2310-E-2RS1KTN9 bearing: complete specifications & equivalents
The 2310-E-2RS1KTN9 is a ISO 15 radial bearing sized 50 x 110 x 40 mm (bore x OD x width) with 2RS sealing. 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 | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 43.6 kN |
| Basic static load rating C0 | 14 kN |
| Fatigue load limit Pu | 0.72 kN |
| Limiting speed (mechanical) | 4000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1650 g |
| Manufacturer designation | 2310 E-2RS1KTN9 |
| 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 | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×110×40 mm envelope per ISO 15; seal variant (2RS vs OPEN) and load ratings differ — confirm sealing and rating before substituting. |
| 2310-E-2RS1TN9 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 50×110×40 mm envelope with catalogue ratings within 10 %; 2310 E-2RS1TN9 is the glass-fibre PA66 cage, two contact elastomer seals execution of this size — boundary dimensions interchangeable, only the seal/cage/bore execution differs. |
| 2310-K | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×110×40 mm envelope, but catalogue C/C0 differ between executions (43.6/14 kN vs 63.7/20 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-E-2RS1KTN9 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 43.6 kN, C0 14 kN and Pu 0.72 kN. SKF spells the sealed execution 2310 E-2RS1KTN9 (suffix 2RS1): two contact elastomer lips over a lifetime grease fill; the lips add drag, and no thermal reference speed is published. The E-2RS1KTN9 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. Limiting speed 4000 r/min, catalogue mass 1650 g.
Typical equipment & failure modes
Common applications
- textile machinery drives
- industrial fans and blowers
- woodworking machinery
- pump shafts with mild misalignment
Known failure patterns
- fine dust or moisture passing a worn seal lip in dirty or wet duty
- grease loss when the sealed-for-life cavity is overheated with no relubrication path
- 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
- excessive misalignment loading one ball row heavily and spalling it early
- rolling-contact fatigue spalling once the catalogue L10 life is exceeded
Selection pitfalls — read before you substitute
- The fatigue load limit is 0.72 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
- The spherical outer raceway lets 2310-E-2RS1KTN9 tolerate shaft deflection, but it does not increase thrust capacity — combined loads still need an angular-contact or deep-groove bearing.
- Sealed self-aligning bearings tolerate less misalignment than open ones: keep static misalignment under roughly 1° on 2310-E-2RS1KTN9 to avoid seal-lip binding.
- The K suffix means a 1:12 tapered bore: 2310-E-2RS1KTN9 is not a drop-in for the straight-bore version — it needs a tapered shaft or an H-series adapter sleeve.
- The E-2RS1KTN9 suffix on 2310-E-2RS1KTN9 denotes a glass-fibre-reinforced polyamide 66 cage: quiet and light at the 4000 r/min limiting speed, but it softens above roughly 120 °C — check the oil temperature in hot drives.
- Fillet radii must clear the 2310-E-2RS1KTN9 chamfer so the 40 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
Frequently asked questions
What are the dimensions of 2310-E-2RS1KTN9?
SKF 2310 E-2RS1KTN9 measures 50 mm bore × 110 mm OD × 40 mm width (1.969 × 4.331 × 1.575 in), mass about 1650 g. It has two contact rubber seals (2RS1) and a lifetime grease fill.
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.
How heavy is 2310-E-2RS1KTN9?
Catalogue mass is 1650 g for 2310 E-2RS1KTN9; seal and cage executions of the same envelope differ by a few grams.
What load can 2310-E-2RS1KTN9 take?
Catalogue values for 2310 E-2RS1KTN9: dynamic C 43.6 kN, static C0 14 kN, fatigue limit Pu 0.72 kN. Use C in life calculation and C0 for static checks at 50 mm bore.
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.