6008 bearing: complete specifications & equivalents
The 6008 is a ISO 15 radial bearing sized 40 x 68 x 15 mm (bore x OD x width). 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 | 15 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN / C3 available |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 17.8 kN |
| Basic static load rating C0 | 11 kN |
| Fatigue load limit Pu | 0.49 kN |
| Reference speed (thermal) | 22000 rpm |
| Limiting speed (mechanical) | 14000 rpm |
| Operating temperature | -40 to +150 °C |
| Mass | 190 g |
| Manufacturer designation | SKF 6008 |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-25 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-24
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 | 1.575 in |
|---|---|
| Outer diameter D | 2.677 in |
| Width B | 0.591 in |
| ISO bore code | 08 |
| Radial section height (D−d)/2 | 14 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) | 15 of 61 |
| Bore above smallest 6000-series size | 36 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6008-2RS-FAG | FAG | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 40×68×15 mm envelope per ISO 15; seal variant differs (OPEN vs 2RS) — confirm sealing suits the duty. |
| 6008-FAG | FAG | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
| 6008-ZZ-FAG | FAG | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 40×68×15 mm envelope per ISO 15; seal variant differs (OPEN vs ZZ) — confirm sealing suits the duty. |
| 6008 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier. |
| 6008-2RS-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 40×68×15 mm envelope per ISO 15; seal variant differs (OPEN vs 2RS) — confirm sealing suits the duty. |
| 6008-NSK | NSK | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
| 6008-RSR-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 40×68×15 mm envelope per ISO 15; seal variant differs (OPEN vs RSR) — confirm sealing suits the duty. |
| 6008-ZZ-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 40×68×15 mm envelope per ISO 15; seal variant differs (OPEN vs ZZ) — confirm sealing suits the duty. |
| 6008-2RS-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 40×68×15 mm envelope per ISO 15; seal variant differs (OPEN vs 2RS) — confirm sealing suits the duty. |
| 6008-NTN | NTN | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
| 6008-RSR-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 40×68×15 mm envelope per ISO 15; seal variant differs (OPEN vs RSR) — confirm sealing suits the duty. |
| 6008-ZZ-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 40×68×15 mm envelope per ISO 15; seal variant differs (OPEN vs ZZ) — confirm sealing suits the duty. |
| W6008-2RS | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF stainless execution W 6008-2RS1 shares the 40×68×15 mm envelope but rates differently (17.8/11 kN vs 14.6/11.4 kN) — not a load-rating equivalent. |
| W6008-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF stainless execution W 6008-2Z shares the 40×68×15 mm envelope but rates differently (17.8/11 kN vs 14.6/11.4 kN) — not a load-rating equivalent. |
| W6008 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF stainless execution W 6008 shares the 40×68×15 mm envelope but rates differently (17.8/11 kN vs 14.6/11.4 kN) — 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 6008 model number is decoded
In the 6000-series (diameter series 0 of ISO 15) the last two digits encode the bore: 6008 carries bore code 08 = 40 mm. Outside diameter 68 mm and width 15 mm come from the ISO 15 boundary-dimensions general plan. With no seal suffix the bearing is open: no shields or seals are fitted and lubrication is supplied by the application. For normal-load mounting with a rotating inner ring on a 40 mm shaft, typical catalogue practice is a k5 shaft seat with an H7 housing bore — verify against the actual load direction and magnitude. In the SKF catalogue this open execution carries the bare designation; protected variants are ordered separately as -2Z and -2RSH.
Typical equipment & failure modes
Common applications
- conveyors and drives
- agricultural equipment
- fans and blowers
- electric motors
Known failure patterns
- contamination wear from dust and dirt ingress through the open arrangement
- lubricant starvation when no regreasing interval is maintained
- false brinelling from vibration while the shaft is stationary
- fretting corrosion on a loose shaft seat
Selection pitfalls — read before you substitute
- At a 40 mm bore, a shaft-seat burr or an overtight setscrew can score the thin inner ring of 6008; check shaft finish and runout (target Ra ≤ 1.6 µm) before pressing it home.
- Choosing the 60xx extra-light section saves radial space at 40 mm bore, but the trade-off is rating: if the drive sees shock or frequent start-stop cycles, re-check the L10 life against a 6208 before committing to the smaller envelope.
- The open 6008 has no lubricant retention: grease escapes and contaminants migrate straight into the 40×68×15 mm raceway, so specify a sealed arrangement for dusty or washdown duty.
- Storage matters for open bearings: 6008 leaves the factory with rust preventive only, so clean it and apply the service grease at assembly even if the rings look oily from the wrapper.
- Grease compatibility is not guaranteed between fills: mixing lithium and polyurea thickeners in a 6000-series position can soften the mixture and leak — clean out the old fill before switching grease types.
- The housing bore for the 68 mm OD should be round within IT7; an oval bore pinches the outer ring of 6008 and shows up later as two-point loaded raceway wear.
- The open 6008 needs external sealing and application-supplied lubrication; in the SKF catalogue the protected variants are separate order numbers 6008-2Z (shields) and 6008-2RSH (contact seals), not suffix-free 6008.
- The 17.8/11 kN ratings here are SKF Explorer-class figures from catalogue PUB BU/P1 17000/1 EN (Oct 2018); SKF can revise internal geometry and ratings without changing the designation, so treat the catalogue version and date as part of the specification and re-verify for critical drives.
Frequently asked questions
What are the dimensions of a 6008 bearing?
A 6008 deep-groove ball bearing has a 40 mm bore, 68 mm outer diameter and 15 mm width (1.575 × 2.677 × 0.591 in), per ISO 15 boundary dimensions. It is an open bearing with no seals or shields.
How does the 6000 compare with other series at the same 40 mm bore?
The second digit is the diameter series: 60 is the smallest standard section (68×15 mm, 14.0 mm radial section) at 40 mm bore — below 62/63/64 in load capacity, for light loads in compact spaces.
Are 6008 bearings from different brands interchangeable?
For boundary dimensions, yes: every brand's 6008 uses the same ISO 15 envelope (40×68×15 mm). Load ratings, limiting speeds, clearance, precision class and sealing design can differ, so verify those in the supplier catalogue when substituting.
What internal clearance does 6008 have?
Unless a clearance suffix says otherwise, 6008 is manufactured to normal (CN) radial internal clearance. Tight fits and hot shafts consume clearance in service — for those conditions order the C3 execution of 6008 and verify the residual clearance after mounting.
What is the SKF designation and catalogue data for 6008?
In the SKF Rolling Bearings catalogue this size is listed as 6008 — the open (unsealed) execution, 40×68×15 mm per ISO 15. Quoted values: C 17.8 kN, C0 11 kN, Pu 0.49 kN, limiting speed 14000 r/min, mass 190 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 6008.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-25. Read our editorial & correction policy.