6316 bearing: complete specifications & equivalents
The 6316 is a ISO 15 radial bearing sized 80 x 170 x 39 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 80 mm |
| Outer diameter D | 170 mm |
| Width B | 39 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 | 130 kN |
| Basic static load rating C0 | 86.5 kN |
| Fatigue load limit Pu | 3.25 kN |
| Reference speed (thermal) | 8500 rpm |
| Limiting speed (mechanical) | 5300 rpm |
| Operating temperature | -40 to +150 °C |
| Mass | 3650 g |
| Manufacturer designation | SKF 6316 |
| 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 | 3.15 in |
|---|---|
| Outer diameter D | 6.693 in |
| Width B | 1.535 in |
| ISO bore code | 16 |
| Radial section height (D−d)/2 | 45 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) | 23 of 40 |
| Bore above smallest 6300-series size | 78 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6316 | 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. |
| 6316-2RS-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 80×170×39 mm envelope per ISO 15; seal variant differs (OPEN vs 2RS) — confirm sealing suits the duty. |
| 6316-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. |
| 6316-RSR | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 80×170×39 mm envelope per ISO 15; seal variant differs (OPEN vs RSR) — confirm sealing suits the duty. |
| 6316-ZZ-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 80×170×39 mm envelope per ISO 15; seal variant differs (OPEN vs ZZ) — confirm sealing suits the duty. |
| 6316-2RS-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 80×170×39 mm envelope per ISO 15; seal variant differs (OPEN vs 2RS) — confirm sealing suits the duty. |
| 6316-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. |
| 6316-RSR-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 80×170×39 mm envelope per ISO 15; seal variant differs (OPEN vs RSR) — confirm sealing suits the duty. |
| 6316-ZZ-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 80×170×39 mm envelope per ISO 15; seal variant differs (OPEN vs ZZ) — confirm sealing suits the duty. |
| 7316 | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | — |
| NU316 | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | — |
| 21316 | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | — |
| 6316-M | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF 6316 M (machined brass cage, open arrangement) is the same-size execution on the 80×170×39 mm envelope with ratings within 10 % — boundary dimensions interchangeable. |
| 316 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF 316 shares the 80×170×39 mm envelope but catalogue C/C0 differ — envelope match only after a load check. |
| 316-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF 316-2Z shares the 80×170×39 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 6316 model number is decoded
6316 is supplied open, without shields or seals, so the arrangement around it must supply and retain the lubricant. Within the medium 63xx section (diameter series 3 of ISO 15), multiplying bore code 16 by five gives the 80 mm bore; the 170 mm outside diameter and 39 mm width follow the same boundary-dimension plan. For a rotating inner ring on a 80 mm shaft under normal load, catalogue practice seats it on a k5 shaft fit with an H7 housing bore — confirm against the actual load direction and magnitude before committing. 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
- industrial fans and blowers
- hoists and winches
- heavy conveyors
- pulp and paper machinery
Known failure patterns
- contamination wear from dust and dirt ingress through the open arrangement
- lubricant starvation when no regreasing interval is maintained
- fretting corrosion on a loose shaft seat
- cage damage from operation beyond the limiting speed
Selection pitfalls — read before you substitute
- Mount this 80 mm bore bearing by heating the inner ring (induction heater, max 120 °C) — never drive it home through the outer ring or balls, that brinells the raceways.
- The 63xx medium series gains rating at 80 mm bore through a 170 mm OD and 39 mm width; the heavier rolling elements also trade away some speed versus a 6216.
- The open 6316 has no lubricant retention: grease escapes and contaminants migrate straight into the 80×170×39 mm raceway, so specify a sealed arrangement for dusty or washdown duty.
- 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 6316 units.
- Assign fits by which ring rotates: an interference shaft fit for a rotating inner ring; if the outer ring rotates instead, reverse the logic — a loose rotating ring creeps and frets its seat.
- Grease compatibility is not guaranteed between fills: mixing lithium and polyurea thickeners in a 6300-series position can soften the mixture and leak — clean out the old fill before switching grease types.
- The open 6316 needs external sealing and application-supplied lubrication; in the SKF catalogue the protected variants are separate order numbers 6316-2Z (shields) and 6316-2RSH (contact seals), not suffix-free 6316.
- The 130/86.5 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 6316 bearing?
A 6316 deep-groove ball bearing has a 80 mm bore, 170 mm outer diameter and 39 mm width (3.15 × 6.693 × 1.535 in), per ISO 15 boundary dimensions. It is an open bearing with no seals or shields.
What internal clearance does 6316 have?
Unless a clearance suffix says otherwise, 6316 is manufactured to normal (CN) radial internal clearance. Tight fits and hot shafts consume clearance in service — for those conditions order the C3 execution of 6316 and verify the residual clearance after mounting.
How should 6316 be mounted?
Apply the mounting force to the ring being fitted: on a 80 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 6316 need?
The open 6316 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.
What is the SKF designation and catalogue data for 6316?
In the SKF Rolling Bearings catalogue this size is listed as 6316 — the open (unsealed) execution, 80×170×39 mm per ISO 15. Quoted values: C 130 kN, C0 86.5 kN, Pu 3.25 kN, limiting speed 5300 r/min, mass 3650 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 6316.
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.