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High-Performance Sealing Solutions for Electric Vehicle (EV) Traction Motors 

Modern EV traction motors are pushing the limits, reaching speeds of 20,000 rpm and beyond. As the industry advances, the focus is on improving efficiency and power density, with trends moving toward direct cooling methods and higher rotational speeds.

 

At Trelleborg Sealing Solutions, we bring decades of expertise in sealing complex applications, making us a trusted partner in EV technology development. Our latest innovation, the Stefa® HiSpin® EV40, is designed to protect critical EV motor components across varying temperatures and lubrication conditions.

 

Featuring our proprietary Phase-Shifted-Wave (PSW) Technology, the Stefa® HiSpin® EV40 delivers superior low-friction sealing, ensuring optimal performance, durability, and reliability. It minimizes torque losses while effectively shielding against lubricants, making it the ideal solution for high-speed EV traction motors. 

Download the Stefa® HiSpin® EV40 Flyer
Webinar Registration_Stefa HiSpin EV40

Stefa® HiSpin® EV40 Webinar

Trelleborg Sealing Solutions automotive engineers introduce the new Stefa® HiSpin® EV40 and demonstrate how it optimizes EV motor performance through its innovative PSW Technology.
Watch the webinar on-demand
HiSpin EV40 Application

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

 

HiSpin EV40 PSW

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.​