Standard 20DP Gears (1/2 in Hex, Steel, 48 Tooth, Weight Relieved)

Compliant wheels are not intended for moving robots, but moving objects. Compliant wheels give way to allow rigid objects to be manipulated easily. A line of multiple wheels on a driven hex shaft creates a very effective roller that ignores variations in the objects being driven. This makes for high-performance intakes and internal conveyors. The wheels are sized for an interference fit and tend to stay in place on a shaft, though a shaft collar may be used to make absolutely sure the wheels stay clear of other mechanisms or maintain consistent spacing.

The hex bore versions of this wheel are undersized, and are intended to be an interference fit on their respective hex shafts. This interference fit allows for effective torque transfer from the hex shaft to the wheel, as well as allowing the wheel to remain in place along the shaft without the need for spacers or collar clamps:

Different durometer ratings give each wheel unique characteristics. Green wheels (35A durometer) are the softest and most compliant around objects, while orange (40A), maroon (45A), and blue (50A) wheels are increasingly firm. The increased firmness also allows the latter wheels to carry a higher RPM rating. Check out the downloads tab for a chart showing wheels and their maximum RPM. 

Specifications

• Bore: 1/2 in. Hex, 3/8 in. Hex, Nub Bore
• Diameter: 2 in.
• Durometer: 35A (Green), ⠀40A (Orange), ⠀45A (Maroon), ⠀50A (Blue), 60A (Black)
• Hole Pattern: Qty 2 3.5 mm Holes on a 16 mm Circle for 8 mm bore wheels
• Material: TPU
• Maximum RPM: 6000 - 9000
• Weight: 0.035 lb.
• Width: 0.5 in.

Documents

Layout Print(s)

am-3571 2IN 375 Hex Compliant Wheel REV3.PDF

am-3462 2IN 500Hex Compliant Wheel REV3.PDF

am-3572 2IN 8mm Compliant Wheel REV4.PDF

CAD File(s)

am-3571 2IN 375Hex Compliant Wheel REV2.STEP

am-3572 2IN 8mm Compliant Wheel REV2.STEP

am-3462 2IN Molded 500Hex Compliant Wheel REV2.STEP

Additional File(s)

2 inch Compliant Wheel Expansion.pdf

Don't see what you need?

You asked, we listened! These 3" diameter HD (heavy-duty) solid-core Compliant Wheels are intended for manipulating objects where you need a little 'give' in your intake system. These wheels deform out of the way to allow rigid objects to be manipulated easily. This makes for high-performance intakes and internal conveyors. These wheels do not require the use of expensive hubs to be driven, thanks to their integrated high strength polycarbonate hubs - which are made from the same mold that creates our Hex Molded Spacers.

Different durometer ratings give each wheel unique characteristics. Green compliant wheels (35A durometer) are the softest and most compliant around objects, while maroon (45A) blue (50A) and black (60A) wheels are increasingly firm.

Specifications

• Bore: 0.375 in. Hex, 0.5 in. Hex, 5 mm Hex
• Color: Green, Black, Blue, Black
• Core Material: Polycarbonate
• Diameter: 3 in.
• Durometer: 35A (Green), 40A (Orange), 50A (Blue), 60A (Black)
• Tread Material: TPU
• Weight: 0.12 lbs
• Overall Width: 1 in.

Documents

Layout Print(s)

am-3946 3IN 375Hex Compliant Wheel REV3.PDF

am-3945 3IN 500Hex Compliant Wheel REV3.PDF

am-4537 3in 5mm Hex Molded Compliant Wheel.PDF

CAD File(s)

am-3946 3IN 375Hex Compliant Wheel REV 3.STEP

am-3945 3IN 500Hex Compliant Wheel REV 3.STEP

am-4537 3in 5mm Hex Molded Compliant Wheel.STEP

Our Entrapption Stars have two bore options, making them viable parts for both FRC and FTC! This product is frequently used as intake wheels for picking up game pieces. Made from silicone, they are flexible, yet firm, allowing for the ability to pick up objects of irregular shape.

The 1/2 in. Hex Bore option is designed to be an interference fit on any 0.5 in. Hex Shaft.  This means the bore is actually 0.425 in. and it will be a tight press on, but keep the entrapption star from rotating.

The CIM Sport is a competition tested high performance line of planetary gearboxes from AndyMark and BaneBots. The CIM Sport features numerous improvements over previous planetary gearboxes used on FIRST Robotics Competition robots. 

Our SpinTake has three bore options, making it a viable part for both FRC and FTC! This product is ideal as an intake "wheel" for picking up game pieces of varying shapes. Made from natural rubber, the SpinTake is flexible, yet firm. Its unique shape also allows it to be oriented to stay within the robot frame perimeter initially but can reach outside just by spinning. These work in a similar fashion to surgical tubing fingers on an axle, but are easier to implement and provide a cleaner look with more consistent results. 

The Hex Bore options are designed to be an interference fit on their associated Hex Shafts. This means it will be a tight press to install but will resist slipping under load. 

Specifications

• Bore: 5 mm Hex, Nub Bore, 1/2 in. Hex
• Length (Diameter): 3 in.
• Material: Natural Rubber
• Thickness: 0.5 in.

20 DP gears are the most common gears used in FIRST Robotics Competition gearboxes. Want to replace one of your existing gears? Building a custom gearbox? 

20 DP gears are the most common gears used in FIRST Robotics Competition gearboxes. Want to replace one of your existing gears? Building a custom gearbox? This page is a hub for all of our standard width, symmetrical 3/8 hex and 1/2 inch hex bore 20 DP gears.

Check out our other 20 DP Gear pages for Pinion Gears and Shifting Gears and other special gears like those for the Toughbox line.

Compliant Stars are the perfect thing for intake mechanisms. The soft material gives way to allow rigid objects to be manipulated easily. A line of multiple stars on a driven hex shaft creates a very effective roller that ignores variations in the objects being driven. The multiple-spoke design allows the star to act as a brush, creating more surface area to interact with and grab objects. This makes for high-performance intakes and internal conveyors. A shaft collar may be used to make absolutely sure the wheels stay clear of other mechanisms or maintain consistent spacing. Molded into the star are several guidelines. Cut the star at the lines (or elsewhere) to create more compact mechanisms. 

Different durometer ratings give each Compliant Star unique characteristics. Green stars (35A durometer) are the softest and most compliant around objects, while orange (40A), maroon (45A), and blue (50A) wheels are increasingly firm. Black (60A) is quite firm, while the Gray (80A) is nearly rigid. The increased firmness also allows the latter wheels to carry a higher RPM rating

The AndyMark Climber in a Box is a robust, lightweight, configurable and affordable solution for climbing challenges historically present in FRC end game periods. The design of Climber in a Box has been inspired by many team designs along the way including 254 and 2056. The final prototype for this climber was developed in partnership with FRC Team 3940 CyberTooth for the 2020/2021 Infinite Recharge season. This mechanism has been battle tested with hundreds of climbs on a full weight FRC Robot without failures, both in development and real match play. Available in single and two stage configurations, this product should help teams of all levels elevate their team's performance at competitions.

This product uses a "spring out, winch back" powertrain strategy, using off-the-shelf 3.5lb constant force springs to raise the included Hook Kit, and 3mm Dyneema Rope to retract it with the included Winch Kit. Simply unspool the included rope using a planetary gearbox to raise the hook(s), drive the robot up to the bar, and winch it back to elevate your robot. The AndyMark Climber in a Box does not include a motor or gearbox, but is compatible with many off-the-shelf planetary gearboxes on the market that have a 2" bolt circle mounting pattern and support a 2" long 1/2" hex output shaft, including the highly durable blue Sport Gearboxes.

The bearing kits within this product are designed to go from 2" square 1/16" wall aluminum tubing, down to a 1" square 1/16" wall tube, with a 1.5" square 1/16" wall tube in between for the 2 stage flavor of this product. A combination of durable 608 bearings and custom molded plastic components provide the bearing surfaces for a free-flowing telescoping tube mechanism with no 3D printed parts. Each stage has a maximum travel of 24.5."

The AndyMark Climber in a Box is an unassembled kit of everything you need (besides a gearmotor) that is designed to not require any precision machining in order to make your FRC robot climb. The plates included within the Hook Kit, Bearing Kits and Winch Kit are all designed to be assembled and used as drill guides for match drilling their mounting locations onto the aluminum tubes. Each tube is pre-cut to a 30" length so no cutting of the tubes is required to achieve maximum travel.

Watch the teaser video here

The inside black portion of this wheel is made from molded polycarbonate plastic. The outer tread is TPU (Thermoplastic PolyUrethane). This robust but lightweight wheel provides good traction on carpet and soft tiles. Stealth wheels are the perfect drive wheel for smaller (<50 lb.) robots, or for intakes and other auxiliary robot mechanisms. These wheels are available in a variety of bores and durometers. 4 in. Stealth Wheels feature a 6 bolt pattern on a 1.875 in. bolt circle for mounting sprockets, hubs, and gears. Nub Bore Stealth Wheels feature a 4 bolt pattern on a 16 mm bolt circle found in most FIRST Tech Challenge building systems. The lower the durometer the softer the wheel is, this makes it wear away faster, but also makes it more grippy.

Product Usage:
Many thread locking materials are not compatible with polycarbonate and can eat away at the plastic. Be sure to check which adhesives are okay to use with this product.

Specifications

• Bore: 1/2 in. Hex, 3/8 in. Hex, Nub Bore, 5 mm Hex
• Diameter: 2 in., 4 in.
• Durometer: 35A (Green), ⠀40A (Orange), ⠀50A (Blue), ⠀60A (Black), ⠀80A (Gray)
• Hole Pattern: Qty 4 3.5 mm Holes on a 16 mm Circle for 8 mm bore wheels
• Material: TPU, Polycarbonate
• Weight: 0.23lb, 0.1lb
• Width: 1 in.

Documents

Layout Print(s)

am-3664 2in 5mm Hex Stealth Wheel REV4.PDF

am-3156 2IN 8mm Stealth Wheel REV3.PDF

am-3436 2in 375Hex Stealth Wheel REV3.PDF

am-3155 2in 500Hex Stealth Wheel REV3.PDF

am-3665 4in 5mm Hex Stealth Wheel REV3.PDF

am-2648 4IN 8mm Stealth Wheel REV5.PDF

am-3435 4in 375Hex Stealth Wheel REV3.PDF

am-2647 4in 500Hex Stealth Wheel REV3.PDF

CAD File(s)

am-3664 2in 5mm Hex Bore Stealth Wheel REV3.STEP

am-3156 2IN 8mm Stealth Wheel.STEP

am-3436 2IN 375Hex Stealth Wheel REV2.STEP

am-3155 2IN 500Hex Stealth Wheel REV2.STEP

am-3665 4IN 5mm Hex Stealth Wheel REV2.STEP

am-2647 4inWheel 500 Hex REV2.STEP

am-3435 4in Wheel Integrated Hub 375 HEX with Tread REV2.STEP

am-2648 4inWheel 8mm Hub REV2.STEP