6314 bearing: complete specifications & equivalents
The 6314 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 / C3 available |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| 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 +150 °C |
| Mass | 2550 g |
| Manufacturer designation | SKF 6314 |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-25 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-24
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 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier. |
| 6314-2RS-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 70×150×35 mm envelope per ISO 15; seal variant differs (OPEN vs 2RS) — confirm sealing suits the duty. |
| 6314-NSK | NSK | 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. |
| 6314-RSR | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 70×150×35 mm envelope per ISO 15; seal variant differs (OPEN vs RSR) — confirm sealing suits the duty. |
| 6314-ZZ-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 70×150×35 mm envelope per ISO 15; seal variant differs (OPEN vs ZZ) — confirm sealing suits the duty. |
| 6314-2RS-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 70×150×35 mm envelope per ISO 15; seal variant differs (OPEN vs 2RS) — confirm sealing suits the duty. |
| 6314-NTN | 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. |
| 6314-RSR-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 70×150×35 mm envelope per ISO 15; seal variant differs (OPEN vs RSR) — confirm sealing suits the duty. |
| 6314-ZZ-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 70×150×35 mm envelope per ISO 15; seal variant differs (OPEN vs ZZ) — confirm sealing suits the duty. |
| 7314 | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | — |
| NU314 | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | — |
| 21314 | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | — |
| 6314-M | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF 6314 M (machined brass cage, open arrangement) is the same-size execution on the 70×150×35 mm envelope with ratings within 10 % — boundary dimensions interchangeable. |
| 314 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF 314 shares the 70×150×35 mm envelope but catalogue C/C0 differ — envelope match only after a load check. |
| 314-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF 314-2Z shares the 70×150×35 mm envelope but catalogue C/C0 differ — envelope match only after a load check. |
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 model number is decoded
In the 6300-series (diameter series 3 of ISO 15) the last two digits encode the bore: 6314 carries bore code 14 = 70 mm. Outside diameter 150 mm and width 35 mm come from the ISO 15 boundary-dimensions general plan. With no seal suffix the bearing is open: no shields or seals are fitted and lubrication is supplied by the application. For normal-load mounting with a rotating inner ring on a 70 mm shaft, typical catalogue practice is a k5 shaft seat with an H7 housing bore — verify against the actual load direction and magnitude. In the SKF catalogue this open execution carries the bare designation; protected variants are ordered separately as -2Z and -2RSH.
Typical equipment & failure modes
Common applications
- gearboxes and speed reducers
- conveyor drives
- material-handling equipment
- industrial fans
Known failure patterns
- contamination wear from dust and dirt ingress through the open arrangement
- lubricant starvation when no regreasing interval is maintained
- rolling-contact fatigue spalling after the rated L10 life is exceeded
- brinelling from static overload or hammering during mounting
Selection pitfalls — read before you substitute
- At 70 mm bore, induction heating to roughly 80–100 °C is the clean mounting method; never exceed 120 °C, and hold 6314 against the shaft shoulder while it cools so the ring cannot creep back.
- The 63xx medium section at 70 mm bore gains dynamic rating through larger rolling elements on a 150 mm OD; the penalty is mass and a lower limiting speed than the 6214 — do not specify it for speed-critical shafts.
- Storage matters for open bearings: 6314 leaves the factory with rust preventive only, so clean it and apply the service grease at assembly even if the rings look oily from the wrapper.
- Open bearings tolerate the highest speeds in the 6300-series but need a defined regreasing interval; run-to-failure lubrication is the dominant cause of early failure in open 6314 units.
- The housing bore for the 150 mm OD should be round within IT7; an oval bore pinches the outer ring of 6314 and shows up later as two-point loaded raceway wear.
- Shaft and housing fillets must clear the bearing chamfer so the 35 mm-wide ring seats square; provide an undercut or withdrawal groove instead of relying on an oversized radius.
- The open 6314 needs external sealing and application-supplied lubrication; in the SKF catalogue the protected variants are separate order numbers 6314-2Z (shields) and 6314-2RSH (contact seals), not suffix-free 6314.
- The 111/68 kN ratings here are SKF Explorer-class figures from catalogue PUB BU/P1 17000/1 EN (Oct 2018); SKF can revise internal geometry and ratings without changing the designation, so treat the catalogue version and date as part of the specification and re-verify for critical drives.
Frequently asked questions
What are the dimensions of a 6314 bearing?
A 6314 deep-groove ball bearing has a 70 mm bore, 150 mm outer diameter and 35 mm width (2.756 × 5.906 × 1.378 in), per ISO 15 boundary dimensions. It is an open bearing with no seals or shields.
How should 6314 be mounted?
Apply the mounting force to the ring being fitted: on a 70 mm shaft seat the press load must pass through the inner-ring face only. Induction heating of the inner ring (max 120 °C) is the clean method at this size. Never strike the outer ring, the cage or the seals.
What lubrication does 6314 need?
The open 6314 is lubricated by the application; a NLGI 2 lithium-soap grease filled to roughly 25–35% of the free volume is the common choice, with a defined relubrication interval.
How does the 6314 bore code work?
The last two digits of 6314 are bore code 14, giving 14 × 5 = 70 mm bore. The 150 mm outside diameter and 35 mm width follow the ISO 15 diameter series, not the bore code alone.
What is the SKF designation and catalogue data for 6314?
In the SKF Rolling Bearings catalogue this size is listed as 6314 — the open (unsealed) execution, 70×150×35 mm per ISO 15. Quoted values: C 111 kN, C0 68 kN, Pu 2.75 kN, limiting speed 6300 r/min, mass 2550 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 6314.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-25. Read our editorial & correction policy.