
Stefa® HiSpin® EV40 Features & Benefits
- Designed for high surface speeds of up to 40 m/s
- Symmetrical design simplifies customer validation and part management
- Delivers consistent performance in both rotational directions
- Excellent sealing efficiency under diverse lubrication conditions
- Minimizes frictional torque and heat generation
- Accommodates shaft run-out for enhanced reliability
- Specially formulated fluorocarbon (FKM) demonstrates proven compatibility with numerous electric axle fluids
- Well suited for high-volume production

Phase-Shifted-Wave (PSW) Technology
Our patented PSW Technology is engineered for exceptional sealing performance even in highly lubricated environments. By reducing radial force and friction, the PSW design enhances efficiency and reliability.
Its symmetrical structure ensures consistent sealing in both rotational directions, while the innovative PSW hydrodynamic texture actively pumps fluid back to the oil side during shaft rotation, regardless of the direction of rotation. This advanced technology prevents leakage and enables the Stefa® HiSpin® EV40 to deliver outstanding performance at shaft surface speeds of up to 40 m/s.