4" HD Mecanum, Wheel Set

4" HD Mecanum, Wheel Set

  • $ 5,838.17

Product Overview:
4 inch, HEAVY DUTY Mecanum wheel set, these come assembled as shown in the picture. This is a set of 4 wheels, consisting of 2 "right" wheels and 2 "left" wheels. All 4 wheels are required to make a Mecanum drive holonomic system to work properly. This version of the wheel can handle a 100 pound load per wheel. The interior body of this wheel is made of molded black poycarbonate, while the perimeter side plate is made of 1/8 inch thick steel, zinc plated. The perimeter plate is riveted to the interior body, and each perimeter bent tab rests on the interior body rim. This support allows for the wheel to handle more load.

  • Diameter: 4 in.
  • Width Across Middle: 2.18 in.
  • Bore: 1.124 in.
  • Bolt Pattern: 6 holes (0.2 in. diameter) on a 1.875 in. diameter circle
  • Body Material, Outer: 0.12 in. thick steel, zinc plated
  • Body Material, Inner: molded black polycarbonate
  • Load Capacity: 200 pounds per wheel
  • Forward / Reverse Coefficient of Friction: 0.7 (on tight pile carpet)
  • Sideways Coefficient of Friction: 0.6 (on tight pile carpet)
  • Weight: 0.9 pound (each wheel)
  • Number of Rollers: 9
  • Roller Material, Outside: Urethane rubber (gray)
  • Roller Material, Inside: Nylon (white)
  • Roller Durometer: 77A
  • Roller Bearing Material: Nylon spinning over brass tube
  • Roller Axle: Brass tube
Individual Hardware within Each Wheel:
  • Two - HD Mecanum Plates
  • Two - Hubs
  • Nine - Individual 4 in. Wheel Rollers
  • Nine - Brass axle tubes
  • Nine - M3 x 55MM SHCS
  • Nine - M3 x 0.5" Nyock Nut
  • Eighteen - 1/8 in. dia. rivets
Roller and Axle Design:
The gray urethane rubber roller (am-3027) has a durometer rating of 77a. The roller has a Nylon core, and rides on a stationary brass tube.

Wheel Structure:
9 rubber rollers are sandwiched between 2 steel plates. The steel plates are riveted to two interior polycarbonate hubs, which form the interior of the wheel. The two interior pieces are held together by the fastening technique of the rollers being attached.

These wheels can be purchased individually as Left (am-3026L) or Right (am-3026R) wheels. They are sold without hubs, sprockets, or bearings.


For FTC Robots: If attached to a shaft or NeveRest motor, these parts are needed for each wheel
With Axle and Hub: If driven by a shaft, these parts are needed for each wheel
  • A hub that matches the size of the drive shaft. For 1/2 in. dia. shafts, use a 1/2 in. Key Hub (am-0077a) for each wheel.
  • #10-24 thread-forming screws are used to fasten a hub to the wheel (we suggest 6).
  • 1/8 x 1/8 x 3/4 steel machine key (am-1043) is needed, one per wheel
With Sprocket: If driven by a sprocket, these parts are needed for each wheel
  • Flanged ball bearings (qty. 2) with 1.125 in. od: either 3/8 in. inside diameter (am-0209), or 1/2 in. i.d. (am-0181)
  • A sprocket (type A) with a bolt hole circle of 1.875 in. diameter mounts to the wheels' interior bolt pattern.
  • #10-24 thread-forming screws are used to fasten a hub to the wheel (we suggest 6)