2315-K bearing: complete specifications & equivalents
The 2315-K is a ISO 15 radial bearing sized 75 x 160 x 55 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 75 mm |
| Outer diameter D | 160 mm |
| Width B | 55 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 124 kN |
| Basic static load rating C0 | 43 kN |
| Fatigue load limit Pu | 2.04 kN |
| Reference speed (thermal) | 7500 rpm |
| Limiting speed (mechanical) | 5600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 4700 g |
| Manufacturer designation | 2315 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 | 2.953 in |
|---|---|
| Outer diameter D | 6.299 in |
| Width B | 2.165 in |
| ISO bore code | 15 |
| Radial section height (D−d)/2 | 42.5 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) | 16 of 21 |
| Bore above smallest 2300-series size | 65 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 2315 | 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. |
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 2315-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: 2315 carries code 15 = 75 mm (code × 5). Envelope 75×160×55 mm (2.953×6.299×2.165 in) with a 42.5 mm radial section height, C 124 kN, C0 43 kN and Pu 2.04 kN. The open 2315 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 7500 r/min, limiting speed 5600 r/min, catalogue mass 4700 g.
Typical equipment & failure modes
Common applications
- textile machinery drives
- industrial fans and blowers
- woodworking machinery
- pump shafts with mild misalignment
Known failure patterns
- contamination wear when the open arrangement is used without adequate external sealing
- lubricant starvation where no regreasing interval is maintained
- adapter-sleeve fretting when the sleeve is not locked against the shaft shoulder
- incorrect sleeve tightening that leaves the tapered bore loose or over-expanded, changing internal clearance
- brinelling from static overload or hammer blows during mounting
- false brinelling from vibration while the shaft stands idle
Selection pitfalls — read before you substitute
- The spherical outer raceway lets 2315-K tolerate shaft deflection, but it does not increase thrust capacity — combined loads still need an angular-contact or deep-groove bearing.
- The spherical outer raceway lets 2315-K tolerate shaft deflection, but it does not increase thrust capacity — combined loads still need an angular-contact or deep-groove bearing.
- On a sleeve-mounted 2315-K, lock the sleeve against the shaft shoulder; a loose sleeve creeps and frets both the shaft and the bore.
- The suffix on 2315-K denotes a glass-fibre-reinforced polyamide 66 cage: quiet and light at the 5600 r/min limiting speed, but it softens above roughly 120 °C — check the oil temperature in hot drives.
- Catalogue ratings for 2315-K (C 124 kN, C0 43 kN) are SKF figures from PUB BU/P1 17000; geometry revisions can change ratings without changing the designation, so keep the catalogue edition with the specification.
- Mount 2315-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.
Frequently asked questions
What are the dimensions of 2315-K?
SKF 2315 K measures 75 mm bore × 160 mm OD × 55 mm width (2.953 × 6.299 × 2.165 in), mass about 4700 g. It is open, with no shields or seals.
How does the bore code in 2315 work?
The final two digits of 2315 are bore code 15, multiplied by 5 to give 75 mm.
What is the speed rating of 2315-K?
SKF lists a 7500 r/min thermal reference speed and a 5600 r/min mechanical limiting speed for 2315 K; real limits also depend on lubrication and fits.
How much misalignment can 2315-K tolerate?
Self-aligning ball bearings tolerate roughly 2–3° of static misalignment for open executions; sealed 2RS1 variants like 2315-K allow less (about 1°) because the seal lip binds first.
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.