NSK Bearings
Japan's first bearing manufacturer — founded 1916, one of the world's top three bearing makers.
NSK Ltd. (Nippon Seiko K.K.), founded in Tokyo in 1916, was Japan's first bearing manufacturer and remains one of the world's three largest, alongside SKF and Schaeffler. NSK is the de-facto standard for Japanese machine-tool spindles, automotive wheel hub units, ball screws and linear guides, wind-turbine main shafts, and clean-room semiconductor bearings. Kovar stocks NSK's 6000/6200/6300 deep groove, 7000 angular contact, wheel hub units, spherical roller and tapered roller ranges, with one-business-day quoting on precision grades (P5/P4) and clearance/lubrication options.
- Supply channel — traceable to NSK Japan
- 6000/6200/6300 ball + 7000 angular contact ranges in stock
- Precision (P5/P4) quotes within one business day
- Same-day shipping before 15:00 KST
- Support for machine-tool, robotics, semiconductor applications
Popular series
- Headquartered
- Japan
- Founded
- 1916
- Parent company
- NSK Ltd.
All NSK bearings
NSK FAQ
Where is NSK based?
NSK Ltd. (Nippon Seiko) is headquartered in Tokyo, Japan, with global manufacturing in Korea, China, the US, Europe and Southeast Asia. It was Japan's first bearing manufacturer (1916).
What is NSK known for?
Machine-tool spindle precision, automotive wheel hub units, ball screws and linear guides, wind-turbine main bearings, and semiconductor-grade clean bearings — strongholds across Japanese OEM supply.
How does NSK differ from NTN?
Both are top-tier Japanese makers. NSK is strongest in machine-tool precision and wind, NTN in automotive constant-velocity joints and general industrial rollers. The same nominal part number can carry different OEM-spec defaults.
How do NSK precision grades work?
ISO grades P0/P6/P5/P4/P2 — higher numbers = tighter tolerances. Industrial general use P0/P6, machine-tool spindles P5/P4, semiconductor/metrology P4/P2. Send grade, clearance and grease specs with your quote request.