6336 bearing: complete specifications & equivalents
The 6336 is a ISO 15 radial bearing sized 180 x 380 x 75 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 | 380 mm |
| Width B | 75 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 | 351 kN |
| Basic static load rating C0 | 405 kN |
| Fatigue load limit Pu | 10.4 kN |
| Reference speed (thermal) | 3600 rpm |
| Limiting speed (mechanical) | 2200 rpm |
| Operating temperature | -40 to +150 °C |
| Mass | 36500 g |
| Manufacturer designation | SKF 6336 |
| 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 & 6300-series range
| Bore d | 7.087 in |
|---|---|
| Outer diameter D | 14.961 in |
| Width B | 2.953 in |
| ISO bore code | 36 |
| Radial section height (D−d)/2 | 100 mm |
| Smallest bore in 6300-series | 2 mm |
| Largest outer diameter in 6300-series | 500 mm |
| Width range across 6300-series | 3–95 mm |
| Bore position in 6300-series (smallest first) | 36 of 40 |
| Bore above smallest 6300-series size | 178 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6336 | 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. |
| 6336-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. |
| 6336-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. |
| 6336-M | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF 6336 M (machined brass cage, open arrangement) is the same-size execution on the 180×380×75 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 6336 model number is decoded
In the 6300-series (diameter series 3 of ISO 15) the last two digits encode the bore: 6336 carries bore code 36 = 180 mm. Outside diameter 380 mm and width 75 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
- pulp and paper machinery
- medium and heavy industrial drives
- large gearboxes
- industrial fans and blowers
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
- At 180 mm bore the ring mass is significant: heat 6336 on an induction heater (max 120 °C), never over an open flame, and plan puller access or a withdrawal sleeve now for the day it has to come off again.
- The 63xx medium series gains rating at 180 mm bore through a 380 mm OD and 75 mm width; the heavier rolling elements also trade away some speed versus a 6236.
- The open 6336 has no lubricant retention: grease escapes and contaminants migrate straight into the 180×380×75 mm raceway, so specify a sealed arrangement for dusty or washdown duty.
- Storage matters for open bearings: 6336 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.
- Suffixes stack in a defined order — clearance follows the seal code, e.g. 6336-C3. No clearance suffix means normal CN clearance.
- Measure the shaft, do not trust the drawing: a 180 mm nominal journal worn by even 0.02 mm turns an interference seat into a creeping fit that frets the bore of 6336.
- The open 6336 needs external sealing and application-supplied lubrication; in the SKF catalogue the protected variants are separate order numbers 6336-2Z (shields) and 6336-2RSH (contact seals), not suffix-free 6336.
- The 351/405 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 6336 bearing?
A 6336 deep-groove ball bearing has a 180 mm bore, 380 mm outer diameter and 75 mm width (7.087 × 14.961 × 2.953 in), per ISO 15 boundary dimensions. It is an open bearing with no seals or shields.
What does no suffix on 6336 mean?
A bare 6336 designation means open: no shields or seals, normal CN radial clearance and P0 normal tolerance unless further suffixes are ordered. The application must supply and retain the lubrication.
How does the 6300 compare with other series at the same 180 mm bore?
The '3' is the medium diameter series: 380×75 mm, 100.0 mm radial section at 180 mm bore, carrying more load than a 6236 but needing a larger housing bore and giving up some speed.
Are 6336 bearings from different brands interchangeable?
For boundary dimensions, yes: every brand's 6336 uses the same ISO 15 envelope (180×380×75 mm). Load ratings, limiting speeds, clearance, precision class and sealing design can differ, so verify those in the supplier catalogue when substituting.
What is the SKF designation and catalogue data for 6336?
In the SKF Rolling Bearings catalogue this size is listed as 6336 — the open (unsealed) execution, 180×380×75 mm per ISO 15. Quoted values: C 351 kN, C0 405 kN, Pu 10.4 kN, limiting speed 2200 r/min, mass 36500 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 6336.
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.