52234-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 52234-M model number is decoded

Listed in SKF 17000 chapter 5, 52234 M is an ISO 104 double-direction thrust ball bearing, 150 mm bore and 240 mm OD on a flat housing seat, standing 97 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 52234 M is 150 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 150×240×97 mm (5.906×9.449×3.819 in), 45.0 mm radial section, C 270 kN, C0 930 kN, Pu 24 kN. reference speed 850 r/min (thermal) and limiting speed 1,200 r/min (mechanical), catalogue mass 15000 g. Speed planning separates the two ceilings mechanically: the pressed brass cage and balls tolerate 1,200 r/min while thermal balance under catalogue load sets the 850 r/min reference; at dm ≈ 195.0 mm the corresponding dn is approximately 234k mm·r/min. Static-first selection data: 930 kN C0 spread across the 97 mm stack gives 9.6 kN of static rating per height millimetre, and the 15000 g mass/C0 ratio is about 16 g per static kN — crane-hook and screw positions are normally sized on these two figures. Light-load floor: Pu = 24 kN is the equivalent-load threshold below which the SKF adjusted-life equation credits very long life for 52234 M; the number is 9 % of the 270 kN dynamic rating. Load balance: C0 930 kN against C 270 kN gives a 3.44 ratio — thrust ball bearings are chosen on static rating and F_a/C0 far more often than on L10 life, while Pu 24 kN enters the adjusted-life check. Speed-ratio note for this exact unit: the reference speed is 850 r/min against a 1,200 r/min limiting speed, a reference-to-limit ratio of 0.71. 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. The M suffix means BOTH cage sets of the 97 mm stack are machined brass; spare-part orders of one side should still be placed as the complete 52234 M unit, because mixed cage executions in one double-direction stack are not a catalogue configuration.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Do not replace a 52234 with two single-direction 51-series bearings without re-checking the arrangement: envelope heights, seat details and catalogue ratings differ, even at the same 150×240 mm bore and OD.
• Torque the cover to leave the catalogue axial freedom, never solid: a clamped double-direction stack cannot float to its thermal position, and at 1,200 r/min even a small thermal thrust preload smears the hottest track.
• Each direction independently needs the minimum axial load (factor A 5.4): the side that is momentarily unloaded during slow reversal skids first, so arrange preload or symmetry rather than assuming the loaded side drives the idle side.
• The central shaft washer takes the interference fit on the 150 mm shaft while both outer housing washers run loose in their registers; both loose washers need positive axial retention on vertical shafts.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for 52234 M as the double flat brass execution; other order numbers of the 52234 size are different products and may carry different ratings or seating geometry — always quote the full designation when purchasing.