Super-TF Tapered Roller Bearings for Gearboxes

Wind turbine drivetrain components are subjected to immense and adverse operating challenges: heavy dynamic and impact loads, rapid accelerations and decelerations of gearbox shafts, system-wide lubrication challenges, and potentially harsh environmental conditions. NSK’s Super-TF (STF) tapered roller bearings for gearboxes possess inherently higher material strength to deliver superior resistance to wear, seizure, and the propagation of surface and subsurface bearing damage.

Design Features

Bearing rings are manufactured with long-life Super-TF alloy composition and carbonitriding process
Bearing rings and roller surfaces are treated with black oxide coating (BOC)
For planetary carriers: large-size, dimensionally specialized single row bearings in metric and inch dimensions
For low-speed intermediate shafts: double row bearings with normal contact angle (KH design) or with steep angle races (KDH design) for increased axial load capacity
For high-speed intermediate shafts, high-speed shafts and low-speed intermediate shafts: duplex bearings in symmetrical or major/minor arrangements

Operating Benefits

Higher reliability and longer operating life with Super-TF steel, reducing bearing replacement and maintenance intervals
Higher load capacity derived from optimized internal design, as much as 35% greater than conventional sealed bearings
Sealed-clean solution extends bearing performance exponentially, significantly reducing grease consumption and corresponding maintenance costs / downtime
Sealed bearings promote a cleaner work environment