2303-E-2RS1TN9 bearing: complete specifications & equivalents
The 2303-E-2RS1TN9 is a ISO 15 radial bearing sized 17 x 47 x 19 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 | 17 mm |
| Outer diameter D | 47 mm |
| Width B | 19 mm |
| Material | GCr15 |
| Seal / shield | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 12.7 kN |
| Basic static load rating C0 | 3.4 kN |
| Fatigue load limit Pu | 0.18 kN |
| Limiting speed (mechanical) | 11000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 160 g |
| Manufacturer designation | 2303 E-2RS1TN9 |
| 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 | 0.669 in |
|---|---|
| Outer diameter D | 1.85 in |
| Width B | 0.748 in |
| ISO bore code | 03 |
| Radial section height (D−d)/2 | 15 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) | 4 of 21 |
| Bore above smallest 2300-series size | 7 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 2303 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | NTN bearing 2303S on the same 17×47×19 mm envelope, but catalogue C/C0 differ (12.7/3.4 kN vs 14.7/3.55 kN) — envelope interchange only after a load check. |
| 2303-M | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 17×47×19 mm envelope, but catalogue C/C0 differ between executions (12.7/3.4 kN vs 14.3/3.55 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 2303-E-2RS1TN9 model number is decoded
The 23xx series is the wide medium-section self-aligning ball bearing (ISO dimension series 23). bore code 03 follows the 10/12/15/17 mm exception table, so 2303 fits a 17 mm shaft. Envelope 17×47×19 mm (0.669×1.85×0.748 in) with a 15.0 mm radial section height, C 12.7 kN, C0 3.4 kN and Pu 0.18 kN. SKF spells the sealed execution 2303 E-2RS1TN9 (suffix 2RS1): two contact elastomer lips over a lifetime grease fill; the lips add drag, and no thermal reference speed is published. The E-2RS1TN9 suffix identifies the glass-fibre-reinforced polyamide 66 cage execution. The bore is cylindrical (straight), for a press-fit on a 17 mm shaft. Limiting speed 11000 r/min, catalogue mass 160 g.
Typical equipment & failure modes
Common applications
- light gearbox layshafts
- food-processing conveyors
- small electric motors
- conveyor idler rollers
Known failure patterns
- contact-seal lip hardening and grease-life expiry after long high-temperature service
- fine dust or moisture passing a worn seal lip in dirty or wet duty
- electrical pitting in VFD-driven motors without shaft grounding
- excessive misalignment loading one ball row heavily and spalling it early
Selection pitfalls — read before you substitute
- Mount 2303-E-2RS1TN9 by heating the inner ring (max 120 °C) on a cylindrical bore — driving it home through the outer ring or balls brinells the raceways.
- Assign interference to the rotating ring: on a 17 mm rotating shaft use a j5/k5 seat with an H7 housing; reverse the logic if the outer ring rotates.
- Sealed self-aligning bearings tolerate less misalignment than open ones: keep static misalignment under roughly 1° on 2303-E-2RS1TN9 to avoid seal-lip binding.
- The E-2RS1TN9 suffix on 2303-E-2RS1TN9 denotes a glass-fibre-reinforced polyamide 66 cage: quiet and light at the 11000 r/min limiting speed, but it softens above roughly 120 °C — check the oil temperature in hot drives.
- At 17 mm bore, C3 clearance is the safe choice when interference fits plus temperature rise consume the CN clearance; a hot tight bearing with no residual clearance fails fast.
- The spherical outer raceway lets 2303-E-2RS1TN9 tolerate shaft deflection, but it does not increase thrust capacity — combined loads still need an angular-contact or deep-groove bearing.
Frequently asked questions
What are the dimensions of 2303-E-2RS1TN9?
SKF 2303 E-2RS1TN9 measures 17 mm bore × 47 mm OD × 19 mm width (0.669 × 1.85 × 0.748 in), mass about 160 g. It has two contact rubber seals (2RS1) and a lifetime grease fill.
How does the bore code in 2303 work?
Codes 00–03 follow the exception table (10, 12, 15, 17 mm): 2303 fits a 17 mm shaft. Code × 5 starts at code 04.
How much misalignment can 2303-E-2RS1TN9 tolerate?
Self-aligning ball bearings tolerate roughly 2–3° of static misalignment for open executions; sealed 2RS1 variants like 2303-E-2RS1TN9 allow less (about 1°) because the seal lip binds first.
Can 2303-E-2RS1TN9 take axial load?
A self-aligning ball bearing can carry some axial load in addition to radial load, but its axial capacity is lower than an angular-contact bearing of the same envelope. Use it where misalignment, not thrust, is the main requirement.
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.