52224 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 52224 model number is decoded

Listed in SKF 17000 chapter 5, 52224 is an ISO 104 double-direction thrust ball bearing, 100 mm bore and 170 mm OD on a flat housing seat, standing 68 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 52224 is 100 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. no cage suffix means the standard stamped steel retainer — a pressed sheet-metal ball-cage assembly that covers the bulk of the thrust-ball assortment. Envelope 100×170×68 mm (3.937×6.693×2.677 in), 35.0 mm radial section, C 127 kN, C0 390 kN, Pu 11.8 kN. reference speed 1,200 r/min (thermal) and limiting speed 1,700 r/min (mechanical), catalogue mass 5250 g. Section proportions: the 35.0 mm radial section compares with 100 mm of bore (section/bore ≈ 0.35) and the 68 mm height is 1.94× that section — the proportions that identify the 52200 envelope at a glance. Selection figures for 52224: the C0/C ratio is 3.07, Pu 11.8 kN is about 9 % of C, and the catalogue mass works out to roughly 53 g per millimetre of bore; the printed minimum-load factor is A 1. Imperial cross-check for procurement drawings: 3.937 in bore, 6.693 in OD, 2.677 in height, and the 5250 g catalogue mass converts to 5.250 kg (185.2 oz). Preload at the mechanical ceiling: repeating Fam ≈ A·(n·dm/1000)² with factor A 1 at the 1,700 r/min limiting speed raises the required axial preload to about 52.7 kN; the reference-speed value 26.2 kN is the thermal design point. Mass and section check: 5250 g inside the 100×170×68 mm outline leaves a 35.0 mm radial section, and the 390 kN static rating is 3.07× the dynamic rating — plan static safety and minimum preload against those figures. 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. At 100 mm bore and 68 mm overall height the unit drops into one recess where a mirrored single-direction pair would need two seats; both loose 170 mm housing washers must remain free to slide during thermal movement.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Service both cage sets together: replacing only the noisy side while leaving the worn 390 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 68 mm total height is not twice a single-direction bearing height, so reuse of old cover dimensions is a trap.
• 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 52224 with two single-direction 51-series bearings without re-checking the arrangement: envelope heights, seat details and catalogue ratings differ, even at the same 100×170 mm bore and OD.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for 52224 as the double flat pressed steel execution; other order numbers of the 52224 size are different products and may carry different ratings or seating geometry — always quote the full designation when purchasing.