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    25 Series Symmetrical Hub Sprockets 500Hex, 14 Tooth

    The 25 Series Plate Sprockets: They roll! They turn! They spin! Everything you could possibly want from a plate sprocket.


    These Aluminum sprockets work perfectly with hex shaft and mesh with #25 roller chain.

    # Pièce: am-4773
    Disponibilité: 14 en stock
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    Andymark Hubs 1/2 in. Hex

    (En stock)

    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!

    3 inch Compliant Wheel, 1/2 inch Hex, 35A Durometer, Green

    (88 En stock)

    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.




    • 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.




    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

    1.86-0375 Plastic Spacer

    (En stock)
    1.860 inch long spacer, with 3/8" nominal id, made from 3/8" schedule 80 gray PVC pipe Specifications: Material: 3/8 inch schedule 80 PVC pipe Inside diameter: 0.42 inch Outside diameter: 0.68 inch Length: 1.860 inch Weight: 0.024 pounds

    25 Series Symmetrical Hub Sprockets 500Hex, 18 Tooth

    (9 En stock)

    9 different offerings of our 25 Series Hub Sprockets. These are perfect for meshing with roller chain and finally getting that-thing-that-you-need-to-spin moving!


    These aluminum sprockets work perfectly with 1/2 in. hex shaft and mesh with #25 roller chain. They are symmetrical and have the same sized hub on both sides so there's no wrong way to install them. The hub is also sized to ride on only the inner race of a bearing for smooth motion without binding or rubbing.

    Note: Despite the prints, at this time, tooth alignment to the bore is not controlled on these sprockets.


    Part Number Tooth Count Bore Pitch Diameter (in.) Outside Diameter (in.)
    am-4772 10 8mm key 0.810 0.928
    am-4773 14 1/2 in. Hex 1.123 1.251
    am-4774 14 3/8 in. Hex 1.123 1.251
    am-4775 18 1/2 in. Hex 1.440 1.572
    am-4776 18 3/8 in. Hex 1.440 1.572
    am-4777 22 1/2 in. Hex 1.757 1.893
    am-4778 22 3/8 in. Hex 1.757 1.893
    am-4779 26 1/2 in. Hex 2.074 2.212
    am-4780 26 3/8 in. Hex 2.074 2.212




    • Chain Series: 25
    • Material: 7075 Aluminum
    • Thickness: 0.500 in.

    6" HiGrip Rubber Tread Wheel Rev2

    (En stock)

    FTC Note: This product is NOT legal for FTC, we recommend our Stealth Wheel.

    Product Overview: 
    This is a 6" diameter wheel with a polycarbonate body and a TPU rubber "HiGrip" tread profile. This wheel features a 77A durometer tread material that is durable with long-life wear characteristics. Use this wheel for great tread life and good drivetrain response. 

    We feel that these wheels are a more durable option for teams' drivetrains. While they provide good traction, they make for a maintenance-free wheel for the average team. Under normal circumstances we feel that these wheels will last most FIRST Robotics Competition teams the entire season. 
    No bearings or hubs are included in this wheel. 


    • Diameter: 6 inches
    • Body Material: Polycarbonate, black
    • Tread Material: TPU rubber, 77a durometer
    • Bore: 0.95 inch, with bearing pockets of 1.124 inch diameter x 0.25 inch deep on both sides
    • Weight: 0.5 pound
    • Bolt Pattern: six holes (0.17 inch diameter) on a 1.875 inch diameter bolt circle
    • Coefficient of friction: 0.95-1.0 static (on tight pile carpet)
    • Coefficient of friction on HDPE: 0.31
    • Side Load: In excess of 600 lbs at tread surface
    • Load capacity: 90 pounds


    • Use #10-24x3/4 thread forming screws to attach sprockets or hubs to this wheel. 

    With Axle and Hub:

    • If you wish to drive this wheel with an Axle and Hub, you can pick your hub by fitting any of the AndyMark hubs (not included) to this wheel. If this is your choice, then no bearing is needed. Use #10-24x3/4 thread forming screws to fasten a hub to this wheel.

    With Sprocket:

    • If you wish to drive this wheel with a sprocket, then the sprocket needs to be attached to the side of the wheel, and two ball bearingsneed to be pressed into the wheel (one on each side). The ball bearing must have a 1.125" od. For a 1/2" id, use am-0181 or am-0029. For a 3/8" id, use am-0209. Use #10-24x3/4 thread forming screws to fasten the sprocket to the wheel.

    With Bearings:

    • To press bearings into this wheel (for a free spinning wheel or for use with a sprocket), two ball bearings need to be pressed into the wheel (one on each side). The ball bearing must have a 1.125" od. For a 1/2" id, use am-0181 or am-0029. For a 3/8" id, use am-0209.

    0.192 in. ID 0.375 in. OD 1.5 in. Long Aluminum Spacer


    This spacer is made of aluminum and is 1.5 in. long. It is used in the Climber in a Box.



    • Inside Diameter: 0.192 in.
    • Length: 1.5 in.
    • Material: Aluminum
    • Outside Diameter: 0.375 in.