6316-2RS bearing: complete specifications & equivalents
The 6316-2RS is a ISO 15 radial bearing sized 80 x 170 x 39 mm (bore x OD x width) with 2RS sealing. 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 | 2RS |
| 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 |
| Limiting speed (mechanical) | 2600 rpm |
| Operating temperature | -30 to +110 °C |
| Mass | 3700 g |
| Manufacturer designation | SKF 6316-2RS1 |
| 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 | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | ISO 15 boundary-dimension envelope; seal suffix convention varies by brand (2RS / DDU / LLU / 2RSR) — verify seal design and temperature range before substituting. |
| 6316-2RS-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-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 80×170×39 mm envelope per ISO 15; seal variant differs (2RS vs OPEN) — confirm sealing suits the duty. |
| 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 (2RS 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 (2RS vs ZZ) — confirm sealing suits the duty. |
| 6316-2RS-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-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 80×170×39 mm envelope per ISO 15; seal variant differs (2RS vs OPEN) — confirm sealing suits the duty. |
| 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 (2RS 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 (2RS 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 6316-2RS model number is decoded
6316-2RS is closed by two contacting elastomer lips over a lifetime grease fill; the lips add friction, so the speed ceiling sits below the open execution. 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. SKF's contact-seal catalogue number is 6316-2RS1 (older text: -2RS1), mapped here from the industry-neutral -2RS spelling.
Typical equipment & failure modes
Common applications
- heavy conveyors
- pulp and paper machinery
- medium and heavy industrial drives
- large gearboxes
Known failure patterns
- seal-lip hardening and loss of pre-grease in sustained high-temperature service
- grease-life expiry in the sealed-for-life cavity (no relubrication path)
- false brinelling from vibration while the shaft is stationary
- fretting corrosion on a loose shaft seat
Selection pitfalls — read before you substitute
- At 80 mm bore the ring mass is significant: heat 6316 on an induction heater (max 120 °C), never over an open flame, and plan puller access or a withdrawal sleeve now for the day it has to come off again.
- The 63xx medium section at 80 mm bore gains dynamic rating through larger rolling elements on a 170 mm OD; the penalty is mass and a lower limiting speed than the 6216 — do not specify it for speed-critical shafts.
- Heat is the enemy of the sealed 6316-2RS: sustained running near the lip temperature limit hardens the rubber, after which grease escapes and dirt tracks in — watch the housing temperature in hot drives.
- Never wash a sealed 6316-2RS in solvent or press it home via the outer ring; solvent destroys the grease thickener and mounting force through the seal deforms the lip.
- Never mix components between two 6316-2RS units: rings, cage and balls are factory-matched and are not field-interchangeable, even between identical designations.
- Suffixes stack in a defined order — clearance follows the seal code, e.g. 6316-C3. No clearance suffix means normal CN clearance.
- SKF catalogues the contact-sealed version as 6316-2RS1 (older printings may read -2RS1); it is shipped pre-greased and its 2600 r/min limiting speed is set by seal-lip drag and grease life versus the open bearing's 8500 r/min thermal reference speed. The single-seal catalogue number is 6316-RS1, used where one shaft side needs external relubrication.
- A one-seal execution 6316-RS1 exists for arrangements that lubricate through the open side; fitting 6316-2RS1 instead means lifetime grease and no external oil supply — mixing the two in the same shaft can starve the sealed position.
- 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 6316-2RS bearing?
A 6316-2RS 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 fitted with two contact rubber seals and is normally pre-greased.
How should 6316-2RS 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 6316-2RS need?
6316-2RS is supplied pre-greased for life and is not designed to be opened for relubrication; where a relubrication path is required, specify the open 6316 with a housing grease fitting instead.
How does the 6316 bore code work?
The last two digits of 6316 are bore code 16, giving 16 × 5 = 80 mm bore. The 170 mm outside diameter and 39 mm width follow the ISO 15 diameter series, not the bore code alone.
What is the SKF designation and catalogue data for 6316-2RS?
In the SKF Rolling Bearings catalogue this size is listed as 6316-2RS1 — two contact elastomer seals over a lifetime grease fill, 80×170×39 mm per ISO 15. Quoted values: C 130 kN, C0 86.5 kN, Pu 3.25 kN, limiting speed 2600 r/min, mass 3700 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 6316-2RS.
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.