The one-piece hub/sprocket is made from chrome-moly steel and finished with black oxide. A steel key locks the wheel and sprocket together, so the torque on the sprocket gets transferred to the high-traction rubber tire.
One bronze and one ball bearing go into each wheel. The bore diameter is 1/2-inch. These sprockets are made to be used with #35 roller chain (3/8" pitch). The width of the tread is 1.5 inches.
These rugged wheels are ideal for robotics and other industrial and mobile applications. In robots with tank-type "skid steering," these plastic wheels make turning easier and reduce power consumption while turning. Two hard plastic drive wheels can be used in combination with two regular high-traction wheels. This will give a good mix of traction and ease of turning in robots that do not require uncompromised traction. Educational and experimental robots, along with robots intended to operate on carpet, work best with two, (or even four), hard plastic wheels.
Other sizes, including 3, 4, 5, 6, 8, 10, and 12.5-inch wheels, are also available. Search for "BattleKits Wheels".
