6312 bearing
60 × 130 mm · dynamic rating 85.2 kN · static rating 52 kN. Dimensions, load ratings, designation meaning, life estimates and equivalent parts.
6312 specification
| Designation | 6312 |
| Type | Deep groove ball bearing |
| Series | 63 medium |
| Bore diameter d | 60 mm |
| Outside diameter D | 130 mm |
| Basic dynamic load rating C | 85.2 kN (85,200 N) |
| Basic static load rating C0 | 52 kN (52,000 N) |
| Ratio C0/C | 0.61 |
| Speed guide, grease lubrication | 7,000 rpm |
| Life exponent p | 3 (ball bearing) |
Values come from the Rotec AI bearing catalogue and are indicative. Confirm against the manufacturer's current catalogue before ordering. Not every dimension (such as width) is listed here.
What the designation 6312 means
| Code | Meaning |
|---|---|
| 63 | Deep groove ball bearing, medium dimension series |
| 12 | bore code "12" = 12 × 5 = 60 mm |
Basic rating life of the 6312
Basic rating life is L10 = (C / P)p million revolutions, where P is the equivalent dynamic load and p = 3 (ball bearing). For a 6312 with C = 85.2 kN, the table shows what that gives at different load levels. It is the ISO 281 basic life only: it does not include lubrication, contamination, misalignment or reliability modifiers.
| C / P | P as share of C | L10 (million rev) | L10 at 1,500 rpm | L10 at 3,000 rpm |
|---|---|---|---|---|
| 3 | 33.3% | 27 | 300 | 150 |
| 5 | 20.0% | 125 | 1,400 | 690 |
| 8 | 12.5% | 512 | 5,700 | 2,800 |
| 12 | 8.3% | 1,728 | 19,200 | 9,600 |
For example, a C / P of 5 means the equivalent load is 17.04 kN on this bearing. Use the Load Calculator to work out P for your actual radial and axial loads.
Equivalents of the 6312 from other brands
Deep groove ball bearings follow the ISO basic designation system, so the base number 6312 means the same bore (60 mm) and outside diameter (130 mm) at the major makers. Only the suffixes differ. For sealed versions, common suffixes are -2RS1 or -2Z at SKF, -2RSR or -2ZR at FAG, DDU or ZZ at NSK, and LLU or ZZ at NTN. Check clearance class, grease and seal type before substituting. Rotec AI has no brand-specific part numbers catalogued for the 6312 yet; the Cross-Reference tool shows what is catalogued for other sizes.
Where the 6312 is used
Deep-groove ball bearings are chosen for: Radial load with moderate axial load; high-speed compact equipment. Typical equipment: Motors, fans, pumps, gearboxes, auxiliaries. Single/multi-row; insulated or stainless variants available.
Other sizes in the same series
The 6312 is size 13 of 21 in the Rotec AI catalogue for the “63 medium” series. The next size down, the 6311, has a bore of 55 mm and a dynamic rating of 74.1 kN. The next size up, the 6313, has a bore of 65 mm and a rating of 97.5 kN (+14%).
Common problems on bearings like the 6312
Most field failures trace back to lubrication, contamination, fits and alignment rather than the bearing itself. These guides explain how to recognise and prevent them:
Questions about the 6312
What are the dimensions of a 6312 bearing?
The 6312 has a bore of 60 mm and an outside diameter of 130 mm. It is a deep groove ball bearing. Series: 63 medium.
What is the load rating of a 6312 bearing?
In the Rotec AI catalogue the 6312 has a basic dynamic load rating C of 85.2 kN and a basic static load rating C0 of 52 kN. Always confirm against the manufacturer's current catalogue.
What is the equivalent of a 6312 bearing?
Brand equivalents for the 6312 are not yet in the Rotec AI tables. Use the Cross-Reference tool to check other designations.