3209-A-2RS1 bearing: complete specifications & equivalents
The 3209-A-2RS1 is a ISO 15 radial bearing sized 45 x 85 x 30.2 mm (bore x OD x width) with 2RS sealing. Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 45 mm |
| Outer diameter D | 85 mm |
| Width B | 30.2 mm |
| Material | GCr15 |
| Seal / shield | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 51 kN |
| Basic static load rating C0 | 39 kN |
| Fatigue load limit Pu | 1.63 kN |
| Limiting speed (mechanical) | 5300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 630 g |
| Manufacturer designation | 3209 A-2RS1 |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-27 |
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.
Dimensions in inches & 3200-series range
| Bore d | 1.772 in |
|---|---|
| Outer diameter D | 3.346 in |
| Width B | 1.189 in |
| ISO bore code | 09 |
| Radial section height (D−d)/2 | 20 mm |
| Smallest bore in 3200-series | 10 mm |
| Largest outer diameter in 3200-series | 200 mm |
| Width range across 3200-series | 14–69.8 mm |
| Bore position in 3200-series (smallest first) | 10 of 22 |
| Bore above smallest 3200-series size | 35 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 3209-A | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 45×85×30.2 mm envelope with catalogue ratings within 10 %; 3209 A is the stamped steel cage, open arrangement execution of this size — boundary dimensions interchangeable, execution differs. |
| 3209-ATN9 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 45×85×30.2 mm envelope with catalogue ratings within 10 %; 3209 ATN9 is the glass-fibre PA66 cage, open arrangement execution of this size — boundary dimensions interchangeable, execution differs. |
| 3209-A-2Z | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 45×85×30.2 mm envelope with catalogue ratings within 10 %; 3209 A-2Z is the stamped steel cage, shields (-2Z) execution of this size — boundary dimensions interchangeable, execution differs. |
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 3209-A-2RS1 model number is decoded
3209 A-2RS1 is the capped double-row angular-contact ball bearing for a 45 mm shaft, 45×85×30.2 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 45×85×30.2 mm (1.772×3.346×1.189 in), 20.0 mm radial section height, C 51 kN, C0 39 kN, Pu 1.63 kN.SKF publishes only the 5,300 r/min limiting speed for this execution, catalogue mass 630 g. Speed planning distinguishes the two published ceilings mechanically: the cage and balls tolerate 5,300 r/min and no separate thermal reference is published; at dm ≈ 65.0 mm the corresponding dn is approximately 345k mm·r/min. At the printed limiting speed of 5,300 r/min the mean pitch diameter dm ≈ 65.0 mm implies a dn value around 345k mm·r/min; only the limiting speed is published for this execution. Speed-ratio note for this exact unit: no thermal reference speed is listed (seal/grease life governs), so the 5,300 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
Common applications
- material-handling equipment
- lifetime-lubricated electric motor and gearbox positions
- agricultural machinery drives
Known failure patterns
- shield rubbing after misalignment or overheating of a 2Z execution
- grease loss when the sealed-for-life cavity is overheated with no relubrication path
- seal-lip wear and grease loss after fine abrasive dust reaches the lip contact
- snap-ring groove or two-piece-ring damage when the D execution is pressed home through the wrong ring
- mounting score marks when the bearing is cocked over a burr or keyway
- mounting score marks when the bearing is cocked over a burr or keyway
Selection pitfalls — read before you substitute
- Never wash 3209-A-2RS1 in solvent: the lifetime grease fill cannot be replaced once flushed out.
- Open 3209 and capped 3209-A-2RS1 share the 45×85×30.2 mm envelope and 51/39 kN ratings — the choice is maintenance access and contamination, not capacity.
- The capped speed ceiling is 5,300 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 3209 A-2RS1 as the double contactsealed execution; the other order numbers of the 3209 size are different products and may carry different ratings — always quote the full designation when purchasing.
Frequently asked questions
What are the dimensions and catalogue data of 3209-A-2RS1?
3209 A-2RS1 measures 45 mm bore × 85 mm OD × 30.2 mm width (1.772 × 3.346 × 1.189 in), mass about 630 g. SKF 17000 ratings: C 51 kN, C0 39 kN, Pu 1.63 kN, SKF publishes only the 5,300 r/min limiting speed for this execution.
What does the A-2RS1 suffix mean?
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.
What loads can 3209-A-2RS1 take?
The same bidirectional combined loads as the open double-row 3209: C 51 kN, C0 39 kN, Pu 1.63 kN. Capping changes sealing and speed, not the basic ratings.
Is 3209-A-2RS1 sealed for life?
Yes — the two -2RS1 contact NBR seals enclose a lifetime grease fill; there is no relubrication provision, and the seals cap the limiting speed at 5,300 r/min.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-27. Read our editorial & correction policy.