608-RSR bearing: complete specifications & equivalents
The 608-RSR is a ISO 15 radial bearing sized 8 x 22 x 7 mm (bore x OD x width) with RSR 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 | 7 mm |
| Material | GCr15 |
| Seal / shield | RSR |
| 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 |
| Reference speed (thermal) | 75000 rpm |
| Limiting speed (mechanical) | 38000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 12 g |
| Manufacturer designation | 608-2RSL |
| 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 & 6000-series range
| Bore d | 0.315 in |
|---|---|
| Outer diameter D | 0.866 in |
| Width B | 0.276 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 7 mm |
| Smallest bore in 6000-series | 4 mm |
| Largest outer diameter in 6000-series | 1150 mm |
| Width range across 6000-series | 4–155 mm |
| Bore position in 6000-series (smallest first) | 5 of 61 |
| Bore above smallest 6000-series size | 4 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 608 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 8×22×7 mm envelope and equivalent catalogue ratings; 608 is the open arrangement execution of this size — boundary dimensions interchangeable, only the seal/shield/cage execution differs. |
| 608-2RS | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 8×22×7 mm envelope and equivalent catalogue ratings; 608-2RSH is the two contact elastomer seals execution of this size — boundary dimensions interchangeable, only the seal/shield/cage execution differs. |
| 608-ZZ | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 8×22×7 mm envelope and equivalent catalogue ratings; 608-2Z is the two non-contact shields execution of this size — boundary dimensions interchangeable, only the seal/shield/cage execution differs. |
| W608-2RS | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 8×22×7 mm envelope, but the stainless and chrome-steel executions carry different catalogue ratings (3.45/1.37 kN vs 1.99/0.78 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
| W608-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 8×22×7 mm envelope, but the stainless and chrome-steel executions carry different catalogue ratings (3.45/1.37 kN vs 1.99/0.78 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
| W608 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 8×22×7 mm envelope, but the stainless and chrome-steel executions carry different catalogue ratings (3.45/1.37 kN vs 1.99/0.78 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
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 608-RSR model number is decoded
In the 6000-series, the final digit is the bore in millimetres: 608 fits a 8 mm shaft (direct-number miniature spelling). The envelope is 8×22×7 mm (0.315×0.866×0.276 in) with a 7.0 mm radial section height, C 3.45 kN, C0 1.37 kN and Pu 0.057 kN. SKF lists this as 608-2RSL with a low-friction non-contact seal (2RSL/2RZ spelling): it runs near open-bearing speed with less drag than a contact seal but is not liquid-tight. Limiting speed 38000 r/min, catalogue mass 12 g.
Typical equipment & failure modes
Common applications
- hand-held power tools
- domestic appliances
- instrument and encoder drives
- model-making and hobby mechanics
Known failure patterns
- fine dust or moisture passing the low-friction non-contact lip in dirty or wet duty
- grease loss past the low-drag seal when no regreasing schedule is kept
- cage damage from running beyond the limiting speed
- raceway smearing under marginal lubrication at start-up
Selection pitfalls — read before you substitute
- Mount by heating the inner ring (max 120 °C) — driving 608-RSR home through the outer ring or balls brinells the raceways.
- Deep-groove geometry tolerates only minutes of misalignment; if the 22 mm housing bore cannot be aligned, move to a self-aligning bearing rather than shimming 608-RSR.
- The low-friction seal on 608-RSR saves drag versus a contact lip but is not liquid-tight; wet or chemically aggressive positions need the 2RS version.
- Do not pry the caps off 608-RSR to repack it; shield/seal damage leaves a gap that throws grease and admits dirt.
- 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.
- Deep-groove geometry tolerates only minutes of misalignment; if the 22 mm housing bore cannot be aligned, move to a self-aligning bearing rather than shimming 608-RSR.
Frequently asked questions
What are the dimensions of 608-RSR?
The SKF 608-2RSL measures 8 mm bore × 22 mm OD × 7 mm width (0.315 × 0.866 × 0.276 in), mass about 12 g. It has two low-friction non-contact rubber seals.
How do I read the 608 designation?
Small miniature bearings print the bore as the final digit, so 608 is a 8 mm bearing; the series digits in front give the section (OD/width family).
How heavy is 608-RSR?
Catalogue mass is 12 g for 608-2RSL; seal and cage executions of the same envelope differ by a few grams.
What load can 608-RSR take?
Catalogue values for 608-2RSL: 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.
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.