Tough and Long Life (TL) Spherical Roller Bearings

NSK’s TL spherical roller bearings deliver high strength resistance to hoop stress and inner ring cracking that frequently occurs due to rapid temperature rise in paper machine dryer cylinders. Through advanced material and carbonitriding technologies, bearing failure incidents, machine downtime and maintenance costs are significantly reduced.

Tough and Long Life (TL) Spherical Roller Bearings

Design Features

  • Optimized, high-capacity internal design
  • Inner rings manufactured with proprietary TL alloy composition and carbonitriding process
  • With cylindrical and tapered bore
  • With heavy-duty machined brass cage; pressed steel cages with wear-resistant surface treatment utilized for a limited range, or available on request
  • Radial internal clearances C-normal, C3, C4 and C5
  • Dimension series 222, 223, 230, 231, 232, 239, 240 and 241
  • For shaft diameters ranging from 40 to 1000 mm

Operating Benefits

  • Exceptional ring fracture resistance from high compressive residual stress after heat treatment
  • Long-life wear resistance due to superior surface hardness values, exceeding conventional through hardened and carburized materials
  • Dramatically reduced incidents of bearing failure translate into extended uptime, reduced maintenance costs and increased machine throughput
  • High temperature dimensional stability: up to 200° C

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