6314-M bearing: complete specifications & equivalents
The 6314-M is a ISO 15 radial bearing sized 70 x 150 x 35 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 70 mm |
| Outer diameter D | 150 mm |
| Width B | 35 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 111 kN |
| Basic static load rating C0 | 68 kN |
| Fatigue load limit Pu | 2.75 kN |
| Reference speed (thermal) | 9500 rpm |
| Limiting speed (mechanical) | 6300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 3100 g |
| Manufacturer designation | 6314 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 | 2.756 in |
|---|---|
| Outer diameter D | 5.906 in |
| Width B | 1.378 in |
| ISO bore code | 14 |
| Radial section height (D−d)/2 | 40 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) | 21 of 40 |
| Bore above smallest 6300-series size | 68 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6314-RSR | NSK | full Dimensions and internal design equivalent — standard interchange. | NSK counterpart NSK 6314VV on the same 70×150×35 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 314 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 70×150×35 mm envelope as SKF 314, but catalogue C/C0 differ (111/68 kN vs 114/102 kN) — envelope match only after a load check. |
| 314-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 70×150×35 mm envelope as SKF 314-2Z, but catalogue C/C0 differ (111/68 kN vs 114/102 kN) — envelope match only after a load check. |
| 6314 | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6314 (open arrangement) shares the 70×150×35 mm envelope with ratings within 10 % — execution variant of the same size; boundary dimensions interchangeable. |
| 6314-ZZ | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6314-2Z (two non-contact shields) shares the 70×150×35 mm envelope with ratings within 10 % — execution variant of the same size; boundary dimensions interchangeable. |
| 6314-2RS | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6314-2RS1 (two contact elastomer seals) shares the 70×150×35 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 6314-M model number is decoded
In the 6300-series, the last two digits encode the bore: 6314 carries code 14 = 70 mm (code × 5). The envelope is 70×150×35 mm (2.756×5.906×1.378 in) with a 40.0 mm radial section height, C 111 kN, C0 68 kN and Pu 2.75 kN. The open 6314 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 6300 r/min, catalogue mass 3100 g.
Typical equipment & failure modes
Common applications
- centrifugal and positive-displacement pumps
- material-handling equipment
- industrial fans
- compressor drives
Known failure patterns
- contamination wear when the open arrangement is used without external seals
- lubricant starvation where no regreasing interval is maintained
- edge loading from shaft deflection or housing misalignment
- rolling-contact fatigue spalling once the catalogue L10 life is exceeded
Selection pitfalls — read before you substitute
- Deep-groove geometry tolerates only minutes of misalignment; if the 150 mm housing bore cannot be aligned, move to a self-aligning bearing rather than shimming 6314-M.
- Assign interference to the rotating ring: on a conventional shaft-mounted 70 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.
- The M suffix on 6314-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 3100 g quoted mass includes the heavier cage.
- Open 6314-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 6314-M; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- Catalogue ratings for 6314-M (C 111 kN, C0 68 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.
Frequently asked questions
What are the dimensions of 6314-M?
The SKF 6314 M measures 70 mm bore × 150 mm OD × 35 mm width (2.756 × 5.906 × 1.378 in), mass about 3100 g. It is open, with no shields or seals.
How does the bore code in 6314 work?
The final two digits of 6314 are bore code 14, multiplied by 5 to give 70 mm.
Which fits should I use for 6314-M?
With a rotating inner ring use roughly k5 on the shaft and H7 in the 150 mm housing; reverse the interference if the outer ring rotates.
How heavy is 6314-M?
Catalogue mass is 3100 g for 6314 M; seal and cage executions of the same envelope differ by a few grams.
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.