52205 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 52205 model number is decoded

The 52200 series order number 52205 is a SKF double-direction thrust ball bearing for a 20 mm seat, built to ISO 104, with a flat housing seating surface, 20×47×28 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 20 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 20×47×28 mm (0.787×1.85×1.102 in), 13.5 mm radial section, C 26.5 kN, C0 50 kN, Pu 1.86 kN. reference speed 3,800 r/min (thermal) and limiting speed 5,300 r/min (mechanical), catalogue mass 220 g. Speed planning separates the two ceilings mechanically: the pressed cage and balls tolerate 5,300 r/min while thermal balance under catalogue load sets the 3,800 r/min reference; at dm ≈ 33.5 mm the corresponding dn is approximately 178k mm·r/min. Light-load floor: Pu = 1.86 kN is the equivalent-load threshold below which the SKF adjusted-life equation credits very long life for 52205; the number is 7 % of the 26.5 kN dynamic rating. Load balance: C0 50 kN against C 26.5 kN gives a 1.89 ratio — thrust ball bearings are chosen on static rating and F_a/C0 far more often than on L10 life, while Pu 1.86 kN enters the adjusted-life check. Capacity density: 26.5 kN C from 0.220 kg of bearing steel gives about 120.5 kN per kilogram; static density is correspondingly 227.3 kN/kg at C0 50 kN. Pitch-diameter arithmetic: dm = (20+47)/2 = 33.5 mm; at the 5,300 r/min limiting speed that corresponds to roughly 178k mm·r/min, the figure used when comparing cage speed demand across the thrust-ball series. 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 52205 is done separately per direction: if duty applies 26.5 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

• Do not replace a 52205 with two single-direction 51-series bearings without re-checking the arrangement: envelope heights, seat details and catalogue ratings differ, even at the same 20×47 mm bore and OD.
• Torque the cover to leave the catalogue axial freedom, never solid: a clamped double-direction stack cannot float to its thermal position, and at 5,300 r/min even a small thermal thrust preload smears the hottest track.
• The double-direction 52205 is one central shaft washer with tracks on both faces, two housing washers and two ball-cage assemblies — a single unit locating the 20 mm shaft axially in both directions instead of a mirrored pair.
• The central shaft washer takes the interference fit on the 20 mm shaft while both outer housing washers run loose in their registers; both loose washers need positive axial retention on vertical shafts.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for 52205 as the double flat pressed steel execution; other order numbers of the 52205 size are different products and may carry different ratings or seating geometry — always quote the full designation when purchasing.