3205-A-2RS1 bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-27

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 3205-A-2RS1 model number is decoded

3205 A-2RS1 is the capped double-row angular-contact ball bearing for a 25 mm shaft, 25×52×20.6 mm, greased and sealed (or shielded) for life at the SKF works. A on this double-row bearing means no filling slots, so both ball rows retain their full complement. -2RS1 marks a contact NBR elastomer seal on each side, riding the inner ring: better fine-dust and moisture protection than a shield at the cost of seal drag and a lower speed ceiling. Envelope 25×52×20.6 mm (0.984×2.047×0.811 in), 13.5 mm radial section height, C 21.6 kN, C0 14.3 kN, Pu 0.6 kN.SKF publishes only the 8,500 r/min limiting speed for this execution, catalogue mass 180 g. At the printed limiting speed of 8,500 r/min the mean pitch diameter dm ≈ 38.5 mm implies a dn value around 327k mm·r/min; only the limiting speed is published for this execution. Speed planning distinguishes the two published ceilings mechanically: the cage and balls tolerate 8,500 r/min and no separate thermal reference is published; at dm ≈ 38.5 mm the corresponding dn is approximately 327k mm·r/min. Speed-ratio note for this exact unit: no thermal reference speed is listed (seal/grease life governs), so the 8,500 r/min limiting value is the single published ceiling. Contact-seal execution note: the two NBR -2RS1 lips ride the inner-ring lands, sealing the factory grease against moisture and fine dust; the lips add running torque and set the lower limiting speed printed for this size, and the sealed cavity is maintenance-free by design (no relubrication path). The A-2Z shielded order number is the low-drag alternative for cleaner positions.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Fit and fillet rules are unchanged from the open double-row 3205: k5 on a 25 mm rotating shaft, radii clearing the chamfer.
• The shields/seals do not make the bearing waterproof under immersion or pressure washing; select external sealing for wet or wash-down duty.
• The capped speed ceiling is 8,500 r/min — seal drag and grease life govern, which is why SKF publishes no thermal reference speed for A-2RS1.
• The contact NBR seals add drag and a lower speed ceiling: no relubrication is provided for, so mounting cleanliness decides much of the real grease life.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for 3205 A-2RS1 as the double contactsealed execution; the other order numbers of the 3205 size are different products and may carry different ratings — always quote the full designation when purchasing.