13940 bearing: complete specifications & equivalents
The 13940 is a ISO 15 radial bearing sized 200 x 280 x 60 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 | 280 mm |
| Width B | 60 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 60.5 kN |
| Basic static load rating C0 | 29 kN |
| Fatigue load limit Pu | 0.97 kN |
| Reference speed (thermal) | 4300 rpm |
| Limiting speed (mechanical) | 2600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 10500 g |
| Manufacturer designation | 13940 |
| 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 & 1300-series range
| Bore d | 7.874 in |
|---|---|
| Outer diameter D | 11.024 in |
| Width B | 2.362 in |
| ISO bore code | 40 |
| Radial section height (D−d)/2 | 40 mm |
| Smallest bore in 1300-series | 5 mm |
| Largest outer diameter in 1300-series | 320 mm |
| Width range across 1300-series | 6–74 mm |
| Bore position in 1300-series (smallest first) | 27 of 29 |
| Bore above smallest 1300-series size | 195 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 13940 model number is decoded
The 13xx series is the medium/normal-section self-aligning ball bearing (ISO dimension series 03). the last two digits encode the bore: 13940 carries code 40 = 200 mm (code × 5). Envelope 200×280×60 mm (7.874×11.024×2.362 in) with a 40.0 mm radial section height, C 60.5 kN, C0 29 kN and Pu 0.97 kN. The open 13940 carries no shields or seals and relies on application lubrication and external sealing. The suffix identifies the glass-fibre-reinforced polyamide 66 cage execution. The bore is cylindrical (straight), for a press-fit on a 200 mm shaft. Reference (thermal) speed 4300 r/min, limiting speed 2600 r/min, catalogue mass 10500 g.
Typical equipment & failure modes
Common applications
- crusher feeders
- large industrial gearboxes
- material-handling winches
- large conveyor drives
Known failure patterns
- contamination wear when the open arrangement is used without adequate external sealing
- lubricant starvation where no regreasing interval is maintained
- raceway smearing under marginal lubrication at start-up
- electrical pitting in VFD-driven motors without shaft grounding
Selection pitfalls — read before you substitute
- Catalogue ratings for 13940 (C 60.5 kN, C0 29 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.
- Self-aligning ball bearings tolerate up to roughly 2–3° of static misalignment, but the sealed 13940 (2RS1) allows less — the lip seal binds before the spherical raceway does.
- The suffix on 13940 denotes a glass-fibre-reinforced polyamide 66 cage: quiet and light at the 2600 r/min limiting speed, but it softens above roughly 120 °C — check the oil temperature in hot drives.
- Fillet radii must clear the 13940 chamfer so the 60 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
- Self-aligning ball bearings tolerate up to roughly 2–3° of static misalignment, but the sealed 13940 (2RS1) allows less — the lip seal binds before the spherical raceway does.
- Assign interference to the rotating ring: on a 200 mm rotating shaft use a m6 seat with an H7 housing; reverse the logic if the outer ring rotates.
Frequently asked questions
What are the dimensions of 13940?
SKF 13940 measures 200 mm bore × 280 mm OD × 60 mm width (7.874 × 11.024 × 2.362 in), mass about 10500 g. It is open, with no shields or seals.
How does the bore code in 13940 work?
The final two digits of 13940 are bore code 40, multiplied by 5 to give 200 mm.
What is the speed rating of 13940?
SKF lists a 4300 r/min thermal reference speed and a 2600 r/min mechanical limiting speed for 13940; real limits also depend on lubrication and fits.
How much misalignment can 13940 tolerate?
Self-aligning ball bearings tolerate roughly 2–3° of static misalignment for open executions; sealed 2RS1 variants like 13940 allow less (about 1°) because the seal lip binds first.
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.