62303-2RS bearing: complete specifications & equivalents
The 62303-2RS 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 | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 13.5 kN |
| Basic static load rating C0 | 6.55 kN |
| Fatigue load limit Pu | 0.275 kN |
| Limiting speed (mechanical) | 11000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 160 g |
| Manufacturer designation | 62303-2RS1 |
| 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 & 62300-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 62300-series | 10 mm |
| Largest outer diameter in 62300-series | 150 mm |
| Width range across 62300-series | 17–51 mm |
| Bore position in 62300-series (smallest first) | 4 of 15 |
| Bore above smallest 62300-series size | 7 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 4303-ATN9 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 17×47×19 mm envelope as SKF 4303 ATN9, but catalogue C/C0 differ (13.5/6.55 kN vs 19.5/13.2 kN) — envelope match only after a load check. |
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 62303-2RS model number is decoded
The 62300-series is the wide-section counterpart of the standard deep-groove family (extra width code built into the designation); bore code 03 follows the 10/12/15/17 mm exception table, so 62303 fits a 17 mm shaft. The envelope is 17×47×19 mm (0.669×1.85×0.748 in) with a 15.0 mm radial section height, C 13.5 kN, C0 6.55 kN and Pu 0.275 kN. SKF catalogues the sealed execution as 62303-2RS1: two contact elastomer lips (2RS1/2RSH spelling) over a lifetime grease fill; the lips add drag, and no reference (thermal) speed is published. Limiting speed 11000 r/min, catalogue mass 160 g.
Typical equipment & failure modes
Common applications
- small gearboxes
- conveyor drives
- fans and blowers
- agricultural equipment
Known failure patterns
- contact-seal lip hardening and pre-grease loss after long high-temperature service
- grease-life expiry inside the sealed-for-life cavity, which has no relubrication path
- cage damage from running beyond the limiting speed
- raceway smearing under marginal lubrication at start-up
Selection pitfalls — read before you substitute
- The fatigue load limit is 0.275 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
- Mount by heating the inner ring (max 120 °C) — driving 62303-2RS home through the outer ring or balls brinells the raceways.
- Contact seals make 62303-2RS slower than the open 62303 (limiting 11000 r/min) and forbid solvent washing, which destroys the lifetime grease.
- Do not pry the caps off 62303-2RS to repack it; shield/seal damage leaves a gap that throws grease and admits dirt.
- 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.
- Catalogue ratings for 62303-2RS (C 13.5 kN, C0 6.55 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.
Frequently asked questions
What are the dimensions of 62303-2RS?
The SKF 62303-2RS1 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 and a lifetime grease fill.
How does the bore code in 62303 work?
Codes 00–03 follow the exception table (10, 12, 15, 17 mm): 62303 fits a 17 mm shaft. Code × 5 starts at code 04.
What is the difference between 62303-2RS and a same-bore 62-series bearing?
Section height differs: 62303-2RS has a 15 mm radial section and C 13.5 kN; always match d, D and B — same bore alone never makes two bearings interchangeable.
Which fits should I use for 62303-2RS?
With a rotating inner ring use roughly j5/k5 on the shaft and H7 in the 47 mm housing; reverse the interference if the outer ring rotates.
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.