30313R bearing: complete specifications & equivalents
The 30313R is a ISO 355 radial bearing sized 65 x 140 x 36 mm (bore x OD x width). 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 | 36 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 240 kN |
| Basic static load rating C0 | 228 kN |
| Fatigue load limit Pu | 27.5 kN |
| Reference speed (thermal) | 4000 rpm |
| Limiting speed (mechanical) | 4800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2500 g |
| Manufacturer designation | SKF 30313 R |
| Standard | ISO 355 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.3-8.8 TRB variants |
| Last verified | 2026-09-29 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.3-8.8 TRB variants) · extracted 2026-09-29
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.3-8.8 TRB variants); 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 & flanged-series range
| Bore d | 2.559 in |
|---|---|
| Outer diameter D | 5.512 in |
| Width B | 1.417 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 37.5 mm |
| Smallest bore in flanged-series | 35 mm |
| Largest outer diameter in flanged-series | 140 mm |
| Width range across flanged-series | 19–45.5 mm |
| Bore position in flanged-series (smallest first) | 5 of 5 |
| Bore above smallest flanged-series size | 30 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 30313 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same d/D/T boundary as the plain single-row base bearing, but the flanged cup changes housing location — not a drop-in substitute where the flange is the axial register. |
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 30313R model number is decoded
SKF 30313 R belongs to the SKF flanged tapered-roller range — the 65 mm bore entry dimensioned 140×36 mm, intended for housings where one side has no room for a turned abutment shoulder.Numbering ties the bearing to its envelope: 30313 means tapered-roller type 3 with a 65 mm bore, and the flanged-execution suffix tells the housing designer that axial location is built into the cup at the 140 mm OD. Substitution caution: a plain 30313 bearing cannot replace 30313R where the housing has no shoulder on the flange side — the plain cup would lack axial location even though the 65×140×36 mm boundary matches. At 4,000 r/min reference speed the 37.5 mm-section 30313R is governed thermally by setting and lubricant flow; grease or oil selection should be made against that value, with 4,800 r/min as the mechanical ceiling. Cross-section geometry: the 37.5 mm half-section ((140−65)/2) places the roller pitch diameter near 102 mm, and the 36 mm axial width sets the abutment depth — geometry that fixes the contact angle behaviour of 30313R. Like any single-row tapered bearing, 30313R reacts thrust in one direction only — mount it against a second bearing in O or X arrangement and set the running clearance by procedure, not by feel.
Typical equipment & failure modes
Common applications
- large process pump and compressor shafts
- rolling-mill auxiliary drives
- crane sheave and hoist gearboxes
- marine deck machinery shafts
Known failure patterns
- thermal preload runaway in an O-arrangement pair when inner-ring heat expands the setting
- uneven load sharing in a pair when spacer faces are not parallel to the bore
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- hard-particle indentation of the tapered raceway in unfiltered oil
- brinelling from pressing the cone or cup home through the rollers
Selection pitfalls — read before you substitute
- A plain 30313 bearing is not a spare for 30313R where the flange provides the axial register: same envelope, different location concept — verify the housing design before substituting.
- A plain 30313 bearing is not a spare for 30313R where the flange provides the axial register: same envelope, different location concept — verify the housing design before substituting.
- The flange does not change the one-direction thrust rule: 30313R still needs a second tapered bearing facing it on reversing-thrust shafts, with the running clearance set at mounting.
- The 240/228 kN ratings are SKF catalogue 17000 values for this execution; SKF can revise internal geometry without changing the order number, so keep the catalogue version (PUB BU/P1 17000/1 EN, 2018) with the specification.
- Quote the full SKF 30313 R designation when purchasing — base-number-only orders are ambiguous across executions and variants.
Frequently asked questions
What are the dimensions and catalogue data of 30313R?
The SKF 30313 R is a single-row tapered roller bearing with a flanged outer ring with 65 mm bore, 140 mm outer diameter and 36 mm overall width (2.559 × 5.512 × 1.417 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 240 kN, C0 228 kN, fatigue load limit Pu 27.5 kN, reference speed 4,000 r/min, limiting speed 4,800 r/min, mass about 2.50 kg.
What does the flanged outer ring on 30313R do?
The cup of 30313R carries an integral flange that locates the bearing axially against the housing face, so the housing needs no machined abutment shoulder on the flange side. It simplifies through-bored or cover-mounted housings; the running clearance is still set by cone-versus-cup position at mounting, exactly as for the plain 30313 bearing.
Is 30313R interchangeable with the plain 30313 bearing?
The boundary dimensions 65×140×36 mm match the ISO 355 plan of the base bearing, but the flanged cup is a different order number. It is interchangeable only where the housing provides axial location by other means; where the flange is the locating feature, a plain cup cannot substitute.
Can a single 30313R take axial load in both directions?
No — like any single-row tapered roller bearing it reacts thrust in one direction only, and under radial load its contact angle induces an axial force. Use two bearings as a matched pair (O or X arrangement) for reversing thrust.
What shaft and housing fits suit 30313R?
For a rotating cone on the 65 mm shaft, use a k5 seat; the flanged cup is retained through the flange, so the 140 mm OD seat can be a loose-to-transition fit. Keep housing face runout square so the flange seats without tilting the cup.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.3-8.8 TRB variants on 2026-09-29. Read our editorial & correction policy.