6326-M bearing: complete specifications & equivalents
The 6326-M is a ISO 15 radial bearing sized 130 x 280 x 58 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 130 mm |
| Outer diameter D | 280 mm |
| Width B | 58 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 229 kN |
| Basic static load rating C0 | 216 kN |
| Fatigue load limit Pu | 6.3 kN |
| Reference speed (thermal) | 5000 rpm |
| Limiting speed (mechanical) | 4500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 17500 g |
| Manufacturer designation | 6326 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 | 5.118 in |
|---|---|
| Outer diameter D | 11.024 in |
| Width B | 2.283 in |
| ISO bore code | 26 |
| Radial section height (D−d)/2 | 75 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) | 31 of 40 |
| Bore above smallest 6300-series size | 128 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6326-ZZ | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | NSK bearing NSK 6326ZZ on the same 130×280×58 mm envelope, but catalogue C/C0 differ (229/216 kN vs 252/214 kN) — envelope interchange only after a load check. |
| 6326 | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6326 (open arrangement) shares the 130×280×58 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 6326-M model number is decoded
In the 6300-series, the last two digits encode the bore: 6326 carries code 26 = 130 mm (code × 5). The envelope is 130×280×58 mm (5.118×11.024×2.283 in) with a 75.0 mm radial section height, C 229 kN, C0 216 kN and Pu 6.3 kN. The open 6326 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 4500 r/min, catalogue mass 17500 g.
Typical equipment & failure modes
Common applications
- crusher auxiliary drives
- large industrial gearboxes
- heavy conveyor drives
- hoists and winches
Known failure patterns
- contamination wear when the open arrangement is used without external seals
- lubricant starvation where no regreasing interval is maintained
- electrical pitting in VFD-driven motors without shaft grounding
- edge loading from shaft deflection or housing misalignment
Selection pitfalls — read before you substitute
- Clearance suffixes follow the seal code in the designation stack (e.g. 6326-2Z/C3 in SKF spelling); no suffix means normal CN internal clearance.
- Clearance suffixes follow the seal code in the designation stack (e.g. 6326-2Z/C3 in SKF spelling); no suffix means normal CN internal clearance.
- The M suffix on 6326-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 17500 g quoted mass includes the heavier cage.
- Open 6326-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 6326-M; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- At 130 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 6326-M?
The SKF 6326 M measures 130 mm bore × 280 mm OD × 58 mm width (5.118 × 11.024 × 2.283 in), mass about 17500 g. It is open, with no shields or seals.
How does the bore code in 6326 work?
The final two digits of 6326 are bore code 26, multiplied by 5 to give 130 mm.
How heavy is 6326-M?
Catalogue mass is 17500 g for 6326 M; seal and cage executions of the same envelope differ by a few grams.
What load can 6326-M take?
Catalogue values for 6326 M: dynamic C 229 kN, static C0 216 kN, fatigue limit Pu 6.3 kN. Use C in life calculation and C0 for static checks at 130 mm bore.
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.