PowerTorq™ Ball Splines are convenient and efficient devices that allow friction free linear motion while transmitting torque. Because of their reliability and high efficiency, they are utilized to replace conventional splines. In a ball spline assembly, recirculating bearing balls carry the load between the rotating member (inner race) and the rotating/sliding member (outer race).

Inner races are made of high quality 4150 alloy steel, induction hardened to Rc 56-60. Outer races are made of hardened steel with ball tracks heat treated to Rc 58-60. Ball spline inner and outer races are protected with a black oxide finish.