52217 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 52217 model number is decoded

The 52200 series order number 52217 is a SKF double-direction thrust ball bearing for a 70 mm seat, built to ISO 104, with a flat housing seating surface, 70×125×55 mm boundary dimensions. Inside the unit sit a single central shaft washer with a ground interference bore, two outward-facing loose housing washers and two independent ball-cage assemblies, so axial force is reacted in both directions from one housing recess. bore-coding caveat: on 52/54 double-direction bearings the last two digits are an order-number code, not ×5 millimetres — this size carries a 70 mm bore per the ISO 104 table, and guessing from the code gives the wrong shaft. the suffix-free listing carries the catalogue default: a pressed (stamped sheet-steel) ball-cage assembly, light and quiet, used across the small and medium sizes. Envelope 70×125×55 mm (2.756×4.921×2.165 in), 27.5 mm radial section, C 97.5 kN, C0 275 kN, Pu 9.8 kN. reference speed 1,600 r/min (thermal) and limiting speed 2,200 r/min (mechanical), catalogue mass 2400 g. Stack/annulus proportions: the 55 mm axial stack over the 8,423 mm² washer annulus gives 6.53 mm of height per annular square millimetre ×10⁻³, and at 2400 g the bearing holds about 114.6 kN of C0 per kilogram. Speed planning separates the two ceilings mechanically: the pressed cage and balls tolerate 2,200 r/min while thermal balance under catalogue load sets the 1,600 r/min reference; at dm ≈ 97.5 mm the corresponding dn is approximately 215k mm·r/min. Pitch-diameter arithmetic: dm = (70+125)/2 = 97.5 mm; at the 2,200 r/min limiting speed that corresponds to roughly 215k mm·r/min, the figure used when comparing cage speed demand across the thrust-ball series. Section proportions: the 27.5 mm radial section compares with 70 mm of bore (section/bore ≈ 0.39) and the 55 mm height is 2.00× that section — the proportions that identify the 52200 envelope at a glance. Speed band width for this size is 600 r/min between reference and limiting (1.38× ratio); lubrication, preload and heat removal decide where inside that band 52217 can actually run. 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 52217 is done separately per direction: if duty applies 97.5 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

• Torque the cover to leave the catalogue axial freedom, never solid: a clamped double-direction stack cannot float to its thermal position, and at 2,200 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 275 kN opposite track in place reproduces the failure within weeks — inspect both shaft-washer faces and both loose washers at removal.
• Do not replace a 52217 with two single-direction 51-series bearings without re-checking the arrangement: envelope heights, seat details and catalogue ratings differ, even at the same 70×125 mm bore and OD.
• 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.
• The 97.5/275 kN figures belong to 52217 specifically (the double flat pressed steel execution of 52217); suffixed, sphered and counterpart-series order numbers are separate articles, so write the complete designation on the order and the maintenance record.