13944 bearing: complete specifications & equivalents
The 13944 is a ISO 15 radial bearing sized 220 x 300 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 | 220 mm |
| Outer diameter D | 300 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 | 30.5 kN |
| Fatigue load limit Pu | 0.97 kN |
| Reference speed (thermal) | 3800 rpm |
| Limiting speed (mechanical) | 2400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 11000 g |
| Manufacturer designation | 13944 |
| 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 | 8.661 in |
|---|---|
| Outer diameter D | 11.811 in |
| Width B | 2.362 in |
| ISO bore code | 44 |
| 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) | 28 of 29 |
| Bore above smallest 1300-series size | 215 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 13944 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: 13944 carries code 44 = 220 mm (code × 5). Envelope 220×300×60 mm (8.661×11.811×2.362 in) with a 40.0 mm radial section height, C 60.5 kN, C0 30.5 kN and Pu 0.97 kN. The open 13944 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 220 mm shaft. Reference (thermal) speed 3800 r/min, limiting speed 2400 r/min, catalogue mass 11000 g.
Typical equipment & failure modes
Common applications
- heavy fan and blower shafts
- mill and kiln auxiliary drives
- paper-machine rolls
- marine deck machinery
Known failure patterns
- contamination wear when the open arrangement is used without adequate external sealing
- 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
- The spherical outer raceway lets 13944 tolerate shaft deflection, but it does not increase thrust capacity — combined loads still need an angular-contact or deep-groove bearing.
- The fatigue load limit is 0.97 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
- The suffix on 13944 denotes a glass-fibre-reinforced polyamide 66 cage: quiet and light at the 2400 r/min limiting speed, but it softens above roughly 120 °C — check the oil temperature in hot drives.
- Mount 13944 by heating the inner ring (max 120 °C) on a cylindrical bore — driving it home through the outer ring or balls brinells the raceways.
- The fatigue load limit is 0.97 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
- At 220 mm bore, C3 clearance is the safe choice when interference fits plus temperature rise consume the CN clearance; a hot tight bearing with no residual clearance fails fast.
Frequently asked questions
What are the dimensions of 13944?
SKF 13944 measures 220 mm bore × 300 mm OD × 60 mm width (8.661 × 11.811 × 2.362 in), mass about 11000 g. It is open, with no shields or seals.
How does the bore code in 13944 work?
The final two digits of 13944 are bore code 44, multiplied by 5 to give 220 mm.
Can 13944 take axial load?
A self-aligning ball bearing can carry some axial load in addition to radial load, but its axial capacity is lower than an angular-contact bearing of the same envelope. Use it where misalignment, not thrust, is the main requirement.
Which fits should I use for 13944?
With a rotating inner ring use roughly m6 on the shaft and H7 in the 300 mm housing; reverse the interference if the outer ring rotates.
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.