52230-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 52230-M model number is decoded

52230 M is SKF's 130 mm-bore double-direction thrust ball bearing in the 52200 series to the ISO 104 dimension plan, with a flat housing seating surface, measuring 130×215×89 mm. The unit stacks one central shaft washer (ground bore, tight on the shaft), two outward-facing housing washers and two ball-cage assemblies, reacting axial force in both directions. double-direction 52/54 numbering does NOT decode the bore by the usual single-direction ×5 code — read the 130 mm bore from the dimension table; codes recur across the 522/523/524 sections and systematically trail the 51/53 code values. suffix M identifies a one-piece machined brass cage, ball-centred: the large-size and heavy-section option for higher speeds, shock loads and thin-film lubrication where a pressed cage would distort. Envelope 130×215×89 mm (5.118×8.465×3.504 in), 42.5 mm radial section, C 238 kN, C0 800 kN, Pu 22 kN. reference speed 950 r/min (thermal) and limiting speed 1,300 r/min (mechanical), catalogue mass 11500 g. Track-circle loading: per millimetre of mean track circumference the 238 kN dynamic rating corresponds to roughly 0.44 kN/mm of π·dm track, a useful comparison against the other dimension series of the 130 mm bore. At the printed limiting speed of 1,300 r/min the mean pitch diameter dm ≈ 172.5 mm implies a dn value around 224k mm·r/min; the 950 r/min reference speed is the thermal-planning value under catalogue load. Imperial cross-check for procurement drawings: 5.118 in bore, 8.465 in OD, 3.504 in height, and the 11500 g catalogue mass converts to 11.500 kg (405.6 oz). Rating split for documentation: dynamic 238 kN (L10 life), static 800 kN (safety factor s0), fatigue limit 22 kN (adjusted life) — three different uses of three different numbers for 52230 M, none interchangeable with another. Speed-ratio note for this exact unit: the reference speed is 950 r/min against a 1,300 r/min limiting speed, a reference-to-limit ratio of 0.73. 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 89 mm stack are machined brass; spare-part orders of one side should still be placed as the complete 52230 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

• Service both cage sets together: replacing only the noisy side while leaving the worn 800 kN opposite track in place reproduces the failure within weeks — inspect both shaft-washer faces and both loose washers at removal.
• Observe the stack order at fitting: shaft washer central, the two housing washers facing outwards with a cage set on each side; the 89 mm total height is not twice a single-direction bearing height, so reuse of old cover dimensions is a trap.
• 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.
• 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.
• Ordering discipline for 52230: the catalogue page quotes 52230 M and its 238/800 kN ratings as one exact article; bare-number substitutions from another series or brand need a fresh dimension and rating check, not a like-for-like assumption.