23034-CCK-W33 bearing: complete specifications & equivalents
The 23034-CCK-W33 is a ISO 15 radial bearing sized 170 x 260 x 67 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 170 mm |
| Outer diameter D | 260 mm |
| Width B | 67 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 745 kN |
| Basic static load rating C0 | 1060 kN |
| Fatigue load limit Pu | 100 kN |
| Reference speed (thermal) | 2200 rpm |
| Limiting speed (mechanical) | 2800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 18500 g |
| Manufacturer designation | SKF 23034 CCK/W33 |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions) · extracted 2026-09-26
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions); 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 & 23000-series range
| Bore d | 6.693 in |
|---|---|
| Outer diameter D | 10.236 in |
| Width B | 2.638 in |
| ISO bore code | 34 |
| Radial section height (D−d)/2 | 45 mm |
| Smallest bore in 23000-series | 70 mm |
| Largest outer diameter in 23000-series | 480 mm |
| Width range across 23000-series | 27–121 mm |
| Bore position in 23000-series (smallest first) | 14 of 23 |
| Bore above smallest 23000-series size | 100 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 23034 | SKF | full Dimensions and internal design equivalent — standard interchange. | Tapered-bore (1:12) sleeve-mounted execution of 23034; identical ISO 15 envelope, fits H3034 adapter sleeve on a 110 mm shaft. |
| C3034-M | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF CARB toroidal bearing C 3034 M shares the 170×260×67 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute. |
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 23034-CCK-W33 model number is decoded
SKF lists SKF 23034 CCK/W33 as the adapter-sleeve execution in the 23000-series range: a 170 mm nominal-bore spherical roller bearing whose 1:12 tapered inner ring is driven up a sleeve, with 260 mm OD and 67 mm width to the ISO 15 envelope. Numbering ties the bearing to its envelope: 23034-cck-w33 means spherical-roller type, dimension series 30, 170 mm bore — which is why the 260×67 mm outline swaps dimensionally with other ISO 15 bearings of the same code. The K in the designation marks the 1:12 tapered bore: SKF mounts it on an H-series adapter sleeve (with KM locknut and MB lock washer) on a plain commercial-grade shaft, or on an AH withdrawal sleeve where the bearing must abut a shaft shoulder. Selection arithmetic: the C0/C ratio is about 1.42 (static 1060 kN against dynamic 745 kN), typical of a spherical roller sized for heavy combined loads, and the 100 kN fatigue load limit Pu is the equivalent-load floor used in the life calculation. On an H adapter sleeve the 170 mm shaft seat only needs an h9 plain journal; slide the sleeve into the 23034-cck-w33 inner ring, tighten the KM nut against the MB washer until the catalogue clearance-reduction value is reached, then lock the washer tab.
Typical equipment & failure modes
Common applications
- SAG and ball-mill drive shafts
- large mining crusher main shafts
- long through-shafts in conveyors, where a sleeve seat avoids a precision journal
- stepped shafts fitted with withdrawal sleeves against a fixed shoulder
Known failure patterns
- raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating
- inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range
- fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve
- roller-end scoring from starved lubricant at start-up before the grease channel purges
- hard-particle indentation of the raceway in unfiltered oil or contaminated grease systems
Selection pitfalls — read before you substitute
- At 170 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.
- The 23000-series series at 170 mm bore (260×67 mm) is the slim-OD envelope: it buys radial space but gives up capacity against a 222-series bearing of the same bore — confirm the L10 margin before downsizing into it.
- The adapter sleeve is selected by actual shaft diameter, not by the 170 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 23034-cck-w33 with different sleeves.
- A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 67 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.
- Catalogue reference speed and limiting speed are different limits: the 2,200 r/min reference is a thermal criterion under load, while the 2,800 r/min limiting value is the mechanical ceiling — observe both.
- The 745/1060 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23034 CCK/W33); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification.
Frequently asked questions
What are the dimensions and catalogue data of 23034-cck-w33?
The SKF 23034 CCK/W33 is a double-row spherical roller bearing with a 1:12 tapered bore, 170 mm nominal bore, 260 mm outer diameter and 67 mm width (6.693 × 10.236 × 2.638 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 745 kN, C0 1060 kN, Pu 100 kN, reference speed 2,200 r/min, limiting speed 2,800 r/min, mass about 18500 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft.
What does the K suffix mean on 23034-cck-w33?
K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it.
Which adapter sleeve fits the 23034-cck-w33?
The sleeve is selected by the actual shaft diameter in millimetres, not only by the 170 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size.
How is the 23034-cck-w33 driven up and checked?
Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret.
What is the difference between 23034-cck-w33 and 23034-cc-w33?
They share the ISO 15 envelope and the same 745/1060 kN ratings, but 23034-cck-w33 has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 23034-cc-w33 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions on 2026-09-26. Read our editorial & correction policy.