... to another. Within the limitations of center distance, spur gears provide a positive, constant speed drive, the ... spur gears are precision machined to close tolerances. Change Gears, Pinion Wire, Stem Pinions, Internal Gears and Rack are all spur gears ... easily molded to various shapes, excellent lubricity, high load capacityMaterial:Gears made of custom plastic materials to customer specifications ...