... .easy installation 3.widely application 4.high efficiency Saili Transmission gearbox parts:1.gearbox parts sliding friction bodies and ... cost, with self-locking function,4.the frictional torque, the transmission efficiency is low (30% ~ 40%). 5.although the ... , but its biggest advantage is that the frictional torque, high transmission efficiency (92% ~ 98%), high accuracy,6. the system stiffness ...