2310-K bearing: complete specifications & equivalents
The 2310-K is a ISO 15 radial bearing sized 50 x 110 x 40 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 | 40 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 63.7 kN |
| Basic static load rating C0 | 20 kN |
| Fatigue load limit Pu | 1.04 kN |
| Reference speed (thermal) | 14000 rpm |
| Limiting speed (mechanical) | 9500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1650 g |
| Manufacturer designation | 2310 K |
| 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 & 2300-series range
| Bore d | 1.969 in |
|---|---|
| Outer diameter D | 4.331 in |
| Width B | 1.575 in |
| ISO bore code | 10 |
| Radial section height (D−d)/2 | 30 mm |
| Smallest bore in 2300-series | 10 mm |
| Largest outer diameter in 2300-series | 215 mm |
| Width range across 2300-series | 17–73 mm |
| Bore position in 2300-series (smallest first) | 11 of 21 |
| Bore above smallest 2300-series size | 40 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 2310 | NTN | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
| 2310-E-2RS1TN9 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×110×40 mm envelope, but catalogue C/C0 differ between executions (63.7/20 kN vs 43.6/14 kN) — boundary dimensions match, not a load-rating equivalent. |
| 2310-E-2RS1KTN9 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×110×40 mm envelope, but catalogue C/C0 differ between executions (63.7/20 kN vs 43.6/14 kN) — boundary dimensions match, not a load-rating equivalent. |
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 2310-K model number is decoded
The 23xx series is the wide medium-section self-aligning ball bearing (ISO dimension series 23). the last two digits encode the bore: 2310 carries code 10 = 50 mm (code × 5). Envelope 50×110×40 mm (1.969×4.331×1.575 in) with a 30.0 mm radial section height, C 63.7 kN, C0 20 kN and Pu 1.04 kN. The open 2310 K carries no shields or seals and relies on application lubrication and external sealing. The suffix identifies the glass-fibre-reinforced polyamide 66 cage execution. The K suffix marks a 1:12 tapered bore for direct mounting on a tapered shaft or with an adapter sleeve. Reference (thermal) speed 14000 r/min, limiting speed 9500 r/min, catalogue mass 1650 g.
Typical equipment & failure modes
Common applications
- industrial electric motors
- conveyor drum and pulley shafts
- agricultural gearboxes
- textile machinery drives
Known failure patterns
- lubricant starvation where no regreasing interval is maintained
- contamination wear when the open arrangement is used without adequate external sealing
- incorrect sleeve tightening that leaves the tapered bore loose or over-expanded, changing internal clearance
- adapter-sleeve fretting when the sleeve is not locked against the shaft shoulder
- cage damage from running beyond the limiting speed
- raceway smearing under marginal lubrication at start-up
Selection pitfalls — read before you substitute
- Assign interference to the rotating ring: on a 50 mm rotating shaft use a k5 seat with an H7 housing; reverse the logic if the outer ring rotates.
- Mount 2310-K by heating the inner ring (max 120 °C) on a cylindrical bore — driving it home through the outer ring or balls brinells the raceways.
- Tighten the adapter sleeve to the SKF-recommended starting clearance, not to feel — an over-tightened sleeve expands the inner ring and removes all internal clearance.
- The suffix on 2310-K denotes a glass-fibre-reinforced polyamide 66 cage: quiet and light at the 9500 r/min limiting speed, but it softens above roughly 120 °C — check the oil temperature in hot drives.
- Fillet radii must clear the 2310-K chamfer so the 40 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
- Self-aligning ball bearings tolerate up to roughly 2–3° of static misalignment, but the sealed 2310-K (2RS1) allows less — the lip seal binds before the spherical raceway does.
Frequently asked questions
What are the dimensions of 2310-K?
SKF 2310 K measures 50 mm bore × 110 mm OD × 40 mm width (1.969 × 4.331 × 1.575 in), mass about 1650 g. It is open, with no shields or seals.
How does the bore code in 2310 work?
The final two digits of 2310 are bore code 10, multiplied by 5 to give 50 mm.
What load can 2310-K take?
Catalogue values for 2310 K: dynamic C 63.7 kN, static C0 20 kN, fatigue limit Pu 1.04 kN. Use C in life calculation and C0 for static checks at 50 mm bore.
What is the speed rating of 2310-K?
SKF lists a 14000 r/min thermal reference speed and a 9500 r/min mechanical limiting speed for 2310 K; 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.