6310-M bearing: complete specifications & equivalents
The 6310-M is a ISO 15 radial bearing sized 50 x 110 x 27 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 50 mm |
| Outer diameter D | 110 mm |
| Width B | 27 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 65 kN |
| Basic static load rating C0 | 38 kN |
| Fatigue load limit Pu | 1.6 kN |
| Reference speed (thermal) | 13000 rpm |
| Limiting speed (mechanical) | 8500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1300 g |
| Manufacturer designation | 6310 M |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-27 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-27
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018)); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.
Dimensions in inches & 6300-series range
| Bore d | 1.969 in |
|---|---|
| Outer diameter D | 4.331 in |
| Width B | 1.063 in |
| ISO bore code | 10 |
| Radial section height (D−d)/2 | 30 mm |
| Smallest bore in 6300-series | 2 mm |
| Largest outer diameter in 6300-series | 500 mm |
| Width range across 6300-series | 3–95 mm |
| Bore position in 6300-series (smallest first) | 17 of 40 |
| Bore above smallest 6300-series size | 48 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6310-RSR | NSK | full Dimensions and internal design equivalent — standard interchange. | NSK counterpart NSK 6310VV on the same 50×110×27 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 310 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×110×27 mm envelope as SKF 310, but catalogue C/C0 differ (65/38 kN vs 64.4/52 kN) — envelope match only after a load check. |
| 310-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×110×27 mm envelope as SKF 310-2Z, but catalogue C/C0 differ (65/38 kN vs 64.4/52 kN) — envelope match only after a load check. |
| 6310 | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6310 (open arrangement) shares the 50×110×27 mm envelope with ratings within 10 % — execution variant of the same size; boundary dimensions interchangeable. |
| 6310-ZZ | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6310-2Z (two non-contact shields) shares the 50×110×27 mm envelope with ratings within 10 % — execution variant of the same size; boundary dimensions interchangeable. |
| 6310-2RS | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6310-2RSH (two contact elastomer seals) shares the 50×110×27 mm envelope with ratings within 10 % — execution variant of the same size; boundary dimensions interchangeable. |
Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the 6310-M model number is decoded
In the 6300-series, the last two digits encode the bore: 6310 carries code 10 = 50 mm (code × 5). The envelope is 50×110×27 mm (1.969×4.331×1.063 in) with a 30.0 mm radial section height, C 65 kN, C0 38 kN and Pu 1.6 kN. The open 6310 M carries no shields or seals and relies on application lubrication and external sealing. The M suffix identifies the machined brass cage execution, a separate order number from the pressed-steel version. Limiting speed 8500 r/min, catalogue mass 1300 g.
Typical equipment & failure modes
Common applications
- machine tool auxiliaries
- agricultural gearboxes
- industrial electric motors
- gearboxes and speed reducers
Known failure patterns
- contamination wear when the open arrangement is used without external seals
- lubricant starvation where no regreasing interval is maintained
- fretting corrosion on a creeping shaft or housing seat
- cage damage from running beyond the limiting speed
Selection pitfalls — read before you substitute
- Deep-groove geometry tolerates only minutes of misalignment; if the 110 mm housing bore cannot be aligned, move to a self-aligning bearing rather than shimming 6310-M.
- Assign interference to the rotating ring: on a conventional shaft-mounted 50 mm position the inner ring rotates, so use a k5/m6 shaft seat with an H7 housing — reverse the logic if the outer ring rotates.
- The M suffix on 6310-M denotes a machined brass cage: it is the choice for high speeds, marginal lubrication and shock/vibration duty, and it is temperature-tolerant where polymer cages are not — the 1300 g quoted mass includes the heavier cage.
- Open 6310-M needs external sealing at the arrangement level; in dusty housings its life depends entirely on those external seals and the regreasing schedule.
- Plan a relubrication interval for 6310-M; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- Deep-groove geometry tolerates only minutes of misalignment; if the 110 mm housing bore cannot be aligned, move to a self-aligning bearing rather than shimming 6310-M.
Frequently asked questions
What are the dimensions of 6310-M?
The SKF 6310 M measures 50 mm bore × 110 mm OD × 27 mm width (1.969 × 4.331 × 1.063 in), mass about 1300 g. It is open, with no shields or seals.
How does the bore code in 6310 work?
The final two digits of 6310 are bore code 10, multiplied by 5 to give 50 mm.
What load can 6310-M take?
Catalogue values for 6310 M: dynamic C 65 kN, static C0 38 kN, fatigue limit Pu 1.6 kN. Use C in life calculation and C0 for static checks at 50 mm bore.
What is the speed rating of 6310-M?
SKF lists a 13000 r/min thermal reference speed and a 8500 r/min mechanical limiting speed for 6310 M; real limits also depend on lubrication and fits.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-27. Read our editorial & correction policy.