63008-2RS bearing: complete specifications & equivalents
The 63008-2RS is a ISO 15 radial bearing sized 40 x 68 x 21 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 | 40 mm |
| Outer diameter D | 68 mm |
| Width B | 21 mm |
| Material | GCr15 |
| Seal / shield | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 16.8 kN |
| Basic static load rating C0 | 11 kN |
| Fatigue load limit Pu | 0.49 kN |
| Limiting speed (mechanical) | 6300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 270 g |
| Manufacturer designation | 63008-2RS1 |
| 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 & 63000-series range
| Bore d | 1.575 in |
|---|---|
| Outer diameter D | 2.677 in |
| Width B | 0.827 in |
| ISO bore code | 08 |
| Radial section height (D−d)/2 | 14 mm |
| Smallest bore in 63000-series | 10 mm |
| Largest outer diameter in 63000-series | 80 mm |
| Width range across 63000-series | 12–23 mm |
| Bore position in 63000-series (smallest first) | 9 of 11 |
| Bore above smallest 63000-series size | 30 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 63008 | ISO 15 | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range. Brand-specific OEM equivalents pending multi-source data. |
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 63008-2RS model number is decoded
The 63000-series is the wide-section counterpart of the standard deep-groove family (extra width code built into the designation); the last two digits encode the bore: 63008 carries code 08 = 40 mm (code × 5). The envelope is 40×68×21 mm (1.575×2.677×0.827 in) with a 14.0 mm radial section height, C 16.8 kN, C0 11 kN and Pu 0.49 kN. SKF catalogues the sealed execution as 63008-2RS1: 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 6300 r/min, catalogue mass 270 g.
Typical equipment & failure modes
Common applications
- agricultural gearboxes
- industrial electric motors
- gearboxes and speed reducers
- centrifugal and positive-displacement pumps
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
- edge loading from shaft deflection or housing misalignment
- rolling-contact fatigue spalling once the catalogue L10 life is exceeded
Selection pitfalls — read before you substitute
- Deep-groove geometry tolerates only minutes of misalignment; if the 68 mm housing bore cannot be aligned, move to a self-aligning bearing rather than shimming 63008-2RS.
- Fillet radii must clear the 63008-2RS chamfer so the 21 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
- Contact seals make 63008-2RS slower than the open 63008 (limiting 6300 r/min) and forbid solvent washing, which destroys the lifetime grease.
- Do not pry the caps off 63008-2RS to repack it; shield/seal damage leaves a gap that throws grease and admits dirt.
- Catalogue ratings for 63008-2RS (C 16.8 kN, C0 11 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.
- Mount by heating the inner ring (max 120 °C) — driving 63008-2RS home through the outer ring or balls brinells the raceways.
Frequently asked questions
What are the dimensions of 63008-2RS?
The SKF 63008-2RS1 measures 40 mm bore × 68 mm OD × 21 mm width (1.575 × 2.677 × 0.827 in), mass about 270 g. It has two contact rubber seals and a lifetime grease fill.
How does the bore code in 63008 work?
The final two digits of 63008 are bore code 08, multiplied by 5 to give 40 mm.
What is the speed rating of 63008-2RS?
SKF publishes only the 6300 r/min limiting speed for this execution; sealed variants have no thermal reference speed because seal and grease life govern.
What is the difference between 63008-2RS and a same-bore 62-series bearing?
Section height differs: 63008-2RS has a 14 mm radial section and C 16.8 kN; always match d, D and B — same bore alone never makes two bearings interchangeable.
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.