52232-M bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-28

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018)); 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 52232-M model number is decoded

Listed in SKF 17000 chapter 5, 52232 M is an ISO 104 double-direction thrust ball bearing, 140 mm bore and 225 mm OD on a flat housing seat, standing 90 mm high before installation. Construction is a five-component stack: one central shaft washer with tracks on both faces, two outward-facing housing washers and two cage sets, which lets one housing recess accept thrust from either direction. note the bore of 52232 M is 140 mm by the dimension table: the double-direction series was deliberately aligned to the 51/53 washer sets with shifted codes, so the familiar 04=20 arithmetic does not apply here. M-cage execution: brass machined from solid and ball-centred, giving heavier guidance than the standard pressed retainer at the top end of the thrust-ball range. Envelope 140×225×90 mm (5.512×8.858×3.543 in), 42.5 mm radial section, C 238 kN, C0 830 kN, Pu 22.4 kN. reference speed 900 r/min (thermal) and limiting speed 1,300 r/min (mechanical), catalogue mass 12000 g. Speed band width for this size is 400 r/min between reference and limiting (1.44× ratio); lubrication, preload and heat removal decide where inside that band 52232 M can actually run. Bore-to-OD planning: OD 225 over bore 140 is a 1.61× step for this size, and the 90 mm height gives a bore/height ratio of 1.56; use these ratios when the housing recess around the 140 mm shaft is the first constraint. Load balance: C0 830 kN against C 238 kN gives a 3.49 ratio — thrust ball bearings are chosen on static rating and F_a/C0 far more often than on L10 life, while Pu 22.4 kN enters the adjusted-life check. Rating split for documentation: dynamic 238 kN (L10 life), static 830 kN (safety factor s0), fatigue limit 22.4 kN (adjusted life) — three different uses of three different numbers for 52232 M, none interchangeable with another. Stack/annulus proportions: the 90 mm axial stack over the 24,367 mm² washer annulus gives 3.69 mm of height per annular square millimetre ×10⁻³, and at 12000 g the bearing holds about 69.2 kN of C0 per kilogram. Heavy double-direction note: the M suffix on a 52/54-series bearing means both ball-cage assemblies are machined brass and ball-centred for the largest bidirectional positions; both cage sets share the same lubrication requirement, so the oil or grease feed must reach the upper as well as the lower track on vertical shafts. With 12000 g rotating partially with the shaft, check the rotor-balance influence of the central shaft washer at speeds approaching 1,300 r/min; the two loose washers do not rotate and contribute no imbalance.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Torque the cover to leave the catalogue axial freedom, never solid: a clamped double-direction stack cannot float to its thermal position, and at 1,300 r/min even a small thermal thrust preload smears the hottest track.
• Service both cage sets together: replacing only the noisy side while leaving the worn 830 kN opposite track in place reproduces the failure within weeks — inspect both shaft-washer faces and both loose washers at removal.
• Where shaft and housing cannot be kept square, the sphered 54-series execution of the same bore with two U seat washers is the self-aligning counterpart; the flat 52200 unit has no alignment capacity.
• Do not replace a 52232 with two single-direction 51-series bearings without re-checking the arrangement: envelope heights, seat details and catalogue ratings differ, even at the same 140×225 mm bore and OD.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for 52232 M as the double flat brass execution; other order numbers of the 52232 size are different products and may carry different ratings or seating geometry — always quote the full designation when purchasing.