SKF

Low Friction Seals for eDrive

SKF low friction seals for eDrive are specifically optimised PTFE or elastomer rotary shaft seals that dramatically reduce the parasitic torque on electric motor shafts and gearbox input/output shafts. The seal lip is engineered with a thin, flexible PTFE element that exerts a very low radial force while maintaining full fluid-tight contact, even at the extreme rotational speeds of an EV motor. Some designs incorporate a hydrodynamic spiral that pumps any migrated oil back toward the motor side. The seal’s drag torque is measured in N·mm rather than N·m, making a significant difference to the motor’s power consumption. These seals are validated in EV-specific fluids and through thermal/mechanical endurance tests that simulate the high-speed, frequent start-stop cycles of electric driving. By selecting SKF low friction eDrive seals, EV manufacturers can add precious kilometres to the vehicle’s certified range.