| Symbol | Value | Description |
|---|---|---|
| ≈m | 1.251 kg | Weight |
| Cr | 142000 N | Basic dynamic load rating, radial |
| C0r | 134000 N | Basic static load rating, radial |
| nϑr | 5400 rpm | Reference speed |
| nG | 7600 rpm | Limiting speed |

NTN
Spherical Roller Bearing
RFQ
Estimated delivery: 18 Jul 2026 (domestic stock)
EX-WORKS (Incoterms 2020) Seoul, Korea — Buyer arranges freight, duties, and insurance.
NTN 21310C Spherical Roller Bearing is a heavy-duty bearing that tolerates shaft misalignment and deflection through spherical raceways and barrel-shaped rollers. It supports high radial load and axial load in both directions, making it suitable for mining, steel, paper, wind, and other shock-prone equipment.
The outer ring has a spherical raceway, while the inner ring carries two rows of rollers guided by a cage. This self-aligning structure compensates for minor shaft and housing misalignment during operation.
Review load, speed, misalignment, lubrication method, bore type, and adapter sleeve requirements before selection.
| Symbol | Value | Description |
|---|---|---|
| ≈m | 1.251 kg | Weight |
| Cr | 142000 N | Basic dynamic load rating, radial |
| C0r | 134000 N | Basic static load rating, radial |
| nϑr | 5400 rpm | Reference speed |
| nG | 7600 rpm | Limiting speed |
| Symbol | Value | Description |
|---|---|---|
| d | 50 mm | Bore diameter |
| D | 110 mm | Outside diameter |
| B | 27 mm | Width |
| Symbol | Value | Description |
|---|---|---|
| Tmin | -40 °C | Operating temperature min. |
| Tmax | 200 °C | Operating temperature max. |
| Code | Description |
|---|---|
| CN | Radial clearance group |
| Cylindrique | Bore type |
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:
NTN21310CNTN 21310CRFQ
Estimated delivery: 18 Jul 2026 (domestic stock)

NSK
1222K
Self-Aligning Ball Bearing
This product is quote-only — please send an inquiry for pricing and availability.

NSK
1220K
Self-Aligning Ball Bearing
This product is quote-only — please send an inquiry for pricing and availability.

NSK
1320K
Self-Aligning Ball Bearing
This product is quote-only — please send an inquiry for pricing and availability.

NSK
16038M
Deep Groove Ball Bearing
This product is quote-only — please send an inquiry for pricing and availability.

NSK
16032M
Deep Groove Ball Bearing
This product is quote-only — please send an inquiry for pricing and availability.

NSK
1319K
Self-Aligning Ball Bearing
This product is quote-only — please send an inquiry for pricing and availability.

NSK
21306CDE4
Spherical Roller Bearing
This product is quote-only — please send an inquiry for pricing and availability.

NSK
21308EAE4C3
Spherical Roller Bearing
This product is quote-only — please send an inquiry for pricing and availability.