52211 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 52211 model number is decoded

Listed in SKF 17000 chapter 5, 52211 is an ISO 104 double-direction thrust ball bearing, 45 mm bore and 90 mm OD on a flat housing seat, standing 45 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 52211 is 45 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 45×90×45 mm (1.772×3.543×1.772 in), 22.5 mm radial section, C 58.5 kN, C0 134 kN, Pu 4.9 kN. reference speed 2,200 r/min (thermal) and limiting speed 3,000 r/min (mechanical), catalogue mass 1100 g. Sizing arithmetic on the 45 mm bore: 58.5 kN C over the 22.5 mm radial section gives 2.6 kN per section millimetre, and the 45 mm stack height is 2.00× that section — proportions typical of a 52200 thrust section. Imperial cross-check for procurement drawings: 1.772 in bore, 3.543 in OD, 1.772 in height, and the 1100 g catalogue mass converts to 1.100 kg (38.8 oz). Light-load floor: Pu = 4.9 kN is the equivalent-load threshold below which the SKF adjusted-life equation credits very long life for 52211; the number is 8 % of the 58.5 kN dynamic rating. Minimum-load arithmetic: with dm ≈ 67.5 mm and factor A 0.11, Fam ≈ A·(n·dm/1000)² at the 2,200 r/min reference speed is about 2.4 kN for 52211; below that preload the balls skid and smear the tracks. Speed-ratio note for this exact unit: the reference speed is 2,200 r/min against a 3,000 r/min limiting speed, a reference-to-limit ratio of 0.73. 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 52211 is done separately per direction: if duty applies 58.5 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

• 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 52211 with two single-direction 51-series bearings without re-checking the arrangement: envelope heights, seat details and catalogue ratings differ, even at the same 45×90 mm bore and OD.
• Observe the stack order at fitting: shaft washer central, the two housing washers facing outwards with a cage set on each side; the 45 mm total height is not twice a single-direction bearing height, so reuse of old cover dimensions is a trap.
• The double-direction 52211 is one central shaft washer with tracks on both faces, two housing washers and two ball-cage assemblies — a single unit locating the 45 mm shaft axially in both directions instead of a mirrored pair.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for 52211 as the double flat pressed steel execution; other order numbers of the 52211 size are different products and may carry different ratings or seating geometry — always quote the full designation when purchasing.