6236-M bearing: complete specifications & equivalents
The 6236-M is a ISO 15 radial bearing sized 180 x 320 x 52 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 180 mm |
| Outer diameter D | 320 mm |
| Width B | 52 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 229 kN |
| Basic static load rating C0 | 240 kN |
| Fatigue load limit Pu | 6.4 kN |
| Reference speed (thermal) | 4000 rpm |
| Limiting speed (mechanical) | 3800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 18000 g |
| Manufacturer designation | 6236 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 | 7.087 in |
|---|---|
| Outer diameter D | 12.598 in |
| Width B | 2.047 in |
| ISO bore code | 36 |
| Radial section height (D−d)/2 | 70 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) | 38 of 45 |
| Bore above smallest 6200-series size | 177 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6236-ZZ | NSK | full Dimensions and internal design equivalent — standard interchange. | NSK counterpart NSK 6236ZZ on the same 180×320×52 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 6236 | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6236 (open arrangement) shares the 180×320×52 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 6236-M model number is decoded
In the 6200-series, the last two digits encode the bore: 6236 carries code 36 = 180 mm (code × 5). The envelope is 180×320×52 mm (7.087×12.598×2.047 in) with a 70.0 mm radial section height, C 229 kN, C0 240 kN and Pu 6.4 kN. The open 6236 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 3800 r/min, catalogue mass 18000 g.
Typical equipment & failure modes
Common applications
- pulp and paper machinery
- marine deck machinery
- crusher auxiliary drives
- large industrial gearboxes
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
- Do not preload 6236-M to silence it: a deep-groove ball bearing is not angular-contact, and axial preload only raises temperature and shortens grease life.
- Catalogue ratings for 6236-M (C 229 kN, C0 240 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 6236-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 18000 g quoted mass includes the heavier cage.
- Open 6236-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 6236-M; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- Deep-groove geometry tolerates only minutes of misalignment; if the 320 mm housing bore cannot be aligned, move to a self-aligning bearing rather than shimming 6236-M.
Frequently asked questions
What are the dimensions of 6236-M?
The SKF 6236 M measures 180 mm bore × 320 mm OD × 52 mm width (7.087 × 12.598 × 2.047 in), mass about 18000 g. It is open, with no shields or seals.
How does the bore code in 6236 work?
The final two digits of 6236 are bore code 36, multiplied by 5 to give 180 mm.
What is the speed rating of 6236-M?
SKF lists a 4000 r/min thermal reference speed and a 3800 r/min mechanical limiting speed for 6236 M; real limits also depend on lubrication and fits.
What is the difference between 6236-M and a same-bore 62-series bearing?
Section height differs: 6236-M has a 70 mm radial section and C 229 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.