| Symbol | Value | Description |
|---|---|---|
| ≈m | 0.642 kg | Weight |
| Cr | 44000 N | Basic dynamic load rating, radial |
| C0r | 11300 N | Basic static load rating, radial |

NSK
Self-Aligning Ball Bearing
RFQ
Estimated delivery: 26 Jul 2026 (overseas stock, ~4 weeks)
EX-WORKS (Incoterms 2020) Seoul, Korea — Buyer arranges freight, duties, and insurance.
NSK 2307K Self-Aligning Ball Bearing uses two rows of balls and a spherical outer ring raceway to compensate for shaft misalignment. It provides low-friction rotation in fans, conveyors, textile machines, and long-shaft arrangements with mounting or housing deviations.
Two rows of balls are guided by a cage on the inner ring, while the outer ring has a spherical raceway. The design absorbs angular misalignment between shaft and housing while maintaining low friction at moderate to high speeds.
Check expected misalignment, load, sealing needs, internal clearance, and available mounting space.
| Symbol | Value | Description |
|---|---|---|
| ≈m | 0.642 kg | Weight |
| Cr | 44000 N | Basic dynamic load rating, radial |
| C0r | 11300 N | Basic static load rating, radial |
| Symbol | Value | Description |
|---|---|---|
| d | 35 mm | Bore diameter |
| D | 80 mm | Outside diameter |
| B | 31 mm | Width |
| Code | Description |
|---|---|
| Standard bearing steel | Material |
| Sheet steel cage | Cage |
| Tolerance class P0/PN2 / ABEC 1 | Tolerance class |
The same part number can be written with or without separators, or in progressive prefix form. We index these common variants so your search reaches this page:
NSK2307KNSK 2307KRFQ
Estimated delivery: 26 Jul 2026 (overseas stock, ~4 weeks)

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