The MK4i module inverts the motors on an MK4 module to a lower position where they are out of the way and better protected. Overall height and center of gravity are therefore lower. The MK4i module also moves the wheel further into the corner of the chassis for a wider wheelbase which results in a more stable robot. Because the wheel is moved into an area the frame would typically occupy, the MK4i includes a secondary plate to properly box in the chassis.

Here is a high-traction wheel which includes a grippy rubber tire, an pneumatic inner tube, and a strong plastic hub. These parts are shipped to you in kit form. The unique aspect about this product is the competition-ready hub. The hub accepts any 200x50mm tire and inner tube, 1.125 in. (outside diameter) ball bearings (2 per wheel are needed), and the mounting holes needed to install hardware to be sprocket-driven or hub-driven. This wheel ships as a separate tire, inner tube, and hub halves.

Assembly is required.

Important Notes:

• Diameter: The nominal diameter for this wheel is actually 7.65 in. when inflated normally.
• Tube pinching: When assembling the tube within the two hub halves, be careful not to pinch the tube rubber between the plastic hub halves. If assembled with the tube pinched between the hub halves, the tube may puncture and leak.

RPM Rating and notes:

These wheels are designed to be propulsion wheels for driving a robot or wheel chair. The design intent is to be contacting the ground, being driven by a gearbox at a maximum speed of approximately 500 rpm (which results in 17 feet/sec).

Within some applications, this wheel has been used as a shooter of objects, spinning at a very high rpm. For these applications, a higher rpm shows that the wheel may wobble, since the valve stem is mounted off to one side of the center of the wheel hub. We have seen properly balanced wheels, using securely mounted hardware (longer screws, washers) that can handle 5,000 rpm. When spinning this wheel at speeds up to 5,000 rpm, please take proper safety precautions.


Included Hardware:

• Tire for 8 Inch Pneumatic Wheel (Metric Size 200x50mm)
• Inner Tube for 8 Inch Pneumatic Wheel, with 90 Degree Stem (for 200x50mm Tire)
• Hub Assembly for 8 inch Pneumatic Wheel, which includes two (2) black plastic hub halves and six (6) 4-40 x1 Pan Head Phillips thread rolling screws

NOT Included Hardware:

• Bearings
• #10 Screws and Nuts Needed to Mount a Hub (2 Inch Long Screws are Needed) or a Sprocket (2.25 Inch Long Screws are Needed)
• Aluminum Hub, if Driven by a Shaft

Wheel Structure:

The hub halves are held together with the #4-40 screws. This wheel can accept #10-32 screws for mounting sprockets or hubs, but these are NOT included since different length screws are needed to mount hubs or sprockets. These #10 screws can be mounted to the included 1.875 inch diameter bolt circle. The hub halves need to be assembled together so that the valve stem clearance holes line up. Locating features are present for easy alignment.

Usage:

With Axle and Hub:

• In order to drive this wheel with a hub, use Hardware Kit 11, which includes #10-32x2 screws (6) and #10-32 nylock nuts (6)

With Sprocket:

• In order to drive this wheel with a plate sprocket, use Hardware Kit 12, which includes a 550 Sprocket Spacer, #10-32x2.25 screws (6) and #10-32 nylock nuts (6).
• Two (2) bearings are needed for this wheel, if being driven by a sprocket. Use bearings with a 1.125 inch outer diameter. No flange is needed on either of the bearings.

Use as a caster:

• If you want to let this wheel spin without being driven, you will need to install two (2) bearings with 1.125 inch outer diameter.

Specifications

• Bolt Pattern: 6 holes, 0.20 diameter on 1.875 in. diameter bolt circle
• Bore: 1.00 in. thru hole, with 1.125 in. x 0.375 in. deep bearing pockets
• Diameter: 7.65 in.
• Load Capacity: 120 lbs
• Material: black polycarbonate, gray rubber
• Maximum Pressure: 35 psi
• Tread Width: 2 in.
• Valve Stem: The valve stem may stick out up to 0.375 in. from hub
• Weight: 1.13 lbs
• Width Across Middle: 1.8 in.

Documents

Guide(s)

8-inch Pneumatic Wheel Assembly Instructions AM-0970.pdf

The NeveRest Orbital Gearbox series of gearboxes feature a wide range of ratios to choose from. These gearboxes are compatible with 17 Tooth NeveRest Motors.

If you need the output shaft to be a 1/2" Hex, check out the 6 mm D to 0.5 in. Hex-Shaft Adapter (am-3744a)

Specifications

• Motor Input: NeveRest
• Motor Quantity: 1
• Mounting Geometry: 4 M3x0.5 in. on a 1.102 in. (28 mm) on a Bolt Circle
• Ratio: 3.7:1, 13.7:1, 19.2:1, 50.9:1, 263.7:1

The NeveRest Orbital gearmotor is a robust planetary gearmotor designed for FTC. With many ratios to choose from you can find the right motor for you, from a fast spinning intake to a high reduction arm, all are possible with NeveRest Orbitals. They have a pre-installed encoder and an output shaft directly in the center of the output face. The shaft is a 6 mm D and the gearbox housing is 37 mm in diameter.

The NeveRest Orbital gearmotor is a robust planetary gearmotor designed for FTC. With many ratios to choose from you can find the right motor for you, from a fast spinning intake to a high reduction arm, all are possible with NeveRest Orbitals. They have a pre-installed encoder and an output shaft directly in the center of the output face. The shaft is a 6 mm D and the gearbox housing is 37 mm in diameter.

This is the strong polycarbonate plastic hub for the 8 inch Pneumatic Wheel. This product is shipped in kit form. The hub's design is intended to accept any 200x50mm tire and inner tube, 1.125 inch (outside diameter) ball bearings (2 per wheel are needed), and the mounting holes needed to install hardware to be sprocket-driven or hub-driven.

Specifications:

• Weight:0.37 pounds
• Width: 1.8 inches
• Material: black polycarbonate plastic
• Bore: 1.00 inch thru hole, with 1.125 inch x 0.375 inch deep bearing pockets
• Bolt Pattern: 6 holes, 0.20 diameter on 1.875 inch diameter bolt circle
• Outside Diameter: 4.15 inches

Hardware: 

Included Hardware:

• Two (2) black plastic hub halves
• Six (6) #4-40x1 Pan Head Phillips thread rolling screws

NOT Included Hardware:

• bearings
• #10 screws and nuts needed to mount a hub (2 inch long screws are needed) or a sprocket (2.25 inch long screws are needed)
• tire and inner tube: Any 200x50mm tire and inner tube can fit this hub, as long as the inner tube has a 90 degree valve stem.

Wheel Structure: 

• The hub halves are held together with the #4-40 screws. This wheel can accept #10-32 screws for mounting sprockets or hubs, but these are NOT included since different length screws are needed to mount hubs or sprockets. These #10 screws can be mounted to the included 1.875 inch diameter bolt circle. The hub halves need to be assembled together so that the valve stem clearance holes line up. Locating features are present for easy alignment. 

Usage: 

With Axle and Hub:

• In order to drive this wheel with a hub, use Hardware Kit 11, which includes #10-32x2 screws (6) and #10-32 nylock nuts (6)

With Sprocket:

• In order to drive this wheel with a plate sprocket, use Hardware Kit 12, which includes a 550 sprocket spacer, #10-32x2.5 screws (6) and #10-32 nylock nuts (6).
• Two (2) bearings are needed for this wheel, if being driven by a sprocket. Use bearings with a 1.125 inch outer diameter. No flange is needed on either of the bearings.

Use as a caster: 

• If you want to let this wheel spin without being driven, you will need to install two (2) bearings with 1.125 inch outer diameter.

This bracket makes up part of the Intake System Kit. The system as a whole brings game objects into a robot. This individual bracket can be mounted to your robot and used in a number of different ways as a support for PG gearboxes, Sport Gearboxes, CIM motors or 1.125 in. Bearings. It includes C-C spacing for a 55 tooth timing belt or a 64T (total) 20DP gear pair.  

Specifications

• Depth: 0.13 in.
• Flange Depth: 1.13 in.
• Length: 5.19 in.
• Material: 5052 Aluminum

Documents

Layout Print(s)

am-3311a Intake Motor Mount Bracket REV2.PDF

CAD File(s)

am-3311a Intake Motor Mount Bracket REV2.STEP

This kit is equivalent to the FRC Kit of Parts KitBot. In conjunction with an AM14U5 drive train, and two additional motor controllers, these items can create a robot that can play some aspects of CRESCENDO℠. It’s also been designed so teams can build the KitBot and then further iterate on it to add additional features if they choose. Teams will still need basic power tools (drills, saws, etc.) in order to build this robot. 

The options here are configured per what teams can opt in or out of in the KOP. KitBot documentation will be available to all teams, and many of the items from the Black Tote that are used to build the KitBot are components that Veteran teams likely already have on hand or can easily replicate. 

NOTE: While the Black Tote does include two motor controllers we opted to not include them in either of our bundles due to the high cost, and high likelihood that teams will have extra brushed speed controllers available to use. 

Resources that will be made available by FIRST include:

• Build instructions for the KitBot with photos
• Basic code to operate the KitBot as designed in LabVIEW, Java, C++, and Python
  • Software guide for each language exploring the code and possible controls modifications
• CAD drawings of the KitBot
• A guide to describe the process of adding or improving the functionality of the KitBot
• Assembly Videos

Non-Black Tote Components:

• 4 - 0.192 in. ID x 0.375 in. OD x 0.625 in. Long Aluminum Spacer (am-1731)
• 4 - 0.192 in. ID x 0.375 in. OD x 0.250 in. Long Aluminum Spacer (am-4209)
• 6 - 1 in. Tee Gusset (am-4158)
• 2 - 2 x 2 x 10 mm Machine Key (am-1121)
• 2 - 8 mm Push On Retaining Ring (am-0033)
• 4 - 0.257 in. ID 0.500 in. OD 1.125 in. Long Aluminum Spacer (am-3944)
• 3 - Black Cable Ties 14 in. (am-1067_black)
• 4 - 1/4-20 x 1.5 in. Socket Head Cap Screw (am-1131)
• 4 - 1/4-20 x 3 in. Socket Head Cap Screw (am-1030)
• 8 - 1/4-20 Nylock Nut (am-1015)
• 45 - 10-32 x 1.5 in. Socket Head Cap Screw (am-1014)
• 47 - 10-32 Nylock Nut (am-1042)
• 2 - 10-32 x 1.5 in. Button Head Cap Screw (am-1730)
• 6 - 3 ft length 1 in. x 1 in. 0.063 in. Wall Thickness Box Tube (am-4203-3)
• 2 - 0.118 in. Thick 24 in. x 24 in. Polycarbonate Sheet (am-0980)

Black Tote Components:

• 2 - Top Corner Bracket (am-5294)
• 1 - Motor Mount Plate (am-5295)
• 2 - Tube Mounting Plate (am-5296)
• 2 - 4 in. 1/2 in. Hex Bore 40A Durometer Stealth Wheel (am-2647_orange)
• 2 - 1 in. 8 mm to 1/2 in. Hex Shaft Adapter (am-0588_long)
• 4 - 10-32 x 0.625 in. Socket Head Cap Screw with Nylon Thread Lock Patch (am-1120)
• 2 - 2.5 in. CIM Motor (am-0255)

This kit is equivalent to the FRC Kit of Parts KitBot. In conjunction with an AM14U5 drive train, and two additional motor controllers, these items can create a robot that can play some aspects of CRESCENDO℠. It’s also been designed so teams can build the KitBot and then further iterate on it to add additional features if they choose. Teams will still need basic power tools (drills, saws, etc.) in order to build this robot. 

The options here are configured per what teams can opt in or out of in the KOP. KitBot documentation will be available to all teams, and many of the items from the Black Tote that are used to build the KitBot are components that Veteran teams likely already have on hand or can easily replicate. 

NOTE: While the Black Tote does include two motor controllers we opted to not include them in either of our bundles due to the high cost, and high likelihood that teams will have extra brushed speed controllers available to use. 

Resources that will be made available by FIRST include:

• Build instructions for the KitBot with photos
• Basic code to operate the KitBot as designed in LabVIEW, Java, C++, and Python
  • Software guide for each language exploring the code and possible controls modifications
• CAD drawings of the KitBot
• A guide to describe the process of adding or improving the functionality of the KitBot
• Assembly Videos

Non-Black Tote Components:

• 4 - 0.192 in. ID x 0.375 in. OD x 0.625 in. Long Aluminum Spacer (am-1731)
• 4 - 0.192 in. ID x 0.375 in. OD x 0.250 in. Long Aluminum Spacer (am-4209)
• 6 - 1 in. Tee Gusset (am-4158)
• 2 - 2 x 2 x 10 mm Machine Key (am-1121)
• 2 - 8 mm Push On Retaining Ring (am-0033)
• 4 - 0.257 in. ID 0.500 in. OD 1.125 in. Long Aluminum Spacer (am-3944)
• 3 - Black Cable Ties 14 in. (am-1067_black)
• 4 - 1/4-20 x 1.5 in. Socket Head Cap Screw (am-1131)
• 4 - 1/4-20 x 3 in. Socket Head Cap Screw (am-1030)
• 8 - 1/4-20 Nylock Nut (am-1015)
• 45 - 10-32 x 1.5 in. Socket Head Cap Screw (am-1014)
• 47 - 10-32 Nylock Nut (am-1042)
• 2 - 10-32 x 1.5 in. Button Head Cap Screw (am-1730)
• 6 - 3 ft length 1 in. x 1 in. 0.063 in. Wall Thickness Box Tube (am-4203-3)
• 2 - 0.118 in. Thick 24 in. x 24 in. Polycarbonate Sheet (am-0980)

Black Tote Components:

• 2 - Top Corner Bracket (am-5294)
• 1 - Motor Mount Plate (am-5295)
• 2 - Tube Mounting Plate (am-5296)
• 2 - 4 in. 1/2 in. Hex Bore 40A Durometer Stealth Wheel (am-2647_orange)
• 2 - 1 in. 8 mm to 1/2 in. Hex Shaft Adapter (am-0588_long)
• 4 - 10-32 x 0.625 in. Socket Head Cap Screw with Nylon Thread Lock Patch (am-1120)
• 2 - 2.5 in. CIM Motor (am-0255)

This kit is the perfect addition to a Sport Gearbox to control back drive. This all-metal ratchet assembly is as rock solid and easy to use as the Sport gearboxes it works with. In fact, you can even add it to an already installed gearbox without changing the motor or the gearbox. Just detach the motor, add the ratchet to it, and reattach the assembly.

The ratchet was designed from the ground up with releasability in mind, meaning you can release the ratchet UNDER LOAD in just about any application you can come up with, including supporting a full weight FRC robot without having to lift any of the weight off! This also opens up a whole new set of potential mechanism applications as there is an off-the-shelf solution for easy in-match actuation via a small air cylinder.

This product can be set to lock either clockwise or counterclockwise depending on how it is assembled. Check out the assembly instructions at the bottom of the page for more details. 

To learn more about this ratchet, check out our video about it!

This kit is the perfect addition to a Sport Gearbox to control back drive. This all-metal ratchet assembly is as rock solid and easy to use as the Sport gearboxes it works with. In fact, you can even add it to an already installed gearbox without changing the motor or the gearbox. Just detach the motor, add the ratchet to it, and reattach the assembly.

The ratchet was designed from the ground up with releasability in mind, meaning you can release the ratchet UNDER LOAD in just about any application you can come up with, including supporting a full weight FRC robot without having to lift any of the weight off! This also opens up a whole new set of potential mechanism applications as there is an off-the-shelf solution for easy in-match actuation via a small air cylinder.

This product can be set to lock either clockwise or counterclockwise depending on how it is assembled. Check out the assembly instructions at the bottom of the page for more details. 

To learn more about this ratchet, check out our video about it!

This bearing plate is a great way to mount 1.125 in. OD (FR8) into thin or weak material that otherwise could not tolerate or support a press-fit.

 

Specifications:

• Material: 5052 Aluminum
• Bore: Press fit for FR8 bearing
• Thickness: 0.125 in.
• Bolt Pattern: 4x clearance for #10-32 on 2.00" circle
• Length: 1.875 in.
• Width: 1.875 in.
• Weight: 0.0275 in.

This is the grippy gray rubber tire which can be mounted to this Hub in order to make up the 8 in. Pneumatic Wheel.
 

Specifications

• CoF Forwards/backwards On Aluminum: 0.62 (fully inflated)
• CoF Forwards/backwards On Poly-carbonate: 0.61 (fully inflated)
• CoF Forwards/backwards On Steel: 0.49 (fully inflated)
• CoF Forwards/backwards On Tight Pile Carpet: 1.27 (fully inflated)
• Diameter: 7.65 in.
• Manufacturer: Cheng Shin Tire
• Material: gray rubber
• Maximum Pressure: 35 psi
• Tread Size: 8x2 in. (200x50mm)
• Weight: 0.65 lbs
• Width: 2 in.

This is a 25 foot section of a twisted pair of 22 AWG wire.

Specifications

• Gauge: 22 AWG
• Length: 25 feet

This is the most basic robot interaction elements from the Stage in the 2024 FIRST® Robotics Competition CRESCENDO℠ presented by Haas.

NOTE: The version we are selling does not include the surrounding structure, only the 3 flap assemblies, the polycarbonate sheet on top that locates the Microphones, and 3 chain kits. Teams will need to provide their own truss and surrounding structure to use this product effectively.  

AprilTag stickers and plates are NOT included in this product but can be purchaced separately. 

Included Components:

• 3 - CRESCENDO℠ Stage Flap (am-5196)
• 3 - CRESCENDO℠ Stage Single Chain Set (am-5189)
• 3 - Wire-Lock Clevis Pin (am-1720)
• 1 - CRESCENDO℠ Stage Polycarbonate Top (am-5197)

Usually Ships in 1 to 2 Weeks