32230 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 32230 model number is decoded

SKF 32230 (SKF 32230) is the heavy section tapered roller choice for a 150 mm shaft — one row of tapered rollers on an asymmetric raceway inside the 270×77 mm ISO 355 envelope.On the SKF nameplate, 32230 follows the ISO 355 convention: 3 for the tapered-roller type, 22 for the heavy section, final digits 30 for the 150 mm bore. SKF lists the plain number as the basic execution; letter suffixes such as B denote a steeper contact angle and are different order numbers. Selection arithmetic: the C0/C ratio is about 1.46 (static 1140 kN against dynamic 782 kN), typical of a tapered roller sized for axial capacity, and the 112 kN fatigue load limit Pu is the equivalent-load floor used in the life calculation. Fit selection follows the rotating ring — interference on a rotating cone — and two 32230 units are required to take reversing thrust; keep the induced axial load inside the rated capacity when calculating the pair. Journal and housing interface: the 150 mm bore takes a m6 shaft seat (upper deviation ~0.300 mm for this diameter range) and the 270 mm outside diameter pairs with an H7 housing bore tolerance band of 270.000/270.020 mm; the 77 mm width defines the shoulder depth, and the 18000 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 150 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 150 mm bore (270×77 mm) is a wider, higher-capacity section than 30230; do not substitute without re-checking shaft shoulder diameters and pair setting.
• Setting is a design value, not an assembly feel: excessive preload in the 32230 pair raises operating temperature and can trigger thermal runaway, while too little lets the rollers skid and smear the raceway under light load.
• At the 782 kN rating of 32230, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 2,400 r/min speed end and heavier preload only where moment stiffness dominates.
• Catalogue reference speed and limiting speed are different limits: the 1,700 r/min reference is a thermal criterion under load, while the 2,400 r/min limiting value is the mechanical ceiling — observe both.
• The 782/1140 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 32230 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 32230 designation when purchasing and match the execution to the mounting arrangement.