52228 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 52228 model number is decoded

52228 is SKF's 120 mm-bore double-direction thrust ball bearing in the 52200 series to the ISO 104 dimension plan, with a flat housing seating surface, measuring 120×200×81 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 120 mm bore from the dimension table; codes recur across the 522/523/524 sections and systematically trail the 51/53 code values. with no cage suffix this is the standard execution with a stamped sheet-steel ball-cage assembly (pressed cage) — the light, quiet and economical cage for small and medium thrust-ball sizes. Envelope 120×200×81 mm (4.724×7.874×3.189 in), 40.0 mm radial section, C 190 kN, C0 620 kN, Pu 17.6 kN. reference speed 1,000 r/min (thermal) and limiting speed 1,400 r/min (mechanical), catalogue mass 8650 g. Minimum-load arithmetic: with dm ≈ 160.0 mm and factor A 2, Fam ≈ A·(n·dm/1000)² at the 1,000 r/min reference speed is about 51.2 kN for 52228; below that preload the balls skid and smear the tracks. Selection figures for 52228: the C0/C ratio is 3.26, Pu 17.6 kN is about 9 % of C, and the catalogue mass works out to roughly 72 g per millimetre of bore; the printed minimum-load factor is A 2. Preload at the mechanical ceiling: repeating Fam ≈ A·(n·dm/1000)² with factor A 2 at the 1,400 r/min limiting speed raises the required axial preload to about 100.4 kN; the reference-speed value 51.2 kN is the thermal design point. Stack/annulus proportions: the 81 mm axial stack over the 20,106 mm² washer annulus gives 4.03 mm of height per annular square millimetre ×10⁻³, and at 8650 g the bearing holds about 71.7 kN of C0 per kilogram. Speed-ratio note for this exact unit: the reference speed is 1,000 r/min against a 1,400 r/min limiting speed, a reference-to-limit ratio of 0.71. Double-direction order-number note: the unit is built around one central shaft washer with a ground bore and tracks on both faces, flanked by two housing washers and two independent ball-cage assemblies; observe the assembly orientation (the two housing washers face outwards) and note that a 52-series unit replaces a mirrored pair of 51-series bearings only after the stack height and seat drawings are re-checked. Life accounting for 52228 is done separately per direction: if duty applies 190 kN C predominantly one way, the idle side's skid risk — not the loaded side's L10 — usually sets the relubrication and preload interval.

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 1,400 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 620 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 81 mm total height is not twice a single-direction bearing height, so reuse of old cover dimensions is a trap.
• Do not replace a 52228 with two single-direction 51-series bearings without re-checking the arrangement: envelope heights, seat details and catalogue ratings differ, even at the same 120×200 mm bore and OD.
• Ordering discipline for 52228: the catalogue page quotes 52228 and its 190/620 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.