6313-2RS bearing: complete specifications & equivalents
The 6313-2RS is a ISO 15 radial bearing sized 65 x 140 x 33 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 | 65 mm |
| Outer diameter D | 140 mm |
| Width B | 33 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 | 97.5 kN |
| Basic static load rating C0 | 60 kN |
| Fatigue load limit Pu | 2.5 kN |
| Limiting speed (mechanical) | 3200 rpm |
| Operating temperature | -30 to +110 °C |
| Mass | 2150 g |
| Manufacturer designation | SKF 6313-2RS1 |
| 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 | 2.559 in |
|---|---|
| Outer diameter D | 5.512 in |
| Width B | 1.299 in |
| ISO bore code | 13 |
| Radial section height (D−d)/2 | 37.5 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) | 20 of 40 |
| Bore above smallest 6300-series size | 63 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6313 | 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. |
| 6313-2RS-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. |
| 6313-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 65×140×33 mm envelope per ISO 15; seal variant differs (2RS vs OPEN) — confirm sealing suits the duty. |
| 6313-RSR | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 65×140×33 mm envelope per ISO 15; seal variant differs (2RS vs RSR) — confirm sealing suits the duty. |
| 6313-ZZ-NSK | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 65×140×33 mm envelope per ISO 15; seal variant differs (2RS vs ZZ) — confirm sealing suits the duty. |
| 6313-2RS-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. |
| 6313-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 65×140×33 mm envelope per ISO 15; seal variant differs (2RS vs OPEN) — confirm sealing suits the duty. |
| 6313-RSR-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 65×140×33 mm envelope per ISO 15; seal variant differs (2RS vs RSR) — confirm sealing suits the duty. |
| 6313-ZZ-NTN | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 65×140×33 mm envelope per ISO 15; seal variant differs (2RS vs ZZ) — confirm sealing suits the duty. |
| 7313 | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | — |
| NU313 | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | — |
| 21313 | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | — |
| 6313-M | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF 6313 M (machined brass cage, open arrangement) is the same-size execution on the 65×140×33 mm envelope with ratings within 10 % — boundary dimensions interchangeable. |
| 313 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF 313 shares the 65×140×33 mm envelope but catalogue C/C0 differ — envelope match only after a load check. |
| 313-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF 313-2Z shares the 65×140×33 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 6313-2RS model number is decoded
6313-2RS 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 13 by five gives the 65 mm bore; the 140 mm outside diameter and 33 mm width follow the same boundary-dimension plan. For a rotating inner ring on a 65 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 6313-2RS1 (older text: -2RS1), mapped here from the industry-neutral -2RS spelling.
Typical equipment & failure modes
Common applications
- centrifugal and positive-displacement pumps
- gearboxes and speed reducers
- conveyor drives
- material-handling equipment
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)
- 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
- Interference on a 65 mm shaft plus running heat consumes radial clearance: where the shaft runs hot or the fit is tight, order 6313 with C3 clearance and re-check the residual value after mounting.
- The 63xx medium series gains rating at 65 mm bore through a 140 mm OD and 33 mm width; the heavier rolling elements also trade away some speed versus a 6213.
- Heat is the enemy of the sealed 6313-2RS: 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 6313-2RS in solvent or press it home via the outer ring; solvent destroys the grease thickener and mounting force through the seal deforms the lip.
- Measure the shaft, do not trust the drawing: a 65 mm nominal journal worn by even 0.02 mm turns an interference seat into a creeping fit that frets the bore of 6313-2RS.
- Do not quieten a noisy bearing by preloading it: the 6300-series is a deep-groove design, not angular-contact; axial preload raises temperature and shortens grease life.
- SKF catalogues the contact-sealed version as 6313-2RS1 (older printings may read -2RS1); it is shipped pre-greased and its 3200 r/min limiting speed is set by seal-lip drag and grease life versus the open bearing's 10000 r/min thermal reference speed. The single-seal catalogue number is 6313-RS1, used where one shaft side needs external relubrication.
- A one-seal execution 6313-RS1 exists for arrangements that lubricate through the open side; fitting 6313-2RS1 instead means lifetime grease and no external oil supply — mixing the two in the same shaft can starve the sealed position.
- The 97.5/60 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 6313-2RS bearing?
A 6313-2RS deep-groove ball bearing has a 65 mm bore, 140 mm outer diameter and 33 mm width (2.559 × 5.512 × 1.299 in), per ISO 15 boundary dimensions. It is fitted with two contact rubber seals and is normally pre-greased.
How does the 6300 compare with other series at the same 65 mm bore?
The '3' is the medium diameter series: 140×33 mm, 37.5 mm radial section at 65 mm bore, carrying more load than a 6213 but needing a larger housing bore and giving up some speed.
Are 6313 bearings from different brands interchangeable?
For boundary dimensions, yes: every brand's 6313 uses the same ISO 15 envelope (65×140×33 mm). Load ratings, limiting speeds, clearance, precision class and sealing design can differ, so verify those in the supplier catalogue when substituting. Seal suffixes also differ by brand (2RS, DDU, LLU, 2RSL and similar).
What internal clearance does 6313-2RS have?
Unless a clearance suffix says otherwise, 6313-2RS 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 6313 and verify the residual clearance after mounting.
What is the SKF designation and catalogue data for 6313-2RS?
In the SKF Rolling Bearings catalogue this size is listed as 6313-2RS1 — two contact elastomer seals over a lifetime grease fill, 65×140×33 mm per ISO 15. Quoted values: C 97.5 kN, C0 60 kN, Pu 2.5 kN, limiting speed 3200 r/min, mass 2150 g. Brand suffixes (2Z, 2RSH, 2RSL) differ from the industry-neutral spelling 6313-2RS.
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.