3303-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 3303-A-2RS1 model number is decoded

3303 A-2RS1 is the capped double-row angular-contact ball bearing for a 17 mm shaft, 17×47×22.2 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 17×47×22.2 mm (0.669×1.85×0.874 in), 15.0 mm radial section height, C 21.6 kN, C0 12.7 kN, Pu 0.54 kN.SKF publishes only the 11,000 r/min limiting speed for this execution, catalogue mass 180 g. Load balance: C0 12.7 kN against C 21.6 kN gives a 0.59 ratio, typical of a steep-angle axial-oriented design; Pu 0.54 kN enters the SKF adjusted-life equation rather than the basic rating life. Speed planning distinguishes the two published ceilings mechanically: the cage and balls tolerate 11,000 r/min and no separate thermal reference is published; at dm ≈ 32.0 mm the corresponding dn is approximately 352k mm·r/min. Bore-to-OD planning: OD 47 over bore 17 is a 2.76× step for this size, and the 22.2 mm width gives a bore/width ratio of 0.77; use these ratios when housing space around the 17 mm shaft is the first constraint. 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

• Open 3303 and capped 3303-A-2RS1 share the 17×47×22.2 mm envelope and 21.6/12.7 kN ratings — the choice is maintenance access and contamination, not capacity.
• Never wash 3303-A-2RS1 in solvent: the lifetime grease fill cannot be replaced once flushed out.
• Never wash 3303-A-2RS1 in solvent: the lifetime grease fill cannot be replaced once flushed out.
• 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 3303 A-2RS1 as the double contactsealed execution; the other order numbers of the 3303 size are different products and may carry different ratings — always quote the full designation when purchasing.