8'' Mecanum Wheel Set (2 LEFT & 2 RIGHT)

• 4x 8" Mecanum Wheels (2x LEFT, 2x RIGHT)
• 12 Rubber rollers each wheel
• 1/8" thick aluminum plates
• Weight: 2.5 lbs each wheel
• Unassembled
• Capacity per wheel: 40kg (88 pounds)  

As well as moving forward and backward like conventional wheels, Mecanum wheels allow sideways movement by spinning wheels on the front and rear axles in opposite directions. The Mecanum-style drive base uses 4 wheels, including 2 right wheels and 2 left wheels. One right and left is on each side of the robot. Each wheel is driven independently. As with a regular 4WD, the robot can also rotate about its own axis. Unlike Omni Wheels, the robot does not slip sideways.

The AndyMark Mecanum wheel uses 2 bent sheet metal plates and 12 rubber rollers. The sheet plates are 1/8" thick 6061 aluminum. 12 bent tabs are on each side plate, containing the 12 rollers. Each roller has a 3 inch long #10 screw holding it in place and a 2 inch long brass tube as a bearing. On either side of the roller, there are 2 washers, enabling the roller to move consistently. A Nylock nut captures the roller in between the side plates. Near the center bore of the wheel, 6 aluminum spacers and screws tightly hold the 2 side plates together.