24188-ECAK30-W33 bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.3 withdrawal-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. 9.3 withdrawal-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 24188-ECAK30-W33 model number is decoded

The SKF 24188 ECAK30/W33 is a 440×720×280 mm spherical roller bearing with a 1:30 tapered bore — SKF catalogue execution for sleeve mounting on a 440 mm plain shaft, retaining the double-row self-aligning barrel-roller design. The code breaks down as type digit 2 (double-row spherical roller), dimension series 41 (dimension series 41 (medium OD, maximum width)), and bore code 88 = 440 mm; dimensions 440×720×280 mm therefore match the ISO 15 envelope. Reading the suffix on 24188-ecak30-w33, the K30 (or EK/CCK30) element changes only the bore — 1:30 taper for sleeve mounting — while the rest of the suffix chain (CC cages with W33 groove) keeps the same internal design, cage and W33 relubrication features as the cylindrical-bore 24188-ecak30-w33. The 140.0 mm radial section height ((720−440)/2) and 490000 g catalogue mass frame a 440 mm bore bearing rated at 7777 kN C — roughly 17.68 kN of dynamic capacity per millimetre of bore before application factors. After drive-up, re-check radial clearance and then swing the outer ring through its self-aligning range: the sphered raceway of the 24188-ecak30-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 440 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 24100-series series at 440 mm bore (720×280 mm) is the heaviest medium-OD execution, built for extreme radial and shock loads at low speed; the 450 r/min ceiling is part of the design, not an afterthought — check it before using it in a faster drive.
• A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 280 mm-wide roller rows with feeler gauges — do not simply tighten the KM nut until vibration stops.
• The adapter sleeve is selected by actual shaft diameter, not by the 440 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 24188-ecak30-w33 with different sleeves.
• Open spherical roller bearings rely on the housing seals; in screening or crusher duty a failed seal lets grit into the sphered raceway and the 24188-ecak30-w33 pits long before its L10 life.
• The 7777/13200 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 24188 ECAK30/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.