Mecanum wheels allow a robot to achieve omni-directional movement while supporting large weights. AndyMark mecanum wheels feature our patented designs. The rollers of our mecanum wheels are supported on both sides and not cantilevered.
Bengt Ilon invented this wheel concept while working for the Swedish company Mecanum AB in the early 1990's.
A 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, therefore a Mecanum-style drive base must
have 4 independent motors (and gearboxes, if used).
The 6" Mecanum wheels utilize 16 rollers positioned between 2 steel plates.
The 6" Mecanum HD wheel utilize 15 rollers positioned between 2 plates.
The 8" Mecanum wheels utilize 12 rollers, positioned between 2
aluminum side plates. These wheels are delivered in kit form,
The 10" Mecanum wheels utilize 12 rollers, positioned between 2 plates. The steel version has a tubular hub on the interior.
Common specs among Mecanum wheels:
All accept 1.125" OD ball bearings
Coefficient of friction tested on tight pile carpet
All wheels fit AndyMark Hubs
all 10" wheel rollers are SBR rubber
1.64" width at Hub
6 holes around a 1.875" diameter circle
all 6" and 8" wheel rollers are made of a polycarbonate interior and a urethane exterior
Driving a Wheel: There are two easy ways to drive a wheel. A wheel can be
driven with a sprocket or pulley in a “dead axle” setup or with a hub in a
“live axle” setup. Dead Axle: A sprocket or pulley is attached directly
to the wheel and the assembly spins on a stationary shaft. Live Axle: Wheel is attached to a hub and rotates
with the shaft
Use the below guide to determine the hardware needed.
Type of Mount
Hub to 6"
am-0196 (hardware kit 8)
six 10-32x 1& 1/2" screws and six locking nuts
Hub to 6" HD and 10"
am-2225 (hardware kit 13)
six 10-32x 3/4" screws and six locking nuts
Hub to 8"
NO ADDITIONAL HARDWARE NEEDED
Hub to 8" HD
Sprocket to 6"
am-0192 (hardware kit 4)
six 10-32x 2" screws, six locking nuts, and one 550 sprocket spacer
Sprocket to 6" HD
am-0887 (hardware kit 10)
six 10-32x2" screws, six locking nuts, and two 550 sprocket spacers
Sprocket to 8"
One 550 sprocket spacer
Sprocket to 8" HD
one am-0651 and one am-0207
use one 250 and one 550 spacer with current hardware (one of each needs to be purchased)
Sprocket to 10"
am-0189 (hardware kit 1)
six 10-32x1.25 screws, six locking nuts, one 550 sprocket spacer
Make your selections then click
Replacement and extra parts: Below are replacement and extra parts that make up our mecanum wheels. None of these items are needed to make the wheels above work. These are extra parts only.
Used to upgrade regular 8" wheels to contain end rollers providing a smoother rolling wheel. Contains: 96 outer rollers, 96 small bushings, 96 axles, 73 SHCS screws, 73 Nylock nuts, bag of 100 washers.
Used to upgrade regular 8" wheels to 8" HD providing a smoother rolling wheel and more weight support. Contains: 4, support spacers, 96 outer rollers, 96 small bushings, 96 axles, 73 SHCS screws, 73 Nylock nuts, bag of 100 washers.