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4" HiGrip Wheel (am-2256)

 
Price: $6.00

Stock Status: In Stock
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FIRST Tech Challenge Note: This product is NOT legal for FTC. We recommend our Stealth Wheel for applications where digging into the surface is a concern.

Product Overview:
This is a 4 inch diameter wheel with HiGrip tread. The design of this wheel is very similar to our popular 6" HiGrip wheel, but with a smaller, 4" diameter. 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.

Specifications:
  • Diameter: 4 inches
  • Body Material: Polycarbonate, black
  • Tread Material: TPU (thermoplastic polyurethane)
  • Bore: 0.95"
  • Width: 1.375"
  • Weight: 0.31 pound
  • Bolt Pattern: six holes (0.17 inch diameter) on a 1.875 inch diameter bolt circle
  • Static coefficient of friction on tight pile carpet: 1.07
  • Static coefficient of friction on HDPE: 0.31
  • Load capacity: 100 pounds
Usage:
Use #10-24x3/4 thread forming screws to attach sprockets or hubs to this wheel. 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. This link will allow you to check which materials are okay to use with what adhesives, http://bit.ly/loctitematerialcheck

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 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. 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.

Average Customer Review: 5 of 5 Total Reviews: 20 Write your own review!

  0 of 0 people found the following review helpful:
 
4 inch wheels for ball launcher January 29, 2016
Reviewer: Anonymous Person from Imperial, CA United States  
I think this is the best option for direct driving from a CIM

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  0 of 0 people found the following review helpful:
 
Amazing grip on carpet October 5, 2015
Reviewer: John A. Tamplin from Smyrna, GA United States  


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  0 of 0 people found the following review helpful:
 
1.067? November 25, 2014
Reviewer: Anonymous Person from Minnesota  
Looking at the specs of our current robot, I come across a coefficient of friction of 1.067, which should be physically impossible. I have a hard time believing this, although such a feat could be accomplished on a carpet. But still, the robot accelerates at a seemingly impossible rate, running 2 CIMs on each side, and we are loving this "omnipotent" traction.

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  0 of 0 people found the following review helpful:
 
4 inch Hirip wheel November 7, 2014
Reviewer: Larry Gauthier from Wichita Falls, TX United States  
Excellent service, reasonable price, fast shipment. I couldn't ask for better service.

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  0 of 0 people found the following review helpful:
 
June 14, 2014
Reviewer: from Maine United States  


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