52209 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 52209 model number is decoded

52209 is SKF's 35 mm-bore double-direction thrust ball bearing in the 52200 series to the ISO 104 dimension plan, with a flat housing seating surface, measuring 35×73×37 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 35 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 35×73×37 mm (1.378×2.874×1.457 in), 19.0 mm radial section, C 39 kN, C0 86.5 kN, Pu 3.2 kN. reference speed 2,600 r/min (thermal) and limiting speed 3,600 r/min (mechanical), catalogue mass 600 g. Envelope economics: the 37 mm axial height over a 19.0 mm radial section yields 1.1 kN of dynamic capacity per height millimetre, and the bearing weighs 600 g for 39 kN C — about 15 g per rated kN. Light-load floor: Pu = 3.2 kN is the equivalent-load threshold below which the SKF adjusted-life equation credits very long life for 52209; the number is 8 % of the 39 kN dynamic rating. Rating split for documentation: dynamic 39 kN (L10 life), static 86.5 kN (safety factor s0), fatigue limit 3.2 kN (adjusted life) — three different uses of three different numbers for 52209, none interchangeable with another. Selection figures for 52209: the C0/C ratio is 2.22, Pu 3.2 kN is about 8 % of C, and the catalogue mass works out to roughly 17 g per millimetre of bore; the printed minimum-load factor is A 0.038. Mass and section check: 600 g inside the 35×73×37 mm outline leaves a 19.0 mm radial section, and the 86.5 kN static rating is 2.22× 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. Life accounting for 52209 is done separately per direction: if duty applies 39 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

• The double-direction 52209 is one central shaft washer with tracks on both faces, two housing washers and two ball-cage assemblies — a single unit locating the 35 mm shaft axially in both directions instead of a mirrored pair.
• Each direction independently needs the minimum axial load (factor A 0.038): the side that is momentarily unloaded during slow reversal skids first, so arrange preload or symmetry rather than assuming the loaded side drives the idle side.
• Do not replace a 52209 with two single-direction 51-series bearings without re-checking the arrangement: envelope heights, seat details and catalogue ratings differ, even at the same 35×73 mm bore and OD.
• The central shaft washer takes the interference fit on the 35 mm shaft while both outer housing washers run loose in their registers; both loose washers need positive axial retention on vertical shafts.
• The 39/86.5 kN figures belong to 52209 specifically (the double flat pressed steel execution of 52209); suffixed, sphered and counterpart-series order numbers are separate articles, so write the complete designation on the order and the maintenance record.