TFL Electrically Insulated Single Row Cylindrical Roller Bearings
TFL Electrically Insulated Single Row Cylindrical Roller Bearings feature a special insulating coating applied to either the inner or outer ring. This coating acts as a barrier, preventing damaging electrical currents from passing through the bearing’s rolling elements and raceways. By stopping these currents, TFL insulated bearings safeguard the lubricant and metal surfaces from pitting and premature wear. This significantly extends the service life of your equipment. TFL is committed to delivering robust and reliable electrically insulated bearing solutions.
TFL Leading Insulation Coating Technology
TFL Electrically Insulated Bearings feature an advanced plasma-sprayed ceramic coating applied to the inner or outer ring. This 100μm-thick insulating layer provides excellent electrical resistance, withstanding up to 1000V DC and preventing electrical currents from passing through the bearing components.
The coating is designed for strong adhesion, moisture resistance, and corrosion protection, ensuring long-term reliability even in harsh conditions such as high humidity, heat, and vibration.
Compared to conventional insulation materials like resin or varnish, TFL’s ceramic coating is far more durable, stable, and resistant to aging or flaking, making it a superior choice for industrial electric applications.
Advantages in Motor Systems
Electrical damage caused by current leakage is a common problem in modern motor systems, especially with inverter-driven motors. These damages may include fluting on raceways, grease degradation, and increased noise levels.
TFL Electrically Insulated Bearings effectively prevent this damage by applying high-resistance ceramic coatings to either the inner or outer ring, which block the flow of electrical currents through the bearing.
TFL bearings are ideal for high-power motors, generators, wind turbines, rail transit equipment, and air compressors, offering superior protection and longer service life.
Compared to other insulation methods like shaft or housing insulation, TFL bearings are more compact, easier to install, and more cost-effective, while delivering excellent mechanical and thermal performance for stable long-term operation.
Compatibility and Performance Consistency
TFL insulated bearings maintain identical dimensions, tolerances, and installation methods as standard bearings. This allows users to upgrade or replace bearings without any design modification.
TFL bearings comply with ISO standards and are available in a wide range of sizes, cage materials (brass, steel, glass-fiber reinforced nylon), and can be customized for specific voltage requirements beyond 1000V. This ensures maximum design flexibility and consistent system performance for engineers working on electric drive or inverter-based solutions.
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FREQUENTLY ASKED QUESTIONS
How do TFL Electrically Insulated Bearings achieve their insulation?
TFL Electrically Insulated Bearings utilize a special ceramic or oxide ceramic coating. This coating, typically applied to the outer ring, is created using a plasma spraying process. This ensures a durable, uniform layer that can withstand high voltages, effectively preventing current flow through the bearing.
What are the typical applications for TFL Electrically Insulated Cylindrical Roller Bearings?
TFL Electrically Insulated Cylindrical Roller Bearings are primarily used in electric motors, generators, and in railway traction motors. They are especially beneficial in applications with variable frequency drives (VFDs) where shaft voltages and stray currents are common. Using TFL insulated bearings in these applications significantly increases reliability and extends the lifespan of the equipment.
What are the advantages of TFL insulated bearings over conventional bearings?
TFL bearings feature an extra insulation layer to prevent electric current damage, unlike standard bearings. They are compact, easy to install, and reduce maintenance costs, improving motor system reliability.
What is the lifespan of the insulation coating? Does it require regular replacement?
TFL’s ceramic coating is made with high-adhesion materials and is maintenance-free for the life of the bearing, even in harsh environments. It is a long-lasting, cost-effective solution.