Advanced Motor Protection Technology

Protect Motors.
Eliminate Shaft Current.
Extend Bearing Life.

Sungturn provides three core product lines —amorphous/ nanocrystalline cores (suppress high-frequency common mode current), insulated bearing & bearing isolators (prevent contamination) and shaft grounding rings (divert shaft current to ground)— forming a complete closed-loop protection system for motor reliability.

Request a Quote View Products
3
Product Lines
5+
Key Industries
24h
Inquiry Response
Motor Protection Solution
Amorphous Nanocrystalline Cores
Maintenance-free Shaft Grounding Ring
No-Contact Wear Free Long Lasting Motor Bearing Protection
Amorphous Nanocrystalline Cores
Amorphous/Nanocrystalline Cores
 Bearing Isolators
Bearing Isolators
 Shaft Grounding Rings
Shaft Grounding Rings
✓ISO 9001 Certified Supply Chain
✓Export to Europe · North America · SEA
✓Standard & Custom OEM Available
✓Sample Delivery in 7–14 Days
✓Free Technical Selection Support
Product Lines

Three Core Products,
One Complete Protection System

From electromagnetic filtering to shaft current elimination and mechanical sealing — Sungturn covers every layer of motor protection.

Amorphous/Nanocrystalline Cores
EMC Filtering

Amorphous/Nanocrystalline Cores

Featuring high saturation flux density, high magnetic permeability, wide frequency response and ultra-low magnetostriction, stable performance from -40℃ to 180℃, they are ideal for VFD industrial motors, automotive drive motors and chargers, new energy inverter, industry EMI filtering application etc.

  • High saturation flux density: 1.2 T ~ 1.5 T
  • Initial permeability: 20,000 – 150,000 μ
  • Frequency range: 10 kHz ~ 120 MHz
  • Available: toroidal, C-core, cut-core, custom
  • Applications: VFD motors, EV motors, OBC, DC-DC
Explore Product Range →
Bearing Isolators
Mechanical Bearing Protection

Bearing Isolators

Precision-engineered labyrinth seals with 12 design variants — from standard bronze to magnetic, IP67, and split-ring configurations. High-precision machining ensures superior sealing and extended equipment life.

  • Shaft diameter: 20 mm – 500+ mm
  • Material: Bronze, Aluminum, SS, PEEK, PTFE
  • 12 design types: standard, magnetic, IP67, split, etc.
  • API 610 / API 682 compatible designs
  • Inpro/Seal & Garlock equivalent
Explore Product Range →
Shaft Grounding Rings
Shaft Current Protection

Shaft Grounding Rings

Conductive microfiber rings that divert harmful shaft currents to ground — eliminating bearing fluting and EDM damage in VFD-driven motors.

  • Shaft diameter range: 6 mm – 500 mm+
  • Contact resistance: < 1 Ω (typical)
  • Fits: inboard, outboard, custom retrofit
  • AEGIS SGR direct replacement
  • Rated for 800V EV platforms
Explore Product Range →
Industry Solutions

Built for the Toughest
Industrial Environments

From 800V EV platforms to offshore wind towers and hazardous petrochemical zones — Sungturn products are engineered to perform.

🚗

New Energy Vehicles (EV)

800V drive motors and OBC units generate intense shaft currents and electromagnetic interference. Our integrated solution eliminates bearing damage and meets stringent EMC requirements.

Shaft Grounding RingNanocrystalline Core

Wind Power Generation

Offshore and onshore turbines face relentless vibration, salt spray, and temperature cycling. Bearing isolators eliminate lubricant leakage while shaft grounding rings protect against gear-induced shaft voltage damage.

Bearing IsolatorShaft Grounding Ring
🏭

Petrochemical & Refining

API-compliant bearing isolators for pumps, compressors, and mixers operating in hazardous, corrosive, or high-temperature environments. Explosion-proof rated options available.

Bearing IsolatorShaft Grounding Ring

VFD Industrial Motors

Variable frequency drives induce common-mode currents that destroy motor bearings within months. Our complete solution tackles both electrical and electromagnetic causes.

Shaft Grounding RingNanocrystalline CoreBearing Isolator

Marine & Offshore

Ship propulsion motors, pumps, and generators require zero-maintenance sealing solutions that withstand salt, vibration, and pressure differential. Stainless-steel bearing isolators built for marine-grade durability.

Bearing IsolatorShaft Grounding Ring
🖥️

Data Centers & AI Servers

High-density GPU and HPC power supplies demand ultra-low EMI. Nanocrystalline common-mode chokes provide superior suppression at high switching frequencies.

Nanocrystalline CoreAmorphous Core
Why Sungturn

The Sungturn Advantage

We exist because our customers needed a single, reliable partner for all three layers of motor protection.

3-in-1

Complete Protection

One supplier for EMC cores, shaft grounding, and mechanical bearing sealing. Simplified procurement, consistent quality, unified technical support.

24h

Fast Response

Technical inquiry responded within 24 hours. Quotation in 48 hours. Sample dispatch in 7–14 days. We move at the speed your project demands.

OEM

Custom Manufacturing

All products available in standard and fully customized configurations — dimensions, materials, certifications, private labeling. Your spec, our expertise.

ISO

Certified Quality

Our supply chain partners hold ISO 9001, IATF 16949, CE, and RoHS certifications. Full traceability and material test reports available.

Certifications & Compliance

Quality You Can Verify

All products are sourced from certified manufacturers. Documentation available upon request.

🏆

ISO 9001:2015

Quality Management System

🚗

IATF 16949

Automotive Quality Standard

🇪🇺

CE Marking

European Conformity

♻️

RoHS Compliant

Hazardous Substance Free

🛢️

API 610 / 682

Petrochemical Standards

Ready to Protect Your Motors?

Send us your motor specs and we'll recommend the right protection solution — free of charge.

Start Your Free Consultation →
Contact Us

Let's Talk About
Your Project

Get in Touch

Whether you need a quick quote, product selection guidance, or want to discuss an OEM partnership — our team is ready to help within 24 hours.

✉️
🌐
📍

Company

© 2026 Beijing Sungturn All Rights Reserved

Beijing, China

📞
⏱️

Response Time

Inquiries answered within 24 business hours

Send an Inquiry

We typically respond within 24 hours.

Thank you! Your inquiry has been sent. We will contact you within 24 hours.