6210-M bearing: complete specifications & equivalents
The 6210-M is a ISO 15 radial bearing sized 50 x 90 x 20 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 50 mm |
| Outer diameter D | 90 mm |
| Width B | 20 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 37.1 kN |
| Basic static load rating C0 | 23.2 kN |
| Fatigue load limit Pu | 0.98 kN |
| Reference speed (thermal) | 15000 rpm |
| Limiting speed (mechanical) | 14000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 520 g |
| Manufacturer designation | 6210 M |
| 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 & 6200-series range
| Bore d | 1.969 in |
|---|---|
| Outer diameter D | 3.543 in |
| Width B | 0.787 in |
| ISO bore code | 10 |
| Radial section height (D−d)/2 | 20 mm |
| Smallest bore in 6200-series | 3 mm |
| Largest outer diameter in 6200-series | 540 mm |
| Width range across 6200-series | 2.5–85 mm |
| Bore position in 6200-series (smallest first) | 19 of 45 |
| Bore above smallest 6200-series size | 47 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6210-RSR | NSK | full Dimensions and internal design equivalent — standard interchange. | NSK counterpart NSK 6210VV on the same 50×90×20 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| W6210-2RS | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×90×20 mm envelope, but the stainless and chrome-steel executions carry different catalogue ratings (37.1/23.2 kN vs 30.2/23.2 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
| W6210-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×90×20 mm envelope, but the stainless and chrome-steel executions carry different catalogue ratings (37.1/23.2 kN vs 30.2/23.2 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
| 210 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×90×20 mm envelope as SKF 210, but catalogue C/C0 differ (37.1/23.2 kN vs 39.1/34.5 kN) — envelope match only after a load check. |
| 210-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 50×90×20 mm envelope as SKF 210-2Z, but catalogue C/C0 differ (37.1/23.2 kN vs 39.1/34.5 kN) — envelope match only after a load check. |
| 6210 | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6210 (open arrangement) shares the 50×90×20 mm envelope with ratings within 10 % — execution variant of the same size; boundary dimensions interchangeable. |
| 6210-ZZ | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6210-2Z (two non-contact shields) shares the 50×90×20 mm envelope with ratings within 10 % — execution variant of the same size; boundary dimensions interchangeable. |
| 6210-2RS | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6210-2RSH (two contact elastomer seals) shares the 50×90×20 mm envelope with ratings within 10 % — execution variant of the same size; boundary dimensions interchangeable. |
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 6210-M model number is decoded
In the 6200-series, the last two digits encode the bore: 6210 carries code 10 = 50 mm (code × 5). The envelope is 50×90×20 mm (1.969×3.543×0.787 in) with a 20.0 mm radial section height, C 37.1 kN, C0 23.2 kN and Pu 0.98 kN. The open 6210 M carries no shields or seals and relies on application lubrication and external sealing. The M suffix identifies the machined brass cage execution, a separate order number from the pressed-steel version. Limiting speed 14000 r/min, catalogue mass 520 g.
Typical equipment & failure modes
Common applications
- gearboxes and speed reducers
- centrifugal and positive-displacement pumps
- material-handling equipment
- industrial fans
Known failure patterns
- contamination wear when the open arrangement is used without external seals
- lubricant starvation where no regreasing interval is maintained
- 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
- The fatigue load limit is 0.98 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
- Catalogue ratings for 6210-M (C 37.1 kN, C0 23.2 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.
- The M suffix on 6210-M denotes a machined brass cage: it is the choice for high speeds, marginal lubrication and shock/vibration duty, and it is temperature-tolerant where polymer cages are not — the 520 g quoted mass includes the heavier cage.
- Open 6210-M needs external sealing at the arrangement level; in dusty housings its life depends entirely on those external seals and the regreasing schedule.
- Plan a relubrication interval for 6210-M; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- The fatigue load limit is 0.98 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
Frequently asked questions
What are the dimensions of 6210-M?
The SKF 6210 M measures 50 mm bore × 90 mm OD × 20 mm width (1.969 × 3.543 × 0.787 in), mass about 520 g. It is open, with no shields or seals.
How does the bore code in 6210 work?
The final two digits of 6210 are bore code 10, multiplied by 5 to give 50 mm.
Which fits should I use for 6210-M?
With a rotating inner ring use roughly k5 on the shaft and H7 in the 90 mm housing; reverse the interference if the outer ring rotates.
How heavy is 6210-M?
Catalogue mass is 520 g for 6210 M; seal and cage executions of the same envelope differ by a few grams.
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.