8 in. Pneumatic Wheel Kit

This is a Heavy Duty Hex Bearing which outperforms our previous 1/2" Hex Bearings as it has a Heavy Duty Inner Race. This FR8ZZ-HexHD bearing, 1/2" hex bore, flanged, heavy duty inner race, shielded ball bearing, has an inner race that is thicker and stronger than our recent offering of a similar bearing (am-0279). This bearing has more material between the corners of the hex bore and the edge of the race making it stronger and much less likely to crack under high load.

This bearing is guaranteed to have a stronger, thicker race. 100% of these bearings have been quality checked for a smooth fit over 1/2" hex stock here at AndyMark. Many of our long-time customers will recognize this bearing, as it is the same version we sold back in 2008-2011, and we did not have any failures. Now, it is renamed and quality checked for your high load needs - including drive chassis with cantilevered wheels.

Specifications:

• Inside diameter: 0.500-0.502 inch hex bore
• Outside diameter: 1.125 inch
• Flange thickness: 0.062 inch
• Overall thickness: 0.312 inch
• Weight: 0.05 pound

This is the 42 tooth pulley used in the AM14U family of chassis. It works with all 5 mm pitch HTD timing belts. This pulley has a 1.875 in. bolt circle making it easy to attach to many of our motion components. It also has a locking pattern that is compatible with many of our wheels.

This pulley comes as two identical halves that mesh with each other to create one pulley that is the correct width for a 15 mm timing belt.

Need to have two 15 mm belts on one pulley? Add in the 15 mm wide, 42 Tooth Pulley Extension (am-2813) and you can run two belts in two different directions.

Specifications

• Belt Profile: 5 mm pitch HTD timing belt, 15 mm wide
• Bolt Pattern: 0.2 in. diameter holes, evenly spaced on a 1.875 in. diameter bolt circle
• Bore: 0.95 in., with bearing pocket of 1.124 in. diameter x 0.25 in. deep
• Flange Diameter: 2.92 in.
• Material: Black Polycarbonate
• Outside Diameter: 2.575 in. (at outer tooth edge)
• Pitch Diameter: 2.632 in.
• Teeth: 42
• Weight: 0.12 lbs
• Width: 0.85 in. (both halves assembled together)

Each hub now has a "flower" pattern that fits and keys into our 42T 5 mm HTD Pulley, which means you are no longer constrained to our legacy 500EX Hex Hub for compatibility with this pulley. Every hub still maintains a closed-profile hole for maximum strength. Every shaft hub has been designed with bearing bosses on both sides that have been sized appropriately for the mating bearings that would pair with the bore through the hub, which means you can run each hub right against a bearing with no need for extra spacers. All of these hubs are also made from 7075-T6 aluminum, which is much stronger than the previously used 6061-T6, 6005, and 6105 alloys from our older designs. Where possible, the shoulder on shaft hubs was reduced to 7/8" in diameter for an easier fit with our molded plastic wheels, while still maintaining a precise 1.125" diameter boss for locating in wheels, sprockets, gears, and more. 

The holes are evenly spaced on a 1.875 in. circle and 0.201 inches in diameter. That's a perfect size for #10 bolts!

Learn how to attach these hubs to AndyMark wheels by watching this video!

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 axle creates a very effective roller that ignores variations in the objects being driven. This makes for high-performance intakes and internal conveyors.

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), blue (50A), and black (60A) 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. 

Please note maroon wheels are only intended for use in FTC. If more powerful motors are used to drive it the spokes may fail.

Specifications

• Bore: 1/2 in. Hex, 3/8 in. Hex, Nub Bore, 5 mm Hex
• Diameter: 4 in.
• Durometer: 35A (Green), ⠀40A (Orange), ⠀45A (Maroon), ⠀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
• Maximum RPM: 3000-9000
• Weight: 0.228 - 0.269 Lbs
• Width: 1 in.

Documents

Layout Print(s)

am-3562 4IN 375Hex Compliant Wheel REV3.PDF

am-3563 4IN 8mm Compliant Wheel REV4.PDF

am-3480 4IN 500Hex Compliant Wheel REV3.PDF

am-4538 4IN 5mm Hex Compliant Wheel.PDF

CAD File(s)

am-3562 4IN 375Hex Bore Compliant Wheel REV2.STEP

am-3563 4IN 8mm Round Compliant Wheel REV2.STEP

am-3480 4IN 500Hex Bore Compliant Wheel REV2.STEP

am-4538 4IN 5mm Hex Compliant Wheel.STEP

Guide(s)

4 inch Compliant Wheel Expansion.pdf

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 is a package of FOUR stick-on numbers, designed to be adhered to robot bumper material.

Specifications:

• Quantity: 4
• Material: White stick-on plastic
• Height: 4 inches
• Width: 2.6 inches
• Line width: 0.8 inch
• Weight: 0.004 pounds

Usage (for best application):

• Apply heat to cloth area using a heat gun or hairdryer for 30 seconds (prior to placing number). Do not put heat on or near pool noodles, as they will shrink.
• Place numbers in position on bumper material as desired with pressure.
• Apply heat to numbers using a heat gun or hairdryer for 30 seconds.
• Place under a static load for 5 minutes.

This is a package of FOUR stick-on numbers, designed to be adhered to robot bumper material.

Specifications:

• Quantity: 4
• Material: White stick-on plastic
• Height: 4 inches
• Width: 2.6 inches
• Line width: 0.8 inch
• Weight: 0.004 pounds

Usage (for best application):

• Apply heat to cloth area using a heat gun or hairdryer for 30 seconds (prior to placing number). Do not put heat on or near pool noodles, as they will shrink.
• Place numbers in position on bumper material as desired with pressure.
• Apply heat to numbers using a heat gun or hairdryer for 30 seconds.
• Place under a static load for 5 minutes.

This is a package of FOUR stick-on numbers, designed to be adhered to robot bumper material.

Specifications:

• Quantity: 4
• Material: White stick-on plastic
• Height: 4 inches
• Width: 2.6 inches
• Line width: 0.8 inch
• Weight: 0.004 pounds

Usage (for best application):

• Apply heat to cloth area using a heat gun or hairdryer for 30 seconds (prior to placing number). Do not put heat on or near pool noodles, as they will shrink.
• Place numbers in position on bumper material as desired with pressure.
• Apply heat to numbers using a heat gun or hairdryer for 30 seconds.
• Place under a static load for 5 minutes.

This is a package of FOUR stick-on numbers, designed to be adhered to robot bumper material.

Specifications:

• Quantity: 4
• Material: White stick-on plastic
• Height: 4 inches
• Width: 2.6 inches
• Line width: 0.8 inch
• Weight: 0.004 pounds

Usage (for best application):

• Apply heat to cloth area using a heat gun or hairdryer for 30 seconds (prior to placing number). Do not put heat on or near pool noodles, as they will shrink.
• Place numbers in position on bumper material as desired with pressure.
• Apply heat to numbers using a heat gun or hairdryer for 30 seconds.
• Place under a static load for 5 minutes.

These custom designed collar clamps have been designed specifically with FIRST Robotics Competition teams in mind. The one-piece collar clamp is a nice fractional 1/2 in. width to make shaft stackups easy. The clamping force is provided by a 10-32 socket head screw, which is bigger than most used in the competition marketplace.  This provides a high-strength clamping solution that shouldn't strip out when you need it most. You can even replace the 10-32 screw if it becomes lost with the screws historically used in the AM14U family of chassis. These thoughtfully designed collar clamps also have small bosses on each side. This allows these collar clamps to be installed directly adjacent to an FR8ZZ Round or FR8ZZ Hex bearing without rubbing on the outer races for smooth operation.