Optional spur gear for 3-Pad Slipper Clutch. Precision-molded slipper clutch spur gear 78T 48P is made from XRAY's exclusive key mixture of composite product, allowing the apparatus become robust enough to take care of high-performance brushless motors. The spur gear was created to have the cheapest possible weight while staying strong and light. Each gear has a stamped tooth number for simple recognition.