High-Performance Electrically Insulated Bearings
Safeguard your equipment from electrical damage. TFL Bearing comprehensive portfolio of electrically insulated bearings, featuring both inner and outer ring coated designs, provides the reliable protection you need. We deliver high-performance solutions engineered to extend the service life of your machinery.
Our Regular Products
We offer a variety of electric insulating bearings to choose from. The standard bearing classifications include deep groove ball bearings, cylindrical roller bearings, and tapered roller bearings. We have the standard bearing classifications shown below in stock and can deliver quickly.
-
Electrically Insulated Deep Groove Ball BearingsThe most versatile insulated bearing, ideal for high-speed applications and moderate loads in electric motors.
-
Electrically Insulated Cylindrical Roller BearingsEngineered for high radial loads and impact resistance, widely used in traction motors and large industrial motors.
-
Electrically Insulated Tapered Roller BearingsCapable of handling both radial and axial loads, making it the ideal solution for heavy-duty and specialized equipment.
-
Spherical Roller Electrically Insulated BearingsDesigned to handle misalignment and heavy-load conditions, providing superior reliability in harsh industrial environments.
Product Range
For bearing types and sizes not listed in the product tables (deep groove ball bearings, cylindrical roller bearings, Tapered roller bearings), please contact our online sales.
For smaller bearings than those listed, we recommend TFL hybrid ceramic bearings.
In addition to the standard assortment, TFL also offers special electrically insulating bearings and bearing units with complex toroidal geometries, such as:
Four-point contact ball bearings (fig. 1)
Flanged tapered roller bearings (fig. 2)
Tapered roller bearing units (TBU) (fig. 3)
Traction motor bearing units (fig. 4)
The TFL Advantage
We integrate patented technology, stringent quality control, and supply chain efficiency to deliver unmatched reliability and value to our partners.
Insulated Bearing Finder
The common configurations of electrically insulated bearings can be queried according to the table. In addition, we accept non-standard customization of various types of electrically insulated bearings.
Specs
Electrically Insulated Deep Groove Ball Bearings
Electrically Insulated Cylindrical Roller Bearings
Electrically Insulated Tapered Roller Bearings
Spherical Roller Electrically Insulated Bearings
Product
Outlooks
Bore Size Range
30 mm - 400 mm (Larger sizes available on request)
30 mm - 600 mm (Larger sizes available on request)
50 mm - 300 mm (Larger sizes available on request)
30 mm - 400 mm (Larger sizes available on request)
Interchangeability
Direct replacement for standard deep groove ball bearings. Perfectly interchangeable with SKF's INSOCOAT™ VL/VA series, FAG's J20AA/AB, SQ series, NSK and NTN insulated bearings.
Fully interchangeable with corresponding insulated bearing series from mainstream brands such as SKF (INSOCOAT® series, e.g., VA201, VA208 suffixes), FAG (e.g., J20AA, SQ78 suffixes), NSK (VS, VSA suffixes), and NTN (C3S, C4S suffixes).
Fully interchangeable with electrically insulated bearings from leading international brands such as SKF (INSOCOAT™), FAG, and NSK.
Fully interchangeable with insulated bearing series from leading brands like FAG (e.g.,22216 CA), NKE.
Coating Location
Inner Ring/Outer Ring
Inner Ring/Outer Ring
Inner Ring/Outer Ring
Inner Ring/Outer Ring
Cage Material
Brass/Nylon
Steel/Brass
Internal Clearance
C3/C4
C3/C4
N/A
C3/C4
Sealing Options
Optional
Optional
N/A
Optional
Breakdown Voltage
1000~3000 VDC
1000~3000 VDC
1000~3000 VDC
Electrical Resistance
>50 MΩ
>50 MΩ
Coating Material
Aluminum Oxide Ceramic (Al₂O₃)
Aluminum Oxide Ceramic (Al₂O₃)
Aluminum Oxide Ceramic (Al₂O₃)
Aluminum Oxide Ceramic (Al₂O₃)
Coating Thickness
100~500 µm
100~500 µm
100~500 µm
100~500 µm
Coating Hardness
>1100 HV
>1100 HV
>1100 HV
>1100 HV
Operating Temperature
-40°C to +150°C (-40°F to +302°F)
-40°C to +150°C (-40°F to +302°F)
-40°C to +150°C (-40°F to +302°F)
-40°C to +150°C (-40°F to +302°F)
Standards Compliance
ROHS, REACH
ROHS, REACH
ROHS, REACH
Custom Solutions
Customizable
Customizable
Customizable
Customizable
Typical Applications
We provide proven insulated bearing solutions that ensure both complete electrical protection and optimal mechanical performance, enhancing the longevity and reliability of your machinery in any industrial environment.
Bearings For Oil & Gas Industry
We utilize a robust aluminum oxide coating to provide superior electrical insulation in our bearings. This is vital for Oil & Gas operations, where stray currents from VFDs can cause sparks and lead to catastrophic failure in potentially explosive atmospheres. As a dedicated partner, we deliver insulated bearings that enhance equipment safety and maximize uptime for your critical machinery.
Hot Market
- TFL Top Drive Insulated Bearings
- Ensuring Continuous Operation of Mission-Critical Equipment
- Optional Coatings for Corrosive & High-Temp Environments
Bearings For Wind Power
Wind power is cornerstone of sustainable energy vital for combating climate change and the one solution to energy
issues such as the prevention of global warming.
Given the substantial maintenance costs and extended downtime associated with these large, eco-friendly systems, our bearings offer indispensable protection. By creating a robust dielectric barrier, they ensure the stable, reliable, and continuous operation of wind turbines, significantly reducing maintenance interventions and supporting a greener, more efficient energy future.
Hot Market
- Main Shaft Insulated Bearings
- High-Reliability & Long-Life Design
- Coating for Harsh Environments
Bearings For Industrial Motor
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’s insulated bearings offer critical protection, establishing a robust dielectric barrier. This prevents electrical erosion and premature failure, ensuring consistent, long-term performance of these vital machines. By safeguarding the ‘heart’ of your operations, our bearings significantly reduce unplanned downtime, cut maintenance costs, and enhance operational efficiency and motor lifespan.
Hot Market
- Insulation Protection for Machine Tool Motors
- Insulated Deep Groove Ball Bearings
- Insulated Cylindrical Roller Bearings
Bearings For Industrial Pumps & Fans
For VFD-driven industrial pumps and fans where stray currents threaten reliability, our insulated bearings are the proven solution. They feature a specialized dielectric coating that safely interrupts the electrical path, preventing catastrophic bearing failure and costly downtime. This makes our bearings a fundamental component for ensuring the safe, continuous operation of your most vital systems.
Hot Market
- Insulated Bearings for Machine Tool Motor
- Reducing Maintenance Frequency & Costs
- Standard Dimensions for Easy Replacement
Bearings For Mining Industry
The mining industry is foundational, providing essential raw materials that underpin modern infrastructure and technology. Operations involve colossal, heavy-duty machinery in harsh, often remote environments, demanding exceptional safety standards and continuous production. These demanding conditions, coupled with the high cost and risk of maintenance, make equipment reliability paramount.
TFL’s insulated bearings offer a critical safeguard, specifically engineered for the mining sector. They create a robust dielectric barrier, effectively blocking damaging shaft currents generated by Variable Frequency Drives (VFDs), which otherwise lead to electrical erosion and premature equipment failure. This ensures the stable and uninterrupted operation of vital mining equipment, significantly reducing costly downtime, enhancing worker safety, and sustaining productivity in the most challenging conditions.
Hot Market
- Crusher Insulated Bearings
- Design for High Contamination & Shock Loads
- Enhancing Equipment Reliability in Harsh Environments
Bearings For Oil & Gas Industry
We utilize a robust aluminum oxide coating to provide superior electrical insulation in our bearings. This is vital for Oil & Gas operations, where stray currents from VFDs can cause sparks and lead to catastrophic failure in potentially explosive atmospheres. As a dedicated partner, we deliver insulated bearings that enhance equipment safety and maximize uptime for your critical machinery.
Hot Market
- TFL Top Drive Insulated Bearings
- Ensuring Continuous Operation of Mission-Critical Equipment
- Optional Coatings for Corrosive & High-Temp Environments
General FAQ
Find quick answers to common inquiries about our technology, product compatibility, and ordering process.
Are your insulated bearings dimensionally interchangeable with standard bearings?
All our insulated bearings are manufactured to ISO standards. The insulation coating is extremely thin yet highly effective, so the boundary dimensions (bore, outer diameter, and width) are identical to their standard, non-insulated counterparts. This allows for a direct, "drop-in" replacement without any modification to your housing or shaft.
What is the difference between your ceramic-coated bearings and hybrid bearings?
- Our Coated Bearings: The most cost-effective solution designed specifically to stop electrical current damage while retaining the full strength of a steel bearing.
- Hybrid Bearings: Offer added benefits like higher speed capability but come at a significantly higher cost.
Why should we choose you over major brands like SKF or FAG?
As a specialized bearing manufacturer, we offer greater flexibility, faster lead times, and highly competitive pricing. We can readily provide customized solutions and smaller order quantities that larger corporations often cannot accommodate. You get direct access to our engineering team, ensuring you receive a product perfectly tailored to your needs, backed by rigorous quality control that meets or exceeds industry standards.
How can I apply for samples for preliminary testing?
More Than Standard Products: Flexible Custom Solutions
Whether you require the development of special-sized bearings or need insulation coating services for your existing ones, our technical team provides comprehensive support from design to flexible production, responding quickly to your unique needs.
