6316-M bearing: complete specifications & equivalents
The 6316-M 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 |
| Tolerance class | P0 |
| Cage | brass |
| 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) | 7500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 4400 g |
| Manufacturer designation | 6316 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 | 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-RSR | NSK | full Dimensions and internal design equivalent — standard interchange. | NSK counterpart NSK 6316VV on the same 80×170×39 mm envelope with ratings within 10 % — interchange after checking seal, cage and precision details on both pages. |
| 316 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 80×170×39 mm envelope as SKF 316, but catalogue C/C0 differ (130/86.5 kN vs 138/129 kN) — envelope match only after a load check. |
| 316-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 80×170×39 mm envelope as SKF 316-2Z, but catalogue C/C0 differ (130/86.5 kN vs 138/129 kN) — envelope match only after a load check. |
| 6316 | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6316 (open arrangement) shares the 80×170×39 mm envelope with ratings within 10 % — execution variant of the same size; boundary dimensions interchangeable. |
| 6316-ZZ | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6316-2Z (two non-contact shields) shares the 80×170×39 mm envelope with ratings within 10 % — execution variant of the same size; boundary dimensions interchangeable. |
| 6316-2RS | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF SKF 6316-2RS1 (two contact elastomer seals) shares the 80×170×39 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 6316-M model number is decoded
In the 6300-series, the last two digits encode the bore: 6316 carries code 16 = 80 mm (code × 5). The envelope is 80×170×39 mm (3.15×6.693×1.535 in) with a 45.0 mm radial section height, C 130 kN, C0 86.5 kN and Pu 3.25 kN. The open 6316 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 7500 r/min, catalogue mass 4400 g.
Typical equipment & failure modes
Common applications
- industrial electric motors
- gearboxes and speed reducers
- centrifugal and positive-displacement pumps
- material-handling equipment
Known failure patterns
- contamination wear when the open arrangement is used without external seals
- lubricant starvation where no regreasing interval is maintained
- brinelling from static overload or hammer blows during mounting
- false brinelling from vibration while the shaft stands idle
Selection pitfalls — read before you substitute
- Catalogue ratings for 6316-M (C 130 kN, C0 86.5 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.
- The fatigue load limit is 3.25 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
- The M suffix on 6316-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 4400 g quoted mass includes the heavier cage.
- Open 6316-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 6316-M; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- Mount by heating the inner ring (max 120 °C) — driving 6316-M home through the outer ring or balls brinells the raceways.
Frequently asked questions
What are the dimensions of 6316-M?
The SKF 6316 M measures 80 mm bore × 170 mm OD × 39 mm width (3.15 × 6.693 × 1.535 in), mass about 4400 g. It is open, with no shields or seals.
How does the bore code in 6316 work?
The final two digits of 6316 are bore code 16, multiplied by 5 to give 80 mm.
Which fits should I use for 6316-M?
With a rotating inner ring use roughly k5 on the shaft and H7 in the 170 mm housing; reverse the interference if the outer ring rotates.
How heavy is 6316-M?
Catalogue mass is 4400 g for 6316 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.