6240-M bearing: complete specifications & equivalents
The 6240-M is a ISO 15 radial bearing sized 200 x 360 x 58 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 200 mm |
| Outer diameter D | 360 mm |
| Width B | 58 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 270 kN |
| Basic static load rating C0 | 310 kN |
| Fatigue load limit Pu | 7.8 kN |
| Reference speed (thermal) | 3600 rpm |
| Limiting speed (mechanical) | 3200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 26000 g |
| Manufacturer designation | 6240 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 | 7.874 in |
|---|---|
| Outer diameter D | 14.173 in |
| Width B | 2.283 in |
| ISO bore code | 40 |
| Radial section height (D−d)/2 | 80 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) | 40 of 45 |
| Bore above smallest 6200-series size | 197 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6240-ZZ | NSK | full Dimensions and internal design equivalent — standard interchange. | NSK counterpart NSK 6240ZZ on the same 200×360×58 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 6240 | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6240 (open arrangement) shares the 200×360×58 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 6240-M model number is decoded
In the 6200-series, the last two digits encode the bore: 6240 carries code 40 = 200 mm (code × 5). The envelope is 200×360×58 mm (7.874×14.173×2.283 in) with a 80.0 mm radial section height, C 270 kN, C0 310 kN and Pu 7.8 kN. The open 6240 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 3200 r/min, catalogue mass 26000 g.
Typical equipment & failure modes
Common applications
- large industrial gearboxes
- heavy conveyor drives
- hoists and winches
- industrial fans and blowers
Known failure patterns
- contamination wear when the open arrangement is used without external seals
- lubricant starvation where no regreasing interval is maintained
- brinelling from static overload or hammer blows during mounting
- false brinelling from vibration while the shaft stands idle
Selection pitfalls — read before you substitute
- Catalogue ratings for 6240-M (C 270 kN, C0 310 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 6240-M home through the outer ring or balls brinells the raceways.
- The M suffix on 6240-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 26000 g quoted mass includes the heavier cage.
- Open 6240-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 6240-M; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- Fillet radii must clear the 6240-M chamfer so the 58 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
Frequently asked questions
What are the dimensions of 6240-M?
The SKF 6240 M measures 200 mm bore × 360 mm OD × 58 mm width (7.874 × 14.173 × 2.283 in), mass about 26000 g. It is open, with no shields or seals.
How does the bore code in 6240 work?
The final two digits of 6240 are bore code 40, multiplied by 5 to give 200 mm.
How heavy is 6240-M?
Catalogue mass is 26000 g for 6240 M; seal and cage executions of the same envelope differ by a few grams.
What load can 6240-M take?
Catalogue values for 6240 M: dynamic C 270 kN, static C0 310 kN, fatigue limit Pu 7.8 kN. Use C in life calculation and C0 for static checks at 200 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.