6236 bearing: complete specifications & equivalents
The 6236 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 / C3 available |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| 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) | 2600 rpm |
| Operating temperature | -40 to +150 °C |
| Mass | 16000 g |
| Manufacturer designation | SKF 6236 |
| 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 & 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 | 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. |
| 6236-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. |
| 6236-ZZ | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 180×320×52 mm envelope per ISO 15; seal variant differs (OPEN vs ZZ) — confirm sealing suits the duty. |
| 6236-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. |
| 6236-M | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF 6236 M (machined brass cage, open arrangement) is the same-size execution on the 180×320×52 mm envelope with ratings within 10 % — 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 model number is decoded
In the 6200-series (diameter series 2 of ISO 15) the last two digits encode the bore: 6236 carries bore code 36 = 180 mm. Outside diameter 320 mm and width 52 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 180 mm shaft, typical catalogue practice is a m6 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
- hoists and winches
- heavy conveyors
- pulp and paper machinery
- medium and heavy industrial drives
Known failure patterns
- contamination wear from dust and dirt ingress through the open arrangement
- lubricant starvation when no regreasing interval is maintained
- raceway smearing under marginal lubrication at start-up
- edge loading from shaft deflection or housing misalignment
Selection pitfalls — read before you substitute
- Mount this 180 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.
- The 62xx light series is the default general-purpose section at 180 mm bore; before upgrading to a 6336 for extra capacity, confirm the housing accepts a 320 mm OD and 52 mm width — it is not a drop-in swap.
- The open 6236 has no lubricant retention: grease escapes and contaminants migrate straight into the 180×320×52 mm raceway, so specify a sealed arrangement for dusty or washdown duty.
- Storage matters for open bearings: 6236 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.
- A 180 mm bore listing showing the right d/D/B but no standard or precision-class reference may be a loose-tolerance import; measure bore/OD spread before fitting it to a machined shaft.
- Shaft and housing fillets must clear the bearing chamfer so the 52 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius.
- The open 6236 needs external sealing and application-supplied lubrication; in the SKF catalogue the protected variants are separate order numbers 6236-2Z (shields) and 6236-2RSH (contact seals), not suffix-free 6236.
- The 229/240 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 6236 bearing?
A 6236 deep-groove ball bearing has a 180 mm bore, 320 mm outer diameter and 52 mm width (7.087 × 12.598 × 2.047 in), per ISO 15 boundary dimensions. It is an open bearing with no seals or shields.
How should 6236 be mounted?
Apply the mounting force to the ring being fitted: on a 180 mm shaft seat the press load must pass through the inner-ring face only. Induction heating of the inner ring (max 120 °C) is the clean method at this size. Never strike the outer ring, the cage or the seals.
What lubrication does 6236 need?
The open 6236 is lubricated by the application; a NLGI 2 lithium-soap grease filled to roughly 25–35% of the free volume is the common choice, with a defined relubrication interval.
How does the 6236 bore code work?
The last two digits of 6236 are bore code 36, giving 36 × 5 = 180 mm bore. The 320 mm outside diameter and 52 mm width follow the ISO 15 diameter series, not the bore code alone.
What is the SKF designation and catalogue data for 6236?
In the SKF Rolling Bearings catalogue this size is listed as 6236 — the open (unsealed) execution, 180×320×52 mm per ISO 15. Quoted values: C 229 kN, C0 240 kN, Pu 6.4 kN, limiting speed 2600 r/min, mass 16000 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 6236.
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.