1322-M bearing: complete specifications & equivalents
The 1322-M is a ISO 15 radial bearing sized 110 x 240 x 50 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 110 mm |
| Outer diameter D | 240 mm |
| Width B | 50 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 163 kN |
| Basic static load rating C0 | 72 kN |
| Fatigue load limit Pu | 2.75 kN |
| Reference speed (thermal) | 5300 rpm |
| Limiting speed (mechanical) | 3600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 12000 g |
| Manufacturer designation | 1322 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 & 1300-series range
| Bore d | 4.331 in |
|---|---|
| Outer diameter D | 9.449 in |
| Width B | 1.969 in |
| ISO bore code | 22 |
| Radial section height (D−d)/2 | 65 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) | 24 of 29 |
| Bore above smallest 1300-series size | 105 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 1322 | 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. |
| 1322-KM | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 110×240×50 mm envelope with catalogue ratings within 10 %; 1322 KM is the machined brass cage, open arrangement, tapered bore execution of this size — boundary dimensions interchangeable, only the seal/cage/bore execution differs. |
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 1322-M 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: 1322 carries code 22 = 110 mm (code × 5). Envelope 110×240×50 mm (4.331×9.449×1.969 in) with a 65.0 mm radial section height, C 163 kN, C0 72 kN and Pu 2.75 kN. The open 1322 M carries no shields or seals and relies on application lubrication and external sealing. The M suffix identifies the machined brass cage execution. The bore is cylindrical (straight), for a press-fit on a 110 mm shaft. Reference (thermal) speed 5300 r/min, limiting speed 3600 r/min, catalogue mass 12000 g.
Typical equipment & failure modes
Common applications
- industrial fans and blowers
- woodworking machinery
- pump shafts with mild misalignment
- material-handling equipment
Known failure patterns
- lubricant starvation where no regreasing interval is maintained
- contamination wear when the open arrangement is used without adequate external sealing
- 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
- At 110 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.
- Fillet radii must clear the 1322-M chamfer so the 50 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
- The M suffix on 1322-M denotes a machined brass cage: the choice for high speeds, marginal lubrication and shock/vibration duty, and temperature-tolerant where polymer cages are not.
- Catalogue ratings for 1322-M (C 163 kN, C0 72 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.
- Mount 1322-M 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 2.75 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
Frequently asked questions
What are the dimensions of 1322-M?
SKF 1322 M measures 110 mm bore × 240 mm OD × 50 mm width (4.331 × 9.449 × 1.969 in), mass about 12000 g. It is open, with no shields or seals.
How does the bore code in 1322 work?
The final two digits of 1322 are bore code 22, multiplied by 5 to give 110 mm.
What load can 1322-M take?
Catalogue values for 1322 M: dynamic C 163 kN, static C0 72 kN, fatigue limit Pu 2.75 kN. Use C in life calculation and C0 for static checks at 110 mm bore.
What is the speed rating of 1322-M?
SKF lists a 5300 r/min thermal reference speed and a 3600 r/min mechanical limiting speed for 1322 M; real limits also depend on lubrication and fits.
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.