Koyo Seiko Co., Ltd. and Toyoda Machine Works, Ltd. merged on January 1, 2006, and have made a new start as JTEKT Corporation. As a company centered on the automotive parts business that possesses a firm technological base cultivated through long years of bearing and machine tool manufacturing, JTEKT will aim to win the further trust and high expectations of customers and society.

Koyo Load & Speed Ratings


  • Maximum Allowable Pure Thrust Load – 40 Degree Ang
  • Maximum Radial Load KOYO CRB
  • Maximum Radial Load – Koyo Deep Groove Radial
  • Maximum Thrust Capacity 29000 Series
  • Minimum Axial Load 29000 Series
  • Minimum Radial To Avoid Skewing Koyo CRB’S
  • Radial Limiting Speeds
  • Speed Limits Ceramic Hybrids
  • Koyo Single ACB Thrust Loads
  • Koyo Double ACB Thrust Loads
  • Koyo Triple ACB Thrust Loads
  • Koyo Quad ACB Thrust Loads

 Koyo Technical Information

  • Bearing Failures & Countermeasures
  • 29000 Series: Shaft & Housing Fits
  • Tapered Roller Fitting