32018-SKF 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 32018-SKF model number is decoded

SKF 32018 X belongs to the SKF single-row tapered roller range — the 90 mm bore entry in the 32000 series, dimensioned 140 mm OD and 32 mm wide to the ISO 355 boundary plan.The code breaks down as type prefix 3 (tapered roller), series 20 (the low-friction section), and bore code 18 = 90 mm; dimensions 90×140×32 mm therefore match the ISO 355 envelope. In SKF suffix language a bare 32018 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. With C 208 kN and C0 270 kN, the 32018 pair-sizing check is dominated by the axial share: keep the equivalent load P below the rating at the required L10, remembering one bearing alone cannot cover reversing thrust at 4,300 r/min. Mounting practice for 32018: the rotating cone takes the interference fit (k5 on a 90 mm shaft), the cup slides for axial location, and reversing-thrust duty demands a paired O/X set rather than one bearing. Dimensional interchange map: within the 32000 series at 90 mm bore, the 140 mm OD and 32 mm width are fixed by the ISO 355 plan, so any same-code bearing from another brand shares the mounting envelope; the 25.0 mm section height distinguishes this family from a 302 or 322 of the same bore, and the 1750 g mass is the minimum—sealed or snap-ring executions add rotating weight above that catalogue baseline.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 90 mm bore 32018 by induction heating of the cone (max 120 °C — the pressed-steel cage sets the ceiling, not the steel); driving it home through the cup or rollers brinells the tapered raceway.
• The 320 series at 90 mm bore (140×32 mm) is the low-friction, higher-speed section; it carries less thrust than a 30218 of the same bore, so verify the axial load share before swapping.
• When the outer ring rotates, reverse the fit logic and provide cup location; the tapered contact of 32018 pushes the rings apart under load, so a non-located cup walks its seat even when the shaft is fixed.
• Do not mix brands or executions inside one 32018 pair — matched sets are ground for a specific setting, and pairing a SKF basic unit with a different suffix variant will not share the setting evenly.
• The 32018 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 208/270 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 32018 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 32018 X designation when purchasing and match the execution to the mounting arrangement.