6322-M (brass cage) bearing: complete specifications & equivalents
The 6322-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 | 203 kN |
| Basic static load rating C0 | 180 kN |
| Fatigue load limit Pu | 5.7 kN |
| Reference speed (thermal) | 6000 rpm |
| Limiting speed (mechanical) | 5300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 11500 g |
| Manufacturer designation | 6322 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 & 6300-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 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) | 29 of 40 |
| Bore above smallest 6300-series size | 108 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6322-ZZ | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | NSK bearing NSK 6322ZZ on the same 110×240×50 mm envelope, but catalogue C/C0 differ (203/180 kN vs 226/179 kN) — envelope interchange only after a load check. |
| 6322-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | NSK bearing NSK 6322 on the same 110×240×50 mm envelope, but catalogue C/C0 differ (203/180 kN vs 226/179 kN) — envelope interchange only after a load check. |
| 6322-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | NTN bearing 6322 on the same 110×240×50 mm envelope, but catalogue C/C0 differ (203/180 kN vs 227/179 kN) — envelope interchange only after a load check. |
| 6322-2RS | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | NTN bearing 6322LLU on the same 110×240×50 mm envelope, but catalogue C/C0 differ (203/180 kN vs 227/179 kN) — envelope interchange only after a load check. |
| 6322-RSR | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | NTN bearing 6322LLB on the same 110×240×50 mm envelope, but catalogue C/C0 differ (203/180 kN vs 227/179 kN) — envelope interchange only after a load check. |
| 6322-ZZ-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | NTN bearing 6322ZZ on the same 110×240×50 mm envelope, but catalogue C/C0 differ (203/180 kN vs 227/179 kN) — envelope interchange only after a load check. |
| 6322 | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6322 (open arrangement) shares the 110×240×50 mm envelope with ratings within 10 % — execution variant of the same size; 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 6322-M model number is decoded
In the 6300-series, the last two digits encode the bore: 6322 carries code 22 = 110 mm (code × 5). The envelope is 110×240×50 mm (4.331×9.449×1.969 in) with a 65.0 mm radial section height, C 203 kN, C0 180 kN and Pu 5.7 kN. The open 6322 M carries no shields or seals and relies on application lubrication and external sealing. The M suffix identifies the machined brass cage execution, a separate order number from the pressed-steel version. Limiting speed 5300 r/min, catalogue mass 11500 g.
Typical equipment & failure modes
Common applications
- material-handling equipment
- industrial fans
- compressor drives
- machine tool auxiliaries
Known failure patterns
- contamination wear when the open arrangement is used without external seals
- lubricant starvation where no regreasing interval is maintained
- false brinelling from vibration while the shaft stands idle
- fretting corrosion on a creeping shaft or housing seat
Selection pitfalls — read before you substitute
- Assign interference to the rotating ring: on a conventional shaft-mounted 110 mm position the inner ring rotates, so use a k5/m6 shaft seat with an H7 housing — reverse the logic if the outer ring rotates.
- 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.
- The M suffix on 6322-M denotes a machined brass cage: it is the choice for high speeds, marginal lubrication and shock/vibration duty, and it is temperature-tolerant where polymer cages are not — the 11500 g quoted mass includes the heavier cage.
- Open 6322-M needs external sealing at the arrangement level; in dusty housings its life depends entirely on those external seals and the regreasing schedule.
- Plan a relubrication interval for 6322-M; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- Catalogue ratings for 6322-M (C 203 kN, C0 180 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.
- For positions that need relubrication, choose the open execution of 6322 and design the housing with a grease path; shielded and sealed versions are intended as fit-and-forget units.
- Sealed SKF units are filled with a lithium-based grease for general service; food-grade, low-temperature and high-temperature fills are order options and are not field-interchangeable once the unit is sealed.
Frequently asked questions
What are the dimensions of 6322-M?
The SKF 6322 M measures 110 mm bore × 240 mm OD × 50 mm width (4.331 × 9.449 × 1.969 in), mass about 11500 g. It is open, with no shields or seals.
How does the bore code in 6322 work?
The final two digits of 6322 are bore code 22, multiplied by 5 to give 110 mm.
How heavy is 6322-M?
Catalogue mass is 11500 g for 6322 M; seal and cage executions of the same envelope differ by a few grams.
What internal clearance does 6322-M have?
Standard supply is normal CN radial clearance unless a suffix states otherwise; for tight fits or hot shafts SKF lists the C3 execution of the same size — the residual clearance left after mounting is what governs running life.
How long can a greased 6322-M be stored?
Sealed and shielded SKF units carry a finite grease shelf life: SKF recommends first-in-first-out stock rotation and dry, cool, vibration-free storage. Open units ship with rust preventive only and are greased at assembly.
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.