21319 bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.1 spherical roller bearings) · extracted 2026-09-26

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.1 spherical roller bearings); 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 model number is decoded

For a 95 mm shaft carrying heavy radial load with misalignment or deflection, SKF lists 21319 under catalogue execution 21319 E: two barrel-roller rows on a sphered outer raceway. Reading the designation: the leading 2 marks a spherical roller bearing, the 13 is the ISO 15 dimension series (dimension series 13 (heavy OD, normal width)), and the last two digits encode the 95 mm bore; the 200 mm OD and 45 mm width follow the ISO 15 general plan. The trailing E is the SKF optimized internal design: larger rollers and a stamped window-type steel cage give higher load ratings than the older CC geometry; EK is the same bearing with a 1:12 tapered bore for adapter sleeves. At 3,400 r/min reference speed the 52.5 mm-section 21319 is governed thermally by lubricant flow through the W33 groove and the two-row roller complement; grease or oil selection should be made against that value, with 4,500 r/min as the mechanical ceiling. The cylindrical-bore execution here seats directly on the shaft journal; if the application calls for an adapter sleeve, order the tapered-bore 21319 EK variant instead and measure the drive-up or clearance reduction, not the nut torque.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 95 mm bore 21319 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.
• Never use the tapered-bore EK/K variant's drive-up figures on this cylindrical-bore 21319; clearance reduction targets differ, and over-driving a cylindrical bore onto an oversized journal cracks the inner ring.
• 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 exact execution (21319 E); SKF can revise internal geometry without changing the order number, so keep the catalogue version (SKF catalogue PUB BU/P1 17000) with the specification and re-verify for critical drives.
• SKF lists several executions of 21319 (cylindrical bore as listed, tapered-bore 21319 EK variant, plus sealed and vibrating-screen options in the same envelope); they are not interchangeable order numbers — quote the full 21319 E designation when purchasing.