Electrically Insulated Spherical Roller Bearings
TFL’s electrically insulated spherical roller bearings utilize an advanced plasma spraying process to form a dense aluminum oxide coating on the bearing surface, perfectly combining superior electrical insulation properties with the inherent high load-carrying and self-aligning capabilities of the bearing.
- Superior Insulation Performance : Our advanced alumina ceramic coating provides reliable electrical protection with a breakdown voltage of up to 3000V DC, safeguarding your equipment.
- Durable and Robust Insulating Coating: With a hardness over 700HV, the coating is highly resistant to wear, shock, and vibration, ensuring stable performance in the toughest environments.
- Seamless Replacement & Convenient Upgrade: Fully interchangeable with standard bearings, allowing for a direct, hassle-free installation without requiring any modifications to your existing design.
- Uncompromised Mechanical Performance: Inherits the full load-carrying and self-aligning capabilities of a standard spherical roller bearing, making it ideal for heavy-duty applications.
- Excellent Return on Investment (ROI): By preventing electrical erosion, it extends bearing life and minimizes unplanned downtime, directly boosting your operational efficiency and profit.
- Professional Support & Rapid Response: Our technical team offers fast, comprehensive support for all your needs, from product selection to complete engineering solutions.
Technical Specifications
|
Parameter
|
Specification
|
|---|---|
|
Bore Size Range |
30 mm - 400 mm (Larger sizes available on request) |
|
Interchangeability |
Fully interchangeable with electrically insulated spherical roller bearings series from leading brands like FAG (22216 CA), NKE. |
|
Coating Location |
Outer Ring (Standard), Inner Ring (On request) |
|
Cage Material |
Machined Brass (Standard), Stamped Steel, Polyamide |
|
Internal Clearance |
C3 (Standard), C4, CN (On request) |
|
Breakdown Voltage |
Standard: 1000V DC. Enhanced: Up to 3000V DC |
|
Electrical Resistance |
> 50 MΩ (at Room Temperature) |
|
Coating Material |
Aluminum Oxide Ceramic (Al₂O₃), Plasma Sprayed |
|
Coating Thickness |
100 µm - 300 µm (Typical) |
|
Coating Hardness |
> 700 HV |
|
Operating Temperature |
-40°C to +150°C (-40°F to +302°F) |
|
Standards Compliance |
DIN, ISO |
|
Custom Solutions |
Insulation coating services for your existing ones |
Key Features & Benefits
Typical Applications
Industrial Motors
Industrial motors are the undisputed heart of productivity, driving essential processes across nearly every sector. However, modern Variable Frequency Drives (VFDs) generate damaging shaft currents that threaten motor longevity and reliability. TFL electrically insulated spherical roller bearings provide a robust barrier, breaking the circuit and protecting the motor’s core.
Key Benefits
- Prevents Electrical Erosion & Fluting
- Maximizes Motor Uptime & Reliability
- Reduces Unplanned Maintenance Costs
Traction Motors
Traction motors in rail and electric vehicles operate under demanding conditions where reliability is paramount. The high-frequency switching from modern inverters creates significant shaft current issues. TFL electrically insulated spherical roller bearings are engineered to provide the ultimate protection, ensuring the safety and operational integrity of these critical systems.
Key Benefits
- Prevents Electrical Erosion & Fluting
- Maximizes Motor Uptime & Reliability
- Reduces Unplanned Maintenance Costs
General FAQ
Find quick answers to common inquiries about our technology, product compatibility, and ordering process.
Can you maintain a long-term, stable supply of your insulated spherical roller bearings for me?
Our confidence stems from a complete and controllable support system:
Production and R&D Strength: We have our own modern production facility and an R&D team composed of top domestic engineers, ensuring production autonomy and continuous technological leadership.
Stable Supply Chain: We have signed long-term strategic cooperation agreements with top-tier raw material suppliers and maintain sufficient inventory, eliminating supply risks at the source.
Broad Market Trust: We serve numerous well-known domestic and international enterprises and have established long-term partnerships. A customer repurchase rate as high as 95% is the best proof of our product quality and service stability.
I previously used FAG electrically insulated spherical roller bearings. Can I replace them with yours?
And we are committed to providing value that exceeds expectations.
As a leading manufacturer of electrically insulated bearings in China, TFL has nearly 20 years of deep industry experience and proprietary core patents.
Our products not only achieve seamless replacement with mainstream brands like FAG in terms of performance but also create additional value for you in multiple dimensions:
International Standards, Quality Assurance: We are ISO certified, and our products strictly comply with international environmental and safety directives such as RoHS, REACH, and SGS, ensuring every product meets world-class standards.
Excellent Cost-Effectiveness: While ensuring equivalent or even higher performance, we can offer you more competitive pricing, significantly improving your return on investment.
Flexible and Agile Service: Compared to major brands, we offer a smaller Minimum Order Quantity (MOQ), more flexible purchasing options, and faster customer response to ensure your needs are met more quickly and effectively.
How do I determine whether I need inner ring or outer ring insulation?
General Principles and Application Scenarios: Outer ring insulation (most common): When the bearing is mounted in a conductive housing and the inner ring rotates with the shaft, outer ring insulation is the standard and efficient choice. It effectively blocks current conducted from the housing.
Inner ring insulation: In certain special applications, such as when the shaft needs to be electrically isolated from other parts of the equipment, or in applications where the outer ring rotates, inner ring insulation is used.
Special Operating Condition Considerations: In high-temperature or high-humidity environments, the outer ring coating provides additional corrosion protection for the bearing's outer diameter in addition to insulation.
Final Recommendation: The choice between inner and outer ring insulation depends on the current path, mounting method, and operating environment. The most reliable approach is to contact our bearing experts. Simply provide your equipment type and operating conditions, and we will offer the best model selection advice.
If the bearing model I need is not available, can I customize an electrically insulated spherical roller bearing?
We fully support customization services for non-standard models.
TFL has strong in-house production capabilities and flexible manufacturing systems, enabling us to respond quickly to your special requirements for dimensions or performance. Please contact our technical sales team directly with your specific operating conditions and parameter requirements, and we will provide you with a dedicated electrical protection solution, followed up from design to delivery.
