.002") along the 0.750" long gear, a minimum 3 ton arbor press is required to install this gear onto the motor in conjunction with a provided aluminum spacer to help set the distance of which the pinion should be installed from the end of the motor shaft (approximately 0.40"). If you do not have access to this size arbor press, we have the option to add CIM motors to your order with the pinion gears pre-installed, available as am-0255_15T. 

Usage, Greasing and Break-in: 
All AndyMark gearboxes require grease for proper operation and long life. Use our Red Tacky Grease, 14.2 gram (am-2768). However, before applying grease, it is helpful to run the gearbox for 30 minutes without grease to allow the gear teeth to wear in. While we do design with short run times in mind, this 'break in' period for smooth gearbox operation is recommended. Once this is completed, apply grease to the spur gears periodically to ensure smooth operation. No grease is needed on the AMPCO® bronze dog gear.

Note: Please specifiy the ratio at check out. See the Andymark site for ratio details.

 

The EVO Shifter is our next EVOlution of a shifting transmission gearbox. It's design was developed from the lessons learned during our experience using the AM Shifter since 2004, the Super Shifter since 2007 and the Sonic Shifter since 2013.

This transmission is a two-speed, shift-on-the-fly gearbox, using an improved 4-tooth dog shifting method. Motor input can be two or three CIM motors (or AM Planetary Gearboxes). The transmission can be configured with two or three interior stages, and a selection of various 1/2 inch output shafts. Plates are designed for mounting either two or three CIM motors. No servo shifting is available with this shifter. This transmission is shipped assembled, but without the CIM motors installed, even if the CIM motors are ordered with the gearbox. 

Improvements: 
Fourteen significant improvements, not seen in previous AndyMark shifters, have been implemented in the EVO Shifter.

The dog gear now has 4 dogs on each face. This allows more material around the dog gear screw, increasing strength over previous designs.

1. A robust 1/8" diameter shoulder screw replaces the previously used #4-40 screw.
2. The dog gear material is AMPCO® 18 Bronze. This material has similar properties to stainless steel (previously used), but has added lubricity for smooth shifting.
3. A new, super-strong shift block assembly with a larger bearing and steel housing (and threads!) is now included.
4. The input stage uses 32 DP gears and a press-fit 15 tooth CIM gear. This allows for an 85:15 first stage reduction.
5. This gearbox allows users to independently pick their high and low ratios, and are no longer confined to two set spreads.
6. The user can swap the ratios (A to B, B to A) as needed.
7. More encoder options are available, including the US Digital E4T (standard) and the CTRE SRXmag encoder (sold separately).
8. Aggressive weight reduction features have been machined into the gears and plates.
9. All of the cluster gears have the same features surrounding the bore on both sides. This allows the user to dis-assemble and assemble the shifter without worry of correct gear orientation.
10. Users can pick two or three stages for their transmission. An optional 3rd stage provides an additional C ratio choice of 1:1.14 or 2:1.
11. CIM Motors (2 or 3) can be ordered with the transmission. If these are configured with the product, then they will be shipped with the CIM gear installed on the motor shaft.
12. Using existing mounting plate holes, it can be mounted to an AM14U family chassis or a 2"x1" box tube frame.
13. A short, narrow air cylinder is being used, taking up less length compared to previously used cylinders.

Air Cylinder Shifting:
The EVO Shifter only uses a pneumatic shift method.

• A spring-extended PHD pneumatic cylinder (am-3494), powers the shift. This pneumatic shift can be done while a robot is accelerating, pushing or decelerating.
  • Extend Stroke (spring extend only): 4lbs
  • Extrend Stroke (if air actuated, 40PSI): 21.6 lbs
  • Retract Stroke (air actuated, 40PSI): 15.7lbs
• This cylinder extends into the selected "Ratio A" when no air pressure is supplied. This allows a robot to continue to drive using Ratio A if air pressure is lost.

Weight Range (Without Motors): 
Two Stage: 2.9 - 3.2 Pounds
Three Stage: 3.3 - 3.5 Pounds

Note about CIMs:
The EVO Shifter utilizes a 15 Tooth 32DP gear as the CIM gear which requires a press fit. Due to the intended interference fit (0.001 - 0.002") along the 0.750" long gear, a minimum 3 ton arbor press is required to install this gear onto the motor in conjunction with a provided aluminum spacer to help set the distance of which the pinion should be installed from the end of the motor shaft (approximately 0.40"). If you do not have access to this size arbor press, we have the option to add CIM motors to your order with the pinion gears pre-installed, available as am-0255_15T. 

Usage, Greasing and Break-in: 
All AndyMark gearboxes require grease for proper operation and long life. Use our Red Tacky Grease, 14.2 gram (am-2768). However, before applying grease, it is helpful to run the gearbox for 30 minutes without grease to allow the gear teeth to wear in. While we do design with short run times in mind, this 'break in' period for smooth gearbox operation is recommended. Once this is completed, apply grease to the spur gears periodically to ensure smooth operation. No grease is needed on the AMPCO® bronze dog gear.

Note: Please specifiy the ratio at check out. See the Andymark site for ratio details.

 

The EVO Shifter is our next EVOlution of a shifting transmission gearbox. It's design was developed from the lessons learned during our experience using the AM Shifter since 2004, the Super Shifter since 2007 and the Sonic Shifter since 2013.

This transmission is a two-speed, shift-on-the-fly gearbox, using an improved 4-tooth dog shifting method. Motor input can be two or three CIM motors (or AM Planetary Gearboxes). The transmission can be configured with two or three interior stages, and a selection of various 1/2 inch output shafts. Plates are designed for mounting either two or three CIM motors. No servo shifting is available with this shifter. This transmission is shipped assembled, but without the CIM motors installed, even if the CIM motors are ordered with the gearbox. 

Improvements: 
Fourteen significant improvements, not seen in previous AndyMark shifters, have been implemented in the EVO Shifter.

The dog gear now has 4 dogs on each face. This allows more material around the dog gear screw, increasing strength over previous designs.

1. A robust 1/8" diameter shoulder screw replaces the previously used #4-40 screw.
2. The dog gear material is AMPCO® 18 Bronze. This material has similar properties to stainless steel (previously used), but has added lubricity for smooth shifting.
3. A new, super-strong shift block assembly with a larger bearing and steel housing (and threads!) is now included.
4. The input stage uses 32 DP gears and a press-fit 15 tooth CIM gear. This allows for an 85:15 first stage reduction.
5. This gearbox allows users to independently pick their high and low ratios, and are no longer confined to two set spreads.
6. The user can swap the ratios (A to B, B to A) as needed.
7. More encoder options are available, including the US Digital E4T (standard) and the CTRE SRXmag encoder (sold separately).
8. Aggressive weight reduction features have been machined into the gears and plates.
9. All of the cluster gears have the same features surrounding the bore on both sides. This allows the user to dis-assemble and assemble the shifter without worry of correct gear orientation.
10. Users can pick two or three stages for their transmission. An optional 3rd stage provides an additional C ratio choice of 1:1.14 or 2:1.
11. CIM Motors (2 or 3) can be ordered with the transmission. If these are configured with the product, then they will be shipped with the CIM gear installed on the motor shaft.
12. Using existing mounting plate holes, it can be mounted to an AM14U family chassis or a 2"x1" box tube frame.
13. A short, narrow air cylinder is being used, taking up less length compared to previously used cylinders.

Air Cylinder Shifting:
The EVO Shifter only uses a pneumatic shift method.

• A spring-extended PHD pneumatic cylinder (am-3494), powers the shift. This pneumatic shift can be done while a robot is accelerating, pushing or decelerating.
  • Extend Stroke (spring extend only): 4lbs
  • Extrend Stroke (if air actuated, 40PSI): 21.6 lbs
  • Retract Stroke (air actuated, 40PSI): 15.7lbs
• This cylinder extends into the selected "Ratio A" when no air pressure is supplied. This allows a robot to continue to drive using Ratio A if air pressure is lost.

Weight Range (Without Motors): 
Two Stage: 2.9 - 3.2 Pounds
Three Stage: 3.3 - 3.5 Pounds

Note about CIMs:
The EVO Shifter utilizes a 15 Tooth 32DP gear as the CIM gear which requires a press fit. Due to the intended interference fit (0.001 - 0.002") along the 0.750" long gear, a minimum 3 ton arbor press is required to install this gear onto the motor in conjunction with a provided aluminum spacer to help set the distance of which the pinion should be installed from the end of the motor shaft (approximately 0.40"). If you do not have access to this size arbor press, we have the option to add CIM motors to your order with the pinion gears pre-installed, available as am-0255_15T. 

Usage, Greasing and Break-in: 
All AndyMark gearboxes require grease for proper operation and long life. Use our Red Tacky Grease, 14.2 gram (am-2768). However, before applying grease, it is helpful to run the gearbox for 30 minutes without grease to allow the gear teeth to wear in. While we do design with short run times in mind, this 'break in' period for smooth gearbox operation is recommended. Once this is completed, apply grease to the spur gears periodically to ensure smooth operation. No grease is needed on the AMPCO® bronze dog gear.

Note: Please specifiy the ratio at check out. See the Andymark site for ratio details.

 

The EVO Shifter is our next EVOlution of a shifting transmission gearbox. It's design was developed from the lessons learned during our experience using the AM Shifter since 2004, the Super Shifter since 2007 and the Sonic Shifter since 2013.

This transmission is a two-speed, shift-on-the-fly gearbox, using an improved 4-tooth dog shifting method. Motor input can be two or three CIM motors (or AM Planetary Gearboxes). The transmission can be configured with two or three interior stages, and a selection of various 1/2 inch output shafts. Plates are designed for mounting either two or three CIM motors. No servo shifting is available with this shifter. This transmission is shipped assembled, but without the CIM motors installed, even if the CIM motors are ordered with the gearbox. 

Improvements: 
Fourteen significant improvements, not seen in previous AndyMark shifters, have been implemented in the EVO Shifter.

The dog gear now has 4 dogs on each face. This allows more material around the dog gear screw, increasing strength over previous designs.

1. A robust 1/8" diameter shoulder screw replaces the previously used #4-40 screw.
2. The dog gear material is AMPCO® 18 Bronze. This material has similar properties to stainless steel (previously used), but has added lubricity for smooth shifting.
3. A new, super-strong shift block assembly with a larger bearing and steel housing (and threads!) is now included.
4. The input stage uses 32 DP gears and a press-fit 15 tooth CIM gear. This allows for an 85:15 first stage reduction.
5. This gearbox allows users to independently pick their high and low ratios, and are no longer confined to two set spreads.
6. The user can swap the ratios (A to B, B to A) as needed.
7. More encoder options are available, including the US Digital E4T (standard) and the CTRE SRXmag encoder (sold separately).
8. Aggressive weight reduction features have been machined into the gears and plates.
9. All of the cluster gears have the same features surrounding the bore on both sides. This allows the user to dis-assemble and assemble the shifter without worry of correct gear orientation.
10. Users can pick two or three stages for their transmission. An optional 3rd stage provides an additional C ratio choice of 1:1.14 or 2:1.
11. CIM Motors (2 or 3) can be ordered with the transmission. If these are configured with the product, then they will be shipped with the CIM gear installed on the motor shaft.
12. Using existing mounting plate holes, it can be mounted to an AM14U family chassis or a 2"x1" box tube frame.
13. A short, narrow air cylinder is being used, taking up less length compared to previously used cylinders.

Air Cylinder Shifting:
The EVO Shifter only uses a pneumatic shift method.

• A spring-extended PHD pneumatic cylinder (am-3494), powers the shift. This pneumatic shift can be done while a robot is accelerating, pushing or decelerating.
  • Extend Stroke (spring extend only): 4lbs
  • Extrend Stroke (if air actuated, 40PSI): 21.6 lbs
  • Retract Stroke (air actuated, 40PSI): 15.7lbs
• This cylinder extends into the selected "Ratio A" when no air pressure is supplied. This allows a robot to continue to drive using Ratio A if air pressure is lost.

Weight Range (Without Motors): 
Two Stage: 2.9 - 3.2 Pounds
Three Stage: 3.3 - 3.5 Pounds

Note about CIMs:
The EVO Shifter utilizes a 15 Tooth 32DP gear as the CIM gear which requires a press fit. Due to the intended interference fit (0.001 - 0.002") along the 0.750" long gear, a minimum 3 ton arbor press is required to install this gear onto the motor in conjunction with a provided aluminum spacer to help set the distance of which the pinion should be installed from the end of the motor shaft (approximately 0.40"). If you do not have access to this size arbor press, we have the option to add CIM motors to your order with the pinion gears pre-installed, available as am-0255_15T. 

Usage, Greasing and Break-in: 
All AndyMark gearboxes require grease for proper operation and long life. Use our Red Tacky Grease, 14.2 gram (am-2768). However, before applying grease, it is helpful to run the gearbox for 30 minutes without grease to allow the gear teeth to wear in. While we do design with short run times in mind, this 'break in' period for smooth gearbox operation is recommended. Once this is completed, apply grease to the spur gears periodically to ensure smooth operation. No grease is needed on the AMPCO® bronze dog gear.

Note: Please specifiy the ratio at check out. See the Andymark site for ratio details.

 

The EVO Shifter is our next EVOlution of a shifting transmission gearbox. It's design was developed from the lessons learned during our experience using the AM Shifter since 2004, the Super Shifter since 2007 and the Sonic Shifter since 2013.

This transmission is a two-speed, shift-on-the-fly gearbox, using an improved 4-tooth dog shifting method. Motor input can be two or three CIM motors (or AM Planetary Gearboxes). The transmission can be configured with two or three interior stages, and a selection of various 1/2 inch output shafts. Plates are designed for mounting either two or three CIM motors. No servo shifting is available with this shifter. This transmission is shipped assembled, but without the CIM motors installed, even if the CIM motors are ordered with the gearbox. 

Improvements: 
Fourteen significant improvements, not seen in previous AndyMark shifters, have been implemented in the EVO Shifter.

The dog gear now has 4 dogs on each face. This allows more material around the dog gear screw, increasing strength over previous designs.

1. A robust 1/8" diameter shoulder screw replaces the previously used #4-40 screw.
2. The dog gear material is AMPCO® 18 Bronze. This material has similar properties to stainless steel (previously used), but has added lubricity for smooth shifting.
3. A new, super-strong shift block assembly with a larger bearing and steel housing (and threads!) is now included.
4. The input stage uses 32 DP gears and a press-fit 15 tooth CIM gear. This allows for an 85:15 first stage reduction.
5. This gearbox allows users to independently pick their high and low ratios, and are no longer confined to two set spreads.
6. The user can swap the ratios (A to B, B to A) as needed.
7. More encoder options are available, including the US Digital E4T (standard) and the CTRE SRXmag encoder (sold separately).
8. Aggressive weight reduction features have been machined into the gears and plates.
9. All of the cluster gears have the same features surrounding the bore on both sides. This allows the user to dis-assemble and assemble the shifter without worry of correct gear orientation.
10. Users can pick two or three stages for their transmission. An optional 3rd stage provides an additional C ratio choice of 1:1.14 or 2:1.
11. CIM Motors (2 or 3) can be ordered with the transmission. If these are configured with the product, then they will be shipped with the CIM gear installed on the motor shaft.
12. Using existing mounting plate holes, it can be mounted to an AM14U family chassis or a 2"x1" box tube frame.
13. A short, narrow air cylinder is being used, taking up less length compared to previously used cylinders.

Air Cylinder Shifting:
The EVO Shifter only uses a pneumatic shift method.

• A spring-extended PHD pneumatic cylinder (am-3494), powers the shift. This pneumatic shift can be done while a robot is accelerating, pushing or decelerating.
  • Extend Stroke (spring extend only): 4lbs
  • Extrend Stroke (if air actuated, 40PSI): 21.6 lbs
  • Retract Stroke (air actuated, 40PSI): 15.7lbs
• This cylinder extends into the selected "Ratio A" when no air pressure is supplied. This allows a robot to continue to drive using Ratio A if air pressure is lost.

Weight Range (Without Motors): 
Two Stage: 2.9 - 3.2 Pounds
Three Stage: 3.3 - 3.5 Pounds

Note about CIMs:
The EVO Shifter utilizes a 15 Tooth 32DP gear as the CIM gear which requires a press fit. Due to the intended interference fit (0.001 - 0.002") along the 0.750" long gear, a minimum 3 ton arbor press is required to install this gear onto the motor in conjunction with a provided aluminum spacer to help set the distance of which the pinion should be installed from the end of the motor shaft (approximately 0.40"). If you do not have access to this size arbor press, we have the option to add CIM motors to your order with the pinion gears pre-installed, available as am-0255_15T. 

Usage, Greasing and Break-in: 
All AndyMark gearboxes require grease for proper operation and long life. Use our Red Tacky Grease, 14.2 gram (am-2768). However, before applying grease, it is helpful to run the gearbox for 30 minutes without grease to allow the gear teeth to wear in. While we do design with short run times in mind, this 'break in' period for smooth gearbox operation is recommended. Once this is completed, apply grease to the spur gears periodically to ensure smooth operation. No grease is needed on the AMPCO® bronze dog gear.

Note: Please specifiy the ratio at check out. See the Andymark site for ratio details.

 

The EVO Shifter is our next EVOlution of a shifting transmission gearbox. It's design was developed from the lessons learned during our experience using the AM Shifter since 2004, the Super Shifter since 2007 and the Sonic Shifter since 2013.

This transmission is a two-speed, shift-on-the-fly gearbox, using an improved 4-tooth dog shifting method. Motor input can be two or three CIM motors (or AM Planetary Gearboxes). The transmission can be configured with two or three interior stages, and a selection of various 1/2 inch output shafts. Plates are designed for mounting either two or three CIM motors. No servo shifting is available with this shifter. This transmission is shipped assembled, but without the CIM motors installed, even if the CIM motors are ordered with the gearbox. 

Improvements: 
Fourteen significant improvements, not seen in previous AndyMark shifters, have been implemented in the EVO Shifter.

The dog gear now has 4 dogs on each face. This allows more material around the dog gear screw, increasing strength over previous designs.

1. A robust 1/8" diameter shoulder screw replaces the previously used #4-40 screw.
2. The dog gear material is AMPCO® 18 Bronze. This material has similar properties to stainless steel (previously used), but has added lubricity for smooth shifting.
3. A new, super-strong shift block assembly with a larger bearing and steel housing (and threads!) is now included.
4. The input stage uses 32 DP gears and a press-fit 15 tooth CIM gear. This allows for an 85:15 first stage reduction.
5. This gearbox allows users to independently pick their high and low ratios, and are no longer confined to two set spreads.
6. The user can swap the ratios (A to B, B to A) as needed.
7. More encoder options are available, including the US Digital E4T (standard) and the CTRE SRXmag encoder (sold separately).
8. Aggressive weight reduction features have been machined into the gears and plates.
9. All of the cluster gears have the same features surrounding the bore on both sides. This allows the user to dis-assemble and assemble the shifter without worry of correct gear orientation.
10. Users can pick two or three stages for their transmission. An optional 3rd stage provides an additional C ratio choice of 1:1.14 or 2:1.
11. CIM Motors (2 or 3) can be ordered with the transmission. If these are configured with the product, then they will be shipped with the CIM gear installed on the motor shaft.
12. Using existing mounting plate holes, it can be mounted to an AM14U family chassis or a 2"x1" box tube frame.
13. A short, narrow air cylinder is being used, taking up less length compared to previously used cylinders.

Air Cylinder Shifting:
The EVO Shifter only uses a pneumatic shift method.

• A spring-extended PHD pneumatic cylinder (am-3494), powers the shift. This pneumatic shift can be done while a robot is accelerating, pushing or decelerating.
  • Extend Stroke (spring extend only): 4lbs
  • Extrend Stroke (if air actuated, 40PSI): 21.6 lbs
  • Retract Stroke (air actuated, 40PSI): 15.7lbs
• This cylinder extends into the selected "Ratio A" when no air pressure is supplied. This allows a robot to continue to drive using Ratio A if air pressure is lost.

Weight Range (Without Motors): 
Two Stage: 2.9 - 3.2 Pounds
Three Stage: 3.3 - 3.5 Pounds

Note about CIMs:
The EVO Shifter utilizes a 15 Tooth 32DP gear as the CIM gear which requires a press fit. Due to the intended interference fit (0.001 - 0.002") along the 0.750" long gear, a minimum 3 ton arbor press is required to install this gear onto the motor in conjunction with a provided aluminum spacer to help set the distance of which the pinion should be installed from the end of the motor shaft (approximately 0.40"). If you do not have access to this size arbor press, we have the option to add CIM motors to your order with the pinion gears pre-installed, available as am-0255_15T. 

Usage, Greasing and Break-in: 
All AndyMark gearboxes require grease for proper operation and long life. Use our Red Tacky Grease, 14.2 gram (am-2768). However, before applying grease, it is helpful to run the gearbox for 30 minutes without grease to allow the gear teeth to wear in. While we do design with short run times in mind, this 'break in' period for smooth gearbox operation is recommended. Once this is completed, apply grease to the spur gears periodically to ensure smooth operation. No grease is needed on the AMPCO® bronze dog gear.

Note: Please specifiy the ratio at check out. See the Andymark site for ratio details.

 

The EVO Shifter is our next EVOlution of a shifting transmission gearbox. It's design was developed from the lessons learned during our experience using the AM Shifter since 2004, the Super Shifter since 2007 and the Sonic Shifter since 2013.

This transmission is a two-speed, shift-on-the-fly gearbox, using an improved 4-tooth dog shifting method. Motor input can be two or three CIM motors (or AM Planetary Gearboxes). The transmission can be configured with two or three interior stages, and a selection of various 1/2 inch output shafts. Plates are designed for mounting either two or three CIM motors. No servo shifting is available with this shifter. This transmission is shipped assembled, but without the CIM motors installed, even if the CIM motors are ordered with the gearbox. 

Improvements: 
Fourteen significant improvements, not seen in previous AndyMark shifters, have been implemented in the EVO Shifter.

The dog gear now has 4 dogs on each face. This allows more material around the dog gear screw, increasing strength over previous designs.

1. A robust 1/8" diameter shoulder screw replaces the previously used #4-40 screw.
2. The dog gear material is AMPCO® 18 Bronze. This material has similar properties to stainless steel (previously used), but has added lubricity for smooth shifting.
3. A new, super-strong shift block assembly with a larger bearing and steel housing (and threads!) is now included.
4. The input stage uses 32 DP gears and a press-fit 15 tooth CIM gear. This allows for an 85:15 first stage reduction.
5. This gearbox allows users to independently pick their high and low ratios, and are no longer confined to two set spreads.
6. The user can swap the ratios (A to B, B to A) as needed.
7. More encoder options are available, including the US Digital E4T (standard) and the CTRE SRXmag encoder (sold separately).
8. Aggressive weight reduction features have been machined into the gears and plates.
9. All of the cluster gears have the same features surrounding the bore on both sides. This allows the user to dis-assemble and assemble the shifter without worry of correct gear orientation.
10. Users can pick two or three stages for their transmission. An optional 3rd stage provides an additional C ratio choice of 1:1.14 or 2:1.
11. CIM Motors (2 or 3) can be ordered with the transmission. If these are configured with the product, then they will be shipped with the CIM gear installed on the motor shaft.
12. Using existing mounting plate holes, it can be mounted to an AM14U family chassis or a 2"x1" box tube frame.
13. A short, narrow air cylinder is being used, taking up less length compared to previously used cylinders.

Air Cylinder Shifting:
The EVO Shifter only uses a pneumatic shift method.

• A spring-extended PHD pneumatic cylinder (am-3494), powers the shift. This pneumatic shift can be done while a robot is accelerating, pushing or decelerating.
  • Extend Stroke (spring extend only): 4lbs
  • Extrend Stroke (if air actuated, 40PSI): 21.6 lbs
  • Retract Stroke (air actuated, 40PSI): 15.7lbs
• This cylinder extends into the selected "Ratio A" when no air pressure is supplied. This allows a robot to continue to drive using Ratio A if air pressure is lost.

Weight Range (Without Motors): 
Two Stage: 2.9 - 3.2 Pounds
Three Stage: 3.3 - 3.5 Pounds

Note about CIMs:
The EVO Shifter utilizes a 15 Tooth 32DP gear as the CIM gear which requires a press fit. Due to the intended interference fit (0.001 - 0.002") along the 0.750" long gear, a minimum 3 ton arbor press is required to install this gear onto the motor in conjunction with a provided aluminum spacer to help set the distance of which the pinion should be installed from the end of the motor shaft (approximately 0.40"). If you do not have access to this size arbor press, we have the option to add CIM motors to your order with the pinion gears pre-installed, available as am-0255_15T. 

Usage, Greasing and Break-in: 
All AndyMark gearboxes require grease for proper operation and long life. Use our Red Tacky Grease, 14.2 gram (am-2768). However, before applying grease, it is helpful to run the gearbox for 30 minutes without grease to allow the gear teeth to wear in. While we do design with short run times in mind, this 'break in' period for smooth gearbox operation is recommended. Once this is completed, apply grease to the spur gears periodically to ensure smooth operation. No grease is needed on the AMPCO® bronze dog gear.

Note: Please specifiy the ratio at check out. See the Andymark site for ratio details.

 

The EVO Shifter is our next EVOlution of a shifting transmission gearbox. It's design was developed from the lessons learned during our experience using the AM Shifter since 2004, the Super Shifter since 2007 and the Sonic Shifter since 2013.

This transmission is a two-speed, shift-on-the-fly gearbox, using an improved 4-tooth dog shifting method. Motor input can be two or three CIM motors (or AM Planetary Gearboxes). The transmission can be configured with two or three interior stages, and a selection of various 1/2 inch output shafts. Plates are designed for mounting either two or three CIM motors. No servo shifting is available with this shifter. This transmission is shipped assembled, but without the CIM motors installed, even if the CIM motors are ordered with the gearbox. 

Improvements: 
Fourteen significant improvements, not seen in previous AndyMark shifters, have been implemented in the EVO Shifter.

The dog gear now has 4 dogs on each face. This allows more material around the dog gear screw, increasing strength over previous designs.

1. A robust 1/8" diameter shoulder screw replaces the previously used #4-40 screw.
2. The dog gear material is AMPCO® 18 Bronze. This material has similar properties to stainless steel (previously used), but has added lubricity for smooth shifting.
3. A new, super-strong shift block assembly with a larger bearing and steel housing (and threads!) is now included.
4. The input stage uses 32 DP gears and a press-fit 15 tooth CIM gear. This allows for an 85:15 first stage reduction.
5. This gearbox allows users to independently pick their high and low ratios, and are no longer confined to two set spreads.
6. The user can swap the ratios (A to B, B to A) as needed.
7. More encoder options are available, including the US Digital E4T (standard) and the CTRE SRXmag encoder (sold separately).
8. Aggressive weight reduction features have been machined into the gears and plates.
9. All of the cluster gears have the same features surrounding the bore on both sides. This allows the user to dis-assemble and assemble the shifter without worry of correct gear orientation.
10. Users can pick two or three stages for their transmission. An optional 3rd stage provides an additional C ratio choice of 1:1.14 or 2:1.
11. CIM Motors (2 or 3) can be ordered with the transmission. If these are configured with the product, then they will be shipped with the CIM gear installed on the motor shaft.
12. Using existing mounting plate holes, it can be mounted to an AM14U family chassis or a 2"x1" box tube frame.
13. A short, narrow air cylinder is being used, taking up less length compared to previously used cylinders.

Air Cylinder Shifting:
The EVO Shifter only uses a pneumatic shift method.

• A spring-extended PHD pneumatic cylinder (am-3494), powers the shift. This pneumatic shift can be done while a robot is accelerating, pushing or decelerating.
  • Extend Stroke (spring extend only): 4lbs
  • Extrend Stroke (if air actuated, 40PSI): 21.6 lbs
  • Retract Stroke (air actuated, 40PSI): 15.7lbs
• This cylinder extends into the selected "Ratio A" when no air pressure is supplied. This allows a robot to continue to drive using Ratio A if air pressure is lost.

Weight Range (Without Motors): 
Two Stage: 2.9 - 3.2 Pounds
Three Stage: 3.3 - 3.5 Pounds

Note about CIMs:
The EVO Shifter utilizes a 15 Tooth 32DP gear as the CIM gear which requires a press fit. Due to the intended interference fit (0.001 - 0.002") along the 0.750" long gear, a minimum 3 ton arbor press is required to install this gear onto the motor in conjunction with a provided aluminum spacer to help set the distance of which the pinion should be installed from the end of the motor shaft (approximately 0.40"). If you do not have access to this size arbor press, we have the option to add CIM motors to your order with the pinion gears pre-installed, available as am-0255_15T. 

Usage, Greasing and Break-in: 
All AndyMark gearboxes require grease for proper operation and long life. Use our Red Tacky Grease, 14.2 gram (am-2768). However, before applying grease, it is helpful to run the gearbox for 30 minutes without grease to allow the gear teeth to wear in. While we do design with short run times in mind, this 'break in' period for smooth gearbox operation is recommended. Once this is completed, apply grease to the spur gears periodically to ensure smooth operation. No grease is needed on the AMPCO® bronze dog gear.

Note: Please specifiy the ratio at check out. See the Andymark site for ratio details.

 

The EVO Shifter is our next EVOlution of a shifting transmission gearbox. It's design was developed from the lessons learned during our experience using the AM Shifter since 2004, the Super Shifter since 2007 and the Sonic Shifter since 2013.

This transmission is a two-speed, shift-on-the-fly gearbox, using an improved 4-tooth dog shifting method. Motor input can be two or three CIM motors (or AM Planetary Gearboxes). The transmission can be configured with two or three interior stages, and a selection of various 1/2 inch output shafts. Plates are designed for mounting either two or three CIM motors. No servo shifting is available with this shifter. This transmission is shipped assembled, but without the CIM motors installed, even if the CIM motors are ordered with the gearbox. 

Improvements: 
Fourteen significant improvements, not seen in previous AndyMark shifters, have been implemented in the EVO Shifter.

The dog gear now has 4 dogs on each face. This allows more material around the dog gear screw, increasing strength over previous designs.

1. A robust 1/8" diameter shoulder screw replaces the previously used #4-40 screw.
2. The dog gear material is AMPCO® 18 Bronze. This material has similar properties to stainless steel (previously used), but has added lubricity for smooth shifting.
3. A new, super-strong shift block assembly with a larger bearing and steel housing (and threads!) is now included.
4. The input stage uses 32 DP gears and a press-fit 15 tooth CIM gear. This allows for an 85:15 first stage reduction.
5. This gearbox allows users to independently pick their high and low ratios, and are no longer confined to two set spreads.
6. The user can swap the ratios (A to B, B to A) as needed.
7. More encoder options are available, including the US Digital E4T (standard) and the CTRE SRXmag encoder (sold separately).
8. Aggressive weight reduction features have been machined into the gears and plates.
9. All of the cluster gears have the same features surrounding the bore on both sides. This allows the user to dis-assemble and assemble the shifter without worry of correct gear orientation.
10. Users can pick two or three stages for their transmission. An optional 3rd stage provides an additional C ratio choice of 1:1.14 or 2:1.
11. CIM Motors (2 or 3) can be ordered with the transmission. If these are configured with the product, then they will be shipped with the CIM gear installed on the motor shaft.
12. Using existing mounting plate holes, it can be mounted to an AM14U family chassis or a 2"x1" box tube frame.
13. A short, narrow air cylinder is being used, taking up less length compared to previously used cylinders.

Air Cylinder Shifting:
The EVO Shifter only uses a pneumatic shift method.

• A spring-extended PHD pneumatic cylinder (am-3494), powers the shift. This pneumatic shift can be done while a robot is accelerating, pushing or decelerating.
  • Extend Stroke (spring extend only): 4lbs
  • Extrend Stroke (if air actuated, 40PSI): 21.6 lbs
  • Retract Stroke (air actuated, 40PSI): 15.7lbs
• This cylinder extends into the selected "Ratio A" when no air pressure is supplied. This allows a robot to continue to drive using Ratio A if air pressure is lost.

Weight Range (Without Motors): 
Two Stage: 2.9 - 3.2 Pounds
Three Stage: 3.3 - 3.5 Pounds

Note about CIMs:
The EVO Shifter utilizes a 15 Tooth 32DP gear as the CIM gear which requires a press fit. Due to the intended interference fit (0.001 - 0.002") along the 0.750" long gear, a minimum 3 ton arbor press is required to install this gear onto the motor in conjunction with a provided aluminum spacer to help set the distance of which the pinion should be installed from the end of the motor shaft (approximately 0.40"). If you do not have access to this size arbor press, we have the option to add CIM motors to your order with the pinion gears pre-installed, available as am-0255_15T. 

Usage, Greasing and Break-in: 
All AndyMark gearboxes require grease for proper operation and long life. Use our Red Tacky Grease, 14.2 gram (am-2768). However, before applying grease, it is helpful to run the gearbox for 30 minutes without grease to allow the gear teeth to wear in. While we do design with short run times in mind, this 'break in' period for smooth gearbox operation is recommended. Once this is completed, apply grease to the spur gears periodically to ensure smooth operation. No grease is needed on the AMPCO® bronze dog gear.

Note: Please specifiy the ratio at check out. See the Andymark site for ratio details.

 

The EVO Shifter is our next EVOlution of a shifting transmission gearbox. It's design was developed from the lessons learned during our experience using the AM Shifter since 2004, the Super Shifter since 2007 and the Sonic Shifter since 2013.

This transmission is a two-speed, shift-on-the-fly gearbox, using an improved 4-tooth dog shifting method. Motor input can be two or three CIM motors (or AM Planetary Gearboxes). The transmission can be configured with two or three interior stages, and a selection of various 1/2 inch output shafts. Plates are designed for mounting either two or three CIM motors. No servo shifting is available with this shifter. This transmission is shipped assembled, but without the CIM motors installed, even if the CIM motors are ordered with the gearbox. 

Improvements: 
Fourteen significant improvements, not seen in previous AndyMark shifters, have been implemented in the EVO Shifter.

The dog gear now has 4 dogs on each face. This allows more material around the dog gear screw, increasing strength over previous designs.

1. A robust 1/8" diameter shoulder screw replaces the previously used #4-40 screw.
2. The dog gear material is AMPCO® 18 Bronze. This material has similar properties to stainless steel (previously used), but has added lubricity for smooth shifting.
3. A new, super-strong shift block assembly with a larger bearing and steel housing (and threads!) is now included.
4. The input stage uses 32 DP gears and a press-fit 15 tooth CIM gear. This allows for an 85:15 first stage reduction.
5. This gearbox allows users to independently pick their high and low ratios, and are no longer confined to two set spreads.
6. The user can swap the ratios (A to B, B to A) as needed.
7. More encoder options are available, including the US Digital E4T (standard) and the CTRE SRXmag encoder (sold separately).
8. Aggressive weight reduction features have been machined into the gears and plates.
9. All of the cluster gears have the same features surrounding the bore on both sides. This allows the user to dis-assemble and assemble the shifter without worry of correct gear orientation.
10. Users can pick two or three stages for their transmission. An optional 3rd stage provides an additional C ratio choice of 1:1.14 or 2:1.
11. CIM Motors (2 or 3) can be ordered with the transmission. If these are configured with the product, then they will be shipped with the CIM gear installed on the motor shaft.
12. Using existing mounting plate holes, it can be mounted to an AM14U family chassis or a 2"x1" box tube frame.
13. A short, narrow air cylinder is being used, taking up less length compared to previously used cylinders.

Air Cylinder Shifting:
The EVO Shifter only uses a pneumatic shift method.

• A spring-extended PHD pneumatic cylinder (am-3494), powers the shift. This pneumatic shift can be done while a robot is accelerating, pushing or decelerating.
  • Extend Stroke (spring extend only): 4lbs
  • Extrend Stroke (if air actuated, 40PSI): 21.6 lbs
  • Retract Stroke (air actuated, 40PSI): 15.7lbs
• This cylinder extends into the selected "Ratio A" when no air pressure is supplied. This allows a robot to continue to drive using Ratio A if air pressure is lost.

Weight Range (Without Motors): 
Two Stage: 2.9 - 3.2 Pounds
Three Stage: 3.3 - 3.5 Pounds

Note about CIMs:
The EVO Shifter utilizes a 15 Tooth 32DP gear as the CIM gear which requires a press fit. Due to the intended interference fit (0.001 - 0.002") along the 0.750" long gear, a minimum 3 ton arbor press is required to install this gear onto the motor in conjunction with a provided aluminum spacer to help set the distance of which the pinion should be installed from the end of the motor shaft (approximately 0.40"). If you do not have access to this size arbor press, we have the option to add CIM motors to your order with the pinion gears pre-installed, available as am-0255_15T. 

Usage, Greasing and Break-in: 
All AndyMark gearboxes require grease for proper operation and long life. Use our Red Tacky Grease, 14.2 gram (am-2768). However, before applying grease, it is helpful to run the gearbox for 30 minutes without grease to allow the gear teeth to wear in. While we do design with short run times in mind, this 'break in' period for smooth gearbox operation is recommended. Once this is completed, apply grease to the spur gears periodically to ensure smooth operation. No grease is needed on the AMPCO® bronze dog gear.

The AndyMark EVO Slim for CIM is a line of single-speed gearboxes, offering a high performance, lightweight solution to create robust drivetrains for competition robots. The EVO Slim line of gearboxes share many common parts with the EVO Shifter, including weight relieving features, as well as all steel gears and aluminum plates. The EVO Slim gearboxes ship with the am-0801a Toughbox® Long Hex Output Shaft as standard, but teams can switch out the shaft for any other Toughbox® Output Shaft (sold separately.)

The AndyMark EVO Slim for CIM is a line of single-speed gearboxes, offering a high performance, lightweight solution to create robust drivetrains for competition robots. The EVO Slim line of gearboxes share many common parts with the EVO Shifter, including weight relieving features, as well as all steel gears and aluminum plates. The EVO Slim gearboxes ship with the am-0801a Toughbox® Long Hex Output Shaft as standard, but teams can switch out the shaft for any other Toughbox® Output Shaft (sold separately.)

The AndyMark EVO Slim for RedLine single-speed gearbox is a high performance, lightweight solution for a robust drivetrain gearbox. The EVO Slim line of gearboxes share many common parts with the EVO Shifter, including some of the weight relieved, all steel gears and aluminum plates. The EVO Slim gearboxes ship with the am-0801a Toughbox Long Hex Output Shaft as standard, but teams can switch out the shaft for any other Toughbox Output Shaft (sold separately.) This configuration of the EVO Slim accepts up to four AndyMark RedLine Motors for a significant power-to-weight ratio improvement as compared to CIM-based gearboxes. The ratios available for this gearbox are primarily optimized to be used with 4" diameter wheels.