23276-CAK-W33 bearing: complete specifications & equivalents

Specification table

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.

Cross references & equivalents

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 23276-CAK-W33 model number is decoded

In SKF catalogue PUB BU/P1 17000, 23276-cak-w33 denotes the tapered-bore version (K suffix, taper 1:12) of the 23200-series spherical roller bearing: dimensioned 380×680×240 mm, it seats on an adapter or withdrawal sleeve rather than directly on a machined journal. Numbering ties the bearing to its envelope: 23276-cak-w33 means spherical-roller type, dimension series 32, 380 mm bore — which is why the 680×240 mm outline swaps dimensionally with other ISO 15 bearings of the same code. Reading the suffix on 23276-cak-w33, the K (or EK/CCK) element changes only the bore — 1:12 taper for sleeve mounting — while the rest of the suffix chain (CA machined-brass-cage design with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 23276-cak-w33. Selection arithmetic: the C0/C ratio is about 1.49 (static 9150 kN against dynamic 6126 kN), typical of a spherical roller sized for heavy combined loads, and the 620 kN fatigue load limit Pu is the equivalent-load floor used in the life calculation. After drive-up, re-check radial clearance and then swing the outer ring through its self-aligning range: the sphered raceway of the 23276-cak-w33 must still tilt ≈ 0.5–2.5° freely — a joint that binds after sleeve mounting signals excessive drive-up or a cocked sleeve.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 380 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 23200-series series at 380 mm bore (680×240 mm) adds still more width for shock-loaded and vibratory loads; it does not interchange with a 231 bearing of the same bore because the 240 mm width changes abutment spacing, even though the 680 mm OD matches.
• Never apply the drive-up or clearance-reduction figures for this 1:12 tapered 23276-cak-w33 to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.
• A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 240 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.
• Never use the tapered-bore EK/K variant's drive-up figures on this cylindrical-bore 23276-cak-w33; clearance reduction targets differ, and over-driving a cylindrical bore onto an oversized journal cracks the inner ring.
• The 6126/9150 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 23276 CAK/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.