33113R bearing: complete specifications & equivalents
The 33113R is a ISO 355 radial bearing sized 65 x 110 x 34 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 | 110 mm |
| Width B | 34 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 175 kN |
| Basic static load rating C0 | 208 kN |
| Fatigue load limit Pu | 24 kN |
| Reference speed (thermal) | 4800 rpm |
| Limiting speed (mechanical) | 5600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1300 g |
| Manufacturer designation | SKF 33113 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 | 4.331 in |
| Width B | 1.339 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 22.5 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 |
|---|---|---|---|
| 33113 | 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 33113R model number is decoded
The SKF 33113 R is a 65×110×34 mm flanged single-row tapered roller bearing — a separable cone-and-cup unit whose cup carries an integral axial-location flange for through-bored housings.Numbering ties the bearing to its envelope: 33113 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 110 mm OD. The flange face is ground square to the cup raceway; when pulling the assembly datum from the flange, verify the housing face runout so the 34 mm-wide cup is not tilted against the cone. The 22.5 mm radial section height ((110−65)/2) and 1300 g catalogue mass frame a 65 mm bore bearing rated at 175 kN C — roughly 2.69 kN of dynamic capacity per millimetre of bore before application factors. Load system: C 175 kN against C0 208 kN gives a 1.19 balance, and 2.69 kN of dynamic capacity per millimetre of the 65 mm bore is the density figure to compare against neighbouring sizes. Fit selection follows the rotating ring: a rotating cone on the 65 mm shaft takes a k5 seat; the flanged cup is clamped through its flange and does not need a tight housing fit on the 110 mm OD.
Typical equipment & failure modes
Common applications
- heavy industrial gearboxes and speed reducers
- large process pump and compressor shafts
- rolling-mill auxiliary drives
- crane sheave and hoist gearboxes
Known failure patterns
- preload loss as the mounted pair relaxes, letting rollers skid and smear the raceways
- false brinelling on idle paired sets exposed to machine vibration
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- rolling-contact fatigue spalling after the rated L10 life is exceeded
- rib-roller contact scoring from loss of the EP additive film
Selection pitfalls — read before you substitute
- A plain 33113 bearing is not a spare for 33113R where the flange provides the axial register: same envelope, different location concept — verify the housing design before substituting.
- The flange face of 33113R is the axial datum: protect it in handling — a nicked flange face tilts the cup in the housing and shows up as edge loading on the 110 mm OD raceway.
- Check housing face runout where the flange seats: a face out of square cocks the 34 mm-wide cup and concentrates load on one rib — the usual root cause of early flanged-bearing noise.
- The 175/208 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 33113 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 33113R?
The SKF 33113 R is a single-row tapered roller bearing with a flanged outer ring with 65 mm bore, 110 mm outer diameter and 34 mm overall width (2.559 × 4.331 × 1.339 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 175 kN, C0 208 kN, fatigue load limit Pu 24 kN, reference speed 4,800 r/min, limiting speed 5,600 r/min, mass about 1.30 kg.
What does the flanged outer ring on 33113R do?
The cup of 33113R 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 33113 bearing.
Is 33113R interchangeable with the plain 33113 bearing?
The boundary dimensions 65×110×34 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 33113R 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 33113R?
For a rotating cone on the 65 mm shaft, use a k5 seat; the flanged cup is retained through the flange, so the 110 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.