ABOUT US
Over 100 years have passed since the founding of Koyo Seiko, the company that would later become JTEKT.
Throughout its long history, the Koyo bearing brand has continuously evolved while supporting a broad range of industries around the world for decades.
Even after becoming part of JTEKT, Koyo continues to uphold its reputation as a global bearing brand, earning enduring trust and recognition both domestically and internationally.
PRODUCTS
Bearings are sometimes referred to as the "rice of the machinery industry."
This is because bearings are indispensable components used in virtually all rotating machinery, including automobiles, home appliances, and aircraft,
making them a critically important part that supports the very foundation of Japan's industries.
As a comprehensive bearing manufacturer, JTEKT will continue to support comfortable lifestyles and global manufacturing through its long-established technologies and extensive product lineup.
HISTORY
The history of Koyo began in 1921, when bearing production was first launched.
In 1935, the company was reorganized as a corporation, leading to the establishment of Koyo Seiko Co., Ltd., which laid the foundation for the Koyo brand as we know it today.
Former Headquarters (1941-1945)
3 Unagidani Nishino-cho, Minami-ku, Osaka, Japan
- To "Koyo", a leading Japanese bearing manufacturer.
- Development of "Koyo" products suited to diverse applications
- Evolution into JTEKT’s Bearing Brand "Koyo"
1.To "Koyo", a leading Japanese bearing manufacturer.
- Founded as Koyo Seiko Co. (brand name "IKF")
Beginning of full bearing production
- Full production of double-row ball bearings and tapered roller bearings began
- Production and sale of Koyo sawing machine (later rolling bearings) began
- Four-row tapered roller bearings for rolling mill work rolls developed
- Four-row tapered roller bearings for rolling mill backup rolls developed
- Developed water pump bearings
- Mass production of cylindrical roller bearings for multi-roll mill backup rolls began
- Development of bearings for the Shinkansen bullet train, high-speed train-cars began
- Registered trade mark changed from IKF to Koyo
- Production of tapered roller bearings (HI-CAP) began
- Production of drive shafts for construction machinery began
- Four-row cylindrical roller bearings for rolling mill backup rolls developed
2.Development of "Koyo" products suited to diverse applications
- Developed Ball bearings under vacuum conditions
- Ball bearings for high-speed alternator developed
- Low-friction torque tapered roller bearings (LFT®) developed
- The 2nd generation ball hub unit bearings developed
- Ceramic bearings developed
- Split type bearing unit for continuous casting equipments developed
- Hub unit bearings with built-in ABS sensors developed
- Delivered ultra-large size slewing rim bearings (7.2m diameter) for the tunnel-boring machine for the Tokyo Bay Aqua Line
- Koyo Extra-life (KE) bearings developed
- Clean Pro bearings for semiconductor manufacturing equipment developed
- Ceramic bearings for turbochargers developed
- Delivered tapered roller bearings for the Shinkansen bullet train( N500 series)
- Tapered roller bearings for N700 Series Shinkansen bullet train delivered
- Delivered quarter-split type ultra-large size (8.37m) slewing rim bearings
- Developed High Ability Angular Contact Ball Bearings for machine tool spindles
- Clutch pulley for alternator developed
3.Evolution into JTEKT’s Bearing Brand "Koyo"
- JTEKT Corporation founded
- Developed long-life needle roller bearings for planetary gears
- Developed Low-friction torque tapered roller bearings (LFT®-III)
- Developed large-size insulated ceramic bearings for wind power generators
- Long-life & high-corrosion resistant roll neck bearings for rolling mills developed
- Developed excessive-torque protectors for steel rolling mill driveshafts (hyper coupling)
- High-performance sealed cylindrical roller bearings for multi-roll mill backup rolls developed
- Ultra high-speed angular contact ball bearings that cope with high-speed rotation of 4,000,000 dmn developed
- Developed caged needle roller bearings for high speed planetary gears
- High-rotation speed ball bearings (with high-rigidity resin cage) developed
- Developed ultra thin section ball bearings (high load capacity type)
- Developed new Clean Pro bearings
- High-performance cylindrical roller bearings for multi-roll mill backup rolls developed
- Next-generation long-life bearings (NK bearing) developed
- Ultra-high precision bearings (PRECILENCE) developed
- Developed low-friction torque tapered roller bearings (LFT®-V)
- Developed bearings "EXSEV-H2" for hydrogen environments
- Ceramic bearings for turbochargers registered as "Essential Historical Materials for Science and Technology" by National Museum of Nature and Science
- Developed ultra-narrow bearing "JTEKT Ultra Compact Bearing™"
- Developed conductive bearing "JTEKT Ultra Earth Bearing™"
- Developed "High-Ability JFAST™" Bearings for Machine Tool Spindles
- Developed Integrated Gear Bearing "JIGB®"
- Developed Ultra-High-Speed Deep Groove Ball Bearings for eAxles
- Developed Grease-Lubricated Ceramic Ball Bearings for eAxles in High-Performance Electric Vehicles
- Tagline Established for JTEKT Bearing Brand "Koyo"
