630-8-2RS bearing: complete specifications & equivalents
The 630-8-2RS is a ISO 15 radial bearing sized 8 x 22 x 11 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 | 8 mm |
| Outer diameter D | 22 mm |
| Width B | 11 mm |
| Material | GCr15 |
| Seal / shield | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 3.45 kN |
| Basic static load rating C0 | 1.37 kN |
| Fatigue load limit Pu | 0.057 kN |
| Limiting speed (mechanical) | 22000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 16 g |
| Manufacturer designation | 630/8-2RS1 |
| 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 & 6300-series range
| Bore d | 0.315 in |
|---|---|
| Outer diameter D | 0.866 in |
| Width B | 0.433 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 7 mm |
| Smallest bore in 6300-series | 2 mm |
| Largest outer diameter in 6300-series | 500 mm |
| Width range across 6300-series | 3–95 mm |
| Bore position in 6300-series (smallest first) | 4 of 40 |
| Bore above smallest 6300-series size | 6 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 630-8-2RS model number is decoded
In the miniature 6300-series, the bore is written directly after the slash as 8 mm (bores below 10 mm use the slash spelling). The envelope is 8×22×11 mm (0.315×0.866×0.433 in) with a 7.0 mm radial section height, C 3.45 kN, C0 1.37 kN and Pu 0.057 kN. SKF catalogues the sealed execution as 630/8-2RS1: 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 22000 r/min, catalogue mass 16 g.
Typical equipment & failure modes
Common applications
- small pumps
- office equipment
- fractional-horsepower motors
- small fans and blowers
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
- rolling-contact fatigue spalling once the catalogue L10 life is exceeded
- brinelling from static overload or hammer blows during mounting
Selection pitfalls — read before you substitute
- Assign interference to the rotating ring: on a conventional shaft-mounted 8 mm position the inner ring rotates, so use a k5/m6 shaft seat with an H7 housing — reverse the logic if the outer ring rotates.
- Fillet radii must clear the 630-8-2RS chamfer so the 11 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
- Contact seals make 630-8-2RS slower than the open 630/8 (limiting 22000 r/min) and forbid solvent washing, which destroys the lifetime grease.
- Do not pry the caps off 630-8-2RS to repack it; shield/seal damage leaves a gap that throws grease and admits dirt.
- Do not preload 630-8-2RS to silence it: a deep-groove ball bearing is not angular-contact, and axial preload only raises temperature and shortens grease life.
- Clearance suffixes follow the seal code in the designation stack (e.g. 630/8-2Z/C3 in SKF spelling); no suffix means normal CN internal clearance.
Frequently asked questions
What are the dimensions of 630-8-2RS?
The SKF 630/8-2RS1 measures 8 mm bore × 22 mm OD × 11 mm width (0.315 × 0.866 × 0.433 in), mass about 16 g. It has two contact rubber seals and a lifetime grease fill.
Why is there a slash in the designation 630/8-2RS1?
The slash writes a bore that falls outside the two-digit code table: 630/8 means 8 mm bore. The site slug 630-8-2RS replaces the slash with a hyphen.
What load can 630-8-2RS take?
Catalogue values for 630/8-2RS1: dynamic C 3.45 kN, static C0 1.37 kN, fatigue limit Pu 0.057 kN. Use C in life calculation and C0 for static checks at 8 mm bore.
What is the speed rating of 630-8-2RS?
SKF publishes only the 22000 r/min limiting speed for this execution; sealed variants have no thermal reference speed because seal and grease life govern.
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.