21319-EK 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 21319-EK model number is decoded

For sleeve mounting on a 95 mm shaft, SKF order number SKF 21319 EK is the 1:12 tapered-bore spherical roller bearing in the 21300-series family (dimension series 13 (heavy OD, normal width)); the cylindrical-bore equivalent is a separate order number, 21319. The code breaks down as type digit 2 (double-row spherical roller), dimension series 13 (dimension series 13 (heavy OD, normal width)), and bore code 19 = 95 mm; dimensions 95×200×45 mm therefore match the ISO 15 envelope. Sleeve mounting is why the K execution exists: a plain h9-tolerance shaft is enough because the adapter sleeve supplies the precision seat, and the bearing is removable without pulling over an interference journal — a separate order number from the cylindrical-bore bearing, never a field conversion. The 52.5 mm radial section height ((200−95)/2) and 8250 g catalogue mass frame a 95 mm bore bearing rated at 433 kN C — roughly 4.56 kN of dynamic capacity per millimetre of bore before application factors. At 95 mm bore, dismount after service is by KM locknut reversal or a hydraulic nut on larger sizes; oil-injection grooves on the bigger sleeves let pressurised oil float the 21319-ek off the taper without scoring either surface.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 95 mm bore 21319-ek by induction heating (max 120 °C) or oil injection — driving a bearing of this section home through the rollers brinells both raceways, and the damage only speaks up as vibration hours later.
• The 21300-series series at 95 mm bore (200×45 mm) pairs a heavy OD with a narrow section — a compact way to add capacity, but the shoulder and abutment diameters differ from the 222 series; it is not a drop-in swap.
• A loose sleeve after the first weeks of service usually means inadequate initial drive-up; re-checking clearance without dismounting is possible through the 45 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 95 mm nominal bearing bore: H-sleeve part numbers span a small diameter range, so two different shaft diameters can use the same 21319-ek with different sleeves.
• Catalogue reference speed and limiting speed are different limits: the 3,400 r/min reference is a thermal criterion under load, while the 4,500 r/min limiting value is the mechanical ceiling — observe both.
• The 433/490 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 21319 EK); 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.