32224 bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.1 metric single-row TRB) · extracted 2026-09-28

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.1 metric single-row TRB); 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 32224 model number is decoded

Ordering number SKF 32224 in SKF catalogue PUB BU/P1 17000 denotes a single-row tapered roller bearing for a 120 mm shaft, heavy section, with an open pressed-steel-cage execution and one-direction axial capacity.Reading the designation: the leading 3 marks a single-row tapered roller bearing, the 22 is the ISO 355 diameter/width series (heavy section), and the last two digits encode the 120 mm bore; the 215 mm OD and 61.5 mm width follow the ISO 355 general plan. In SKF suffix language a bare 32224 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. Speed planning uses two different ceilings: 2,400 r/min thermal reference and 3,000 r/min mechanical limiting speed. A single 32224 locates the shaft in one axial direction only; mount it against a second bearing in O (back-to-back) or X (face-to-face) arrangement, and set the running clearance by the mounting procedure — not by feel. Journal and housing interface: the 120 mm bore takes a m6 shaft seat (upper deviation ~0.240 mm for this diameter range) and the 215 mm outside diameter pairs with an H7 housing bore tolerance band of 215.000/215.020 mm; the 61.5 mm width defines the shoulder depth, and the 9050 g cone-plus-cup assembly is the dead load on the shaft during thermal expansion calculations.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 120 mm bore the cone mass is high enough that cocking during mounting damages the cage and rib; guide the ring square, confirm seat contact around the full circumference, and re-check setting after the first thermal cycle of the paired set.
• The 322 series at 120 mm bore (215×61.5 mm) is a wider, higher-capacity section than 30224; do not substitute without re-checking shaft shoulder diameters and pair setting.
• At the 573 kN rating of 32224, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 3,000 r/min speed end and heavier preload only where moment stiffness dominates.
• When the outer ring rotates, reverse the fit logic and provide cup location; the tapered contact of 32224 pushes the rings apart under load, so a non-located cup walks its seat even when the shaft is fixed.
• The 32224 shares its ISO 355 envelope with other tapered bearings of the same code but is not a drop-in replacement for a ball bearing: it cannot run effectively under pure radial load without a minimum axial load, and a deep-groove bearing cannot replace its combined-load duty.
• The 573/695 kN ratings are SKF catalogue 17000 values for the basic execution; SKF can revise internal geometry without changing the order number, so keep the catalogue version (PUB BU/P1 17000/1 EN, 2018) with the specification and re-verify for critical drives.
• SKF lists several executions of 32224 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 32224 designation when purchasing and match the execution to the mounting arrangement.