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Electrically Insulated Deep Groove Ball Bearings
TFL’s Electrically Insulated Deep Groove Ball Bearings feature an aluminum oxide coating. This insulation is applied to the outer or inner ring of a standard bearing. They resist electrical flashovers from voltages above 500V. With a thicker coating, they can withstand high-voltage discharge up to 3000V.
Regular motor bearings are prone to electrical corrosion damage. This impacts their operating life and smooth performance. TFL’s insulated bearings provide a solution to voltage breakdown problems. They also offer significant cost savings.
- Advanced Insulation Technology: Incorporates a precisely applied aluminum oxide ceramic coating, offering dielectric strength up to 3000V DC, meticulously tested to IEC standards for superior insulation integrity.
- Versatile Application: Prevents the electrical breakdown and carbonization of lubricants that can occur with current passage, thereby maintaining optimal lubrication properties and reducing friction.
- Precision Engineering: Manufactured to the highest dimensional and running accuracy (e.g., ABEC-1 / P0 or higher), ensuring smooth operation and low noise levels comparable to standard precision bearings.
- Robust Construction: The insulation layer is highly resistant to mechanical shock and environmental factors, ensuring durable protection throughout the bearing's operational life.
- Versatile Design & Compatibility: Available in a comprehensive range of sizes and configurations, ensuring direct compatibility with a multitude of motor and generator designs.
- Comprehensive Technical Support: Our engineering team is available to assist with complex application analysis, ensuring optimal bearing selection and integration for your specific needs.
Technical Specifications
|
Parameter
|
Specification
|
|---|---|
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Bore Size Range |
30 mm - 400 mm (Larger sizes available on request) |
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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's VS/VSA, and NTN's C4S/C3S insulated bearings. |
|
Coating Location |
Outer ring as standard. Inner ring coating available. |
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Cage Material |
Machined Brass (Standard), Stamped Steel, Polyamide |
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Internal Clearance |
C3 (Standard), C4, CN (On request) |
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Sealing Options |
Open (Standard), Metal Shields (ZZ), Rubber Seals (2RS) |
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Breakdown Voltage |
Standard: 1000V DC. Enhanced: Up to 3000V DC |
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Electrical Resistance |
Typically >50 MΩ (at Room Temperature) |
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Coating Material |
High-grade aluminum oxide (Al2O3) ceramic, Plasma Sprayed |
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Coating Thickness |
100 µm - 500 µm (Typical). Custom thicknesses offered. |
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Coating Hardness |
>1100 HV. |
|
Operating Temperature |
-40°C to +150°C (-40°F to +302°F) |
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Standards Compliance |
Manufactured under ISO 9001. Conforms to ISO 492 for dimensions. Electrical insulation tested per IEC 60064 and other relevant industry standards, ensuring superior performance. |
|
Custom Solutions |
We offer custom designs for specific insulation levels or sizes. Re-coating and modification services for existing bearings are also available. |
Key Features & Benefits
Model Numbers
Total 2 Results
Typical Applications
High-Speed Rail Traction Motors
Traction motors in high-speed trains operate under demanding conditions. High-speed rotation, frequent starts and stops, and stray currents from the power system all place extremely high demands on bearings. Electrical corrosion is one of the primary causes of bearing failure in traction motors, severely impacting train operational safety and punctuality.
Key Benefits
- Ensures Train Operational Safety
- Extends Maintenance Cycles
- Reduces Operating Costs
Large Industrial Motors and Generators
In large industrial sectors such as steel, chemical, and power generation, various large motors used to drive pumps, fans, compressors, and those functioning as generators also face the risk of current penetration through their bearings. These motors often have high power ratings and operate continuously for long periods. Should a bearing fail due to electrical corrosion, it can lead to costly downtime losses and maintenance expenses.
Key Benefits
- Increases Equipment Uptime
- Reduces Unplanned Downtime Losses
- Simplifies Maintenance Procedures
General FAQ
Find quick answers to common inquiries about our technology, product compatibility, and ordering process.
How does TFL's customized insulation coating service for bearings work? Can I send my existing bearings to TFL for insulation treatment?
Yes, this is a unique and highly valuable service from TFL! If you have already purchased bearings, regardless of brand or model, you can send them to us as long as they meet our process requirements. Our professional team will:
- Assessment: Conduct an initial assessment of your bearings to confirm their suitability for insulation coating.
- Cleaning & Pre-treatment: Perform thorough cleaning and professional pre-treatment on the bearing surfaces to ensure strong adhesion of the coating.
- Precision Spraying: Utilize TFL's advanced insulation spray technology to uniformly apply a high-performance insulation coating to the designated bearing surface (usually the outer or inner ring).
- Curing & Testing: The coating undergoes a strict curing process and 100% insulation performance testing to ensure it meets factory standards.
- Packaging & Shipping: The processed bearings will be professionally packaged and shipped back to you.
This service helps you quickly obtain the required electrically insulated bearings, especially suitable for urgent projects, small batch requirements, or situations where specific bearings need insulation treatment, greatly enhancing flexibility and cost-effectiveness.
Are TFL electrically insulated bearings available in a wide range of sizes and types to meet my equipment needs?
Yes, TFL offers electrically insulated deep groove ball bearings in standard sizes and models, capable of covering the needs of mainstream equipment on the market. Furthermore, as mentioned above, our strong customization capabilities mean that even for special sizes or non-standard applications, we can meet your specific requirements through our customized insulation coating service. Please contact our sales team with your specifications, and we will provide you with a professional matching solution.
What are the advantages of TFL electrically insulated bearings compared to well-known brands (like SKF) on the market? Why should I choose TFL?
TFL Bearings possesses deep expertise and production experience in electrical insulation technology. Our electrically insulated bearings are designed, manufactured, and use materials that meet high international standards, making them fully capable of replacing and competing with electrically insulated bearings from international renowned brands like SKF. By choosing TFL, you will benefit from:
- Exceptional Cost-Effectiveness: While delivering equivalent or even superior performance, we are committed to offering you more competitive pricing.
- Reliable Product Quality: We strictly adhere to our quality management system, ensuring the excellent quality and stability of every bearing set.
- Flexible Customization Services: In addition to standard products, we also offer custom insulation coating services for existing bearings. Regardless of the brand of bearing you need to insulate, we can meet your requirements and provide a tailored solution.
What types of insulation coatings does TFL offer, and what are their characteristics?
TFL provides a variety of high-performance insulation coating solutions to adapt to different application environments and performance requirements. Our common insulation coatings include:
- Aluminum Oxide Ceramic Coating (typically TFL's default solution): This is the most commonly used and excellent insulating material, featuring high dielectric strength, good wear resistance, and corrosion resistance. Our ceramic coatings are optimized to ensure excellent adhesion to the bearing substrate.
- Other Composite Insulation Coatings: Based on specific customer needs, we can also provide composite insulation coatings optimized for particular environments (e.g., higher temperatures, special chemical media) to offer more comprehensive protection.
Regardless of the coating type, TFL is committed to ensuring the stable and long-lasting electrical insulation performance of its products.
