W609-2RS bearing: complete specifications & equivalents
The W609-2RS is a ISO 15 radial bearing sized 9 x 24 x 7 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 | 9 mm |
| Outer diameter D | 24 mm |
| Width B | 7 mm |
| Material | SS440C |
| Seal / shield | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 2.03 kN |
| Basic static load rating C0 | 0.815 kN |
| Fatigue load limit Pu | 0.036 kN |
| Limiting speed (mechanical) | 20000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 14 g |
| Manufacturer designation | W 609-2RS1 |
| 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 & 6000-series range
| Bore d | 0.354 in |
|---|---|
| Outer diameter D | 0.945 in |
| Width B | 0.276 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 7.5 mm |
| Smallest bore in 6000-series | 4 mm |
| Largest outer diameter in 6000-series | 1150 mm |
| Width range across 6000-series | 4–155 mm |
| Bore position in 6000-series (smallest first) | 6 of 61 |
| Bore above smallest 6000-series size | 5 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 609 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 9×24×7 mm envelope, but the stainless and chrome-steel executions carry different catalogue ratings (2.03/0.815 kN vs 3.9/1.66 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
| 609-2RS | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 9×24×7 mm envelope, but the stainless and chrome-steel executions carry different catalogue ratings (2.03/0.815 kN vs 3.9/1.66 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
| 609-RSR | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 9×24×7 mm envelope, but the stainless and chrome-steel executions carry different catalogue ratings (2.03/0.815 kN vs 3.9/1.66 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
| 609-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 9×24×7 mm envelope, but the stainless and chrome-steel executions carry different catalogue ratings (2.03/0.815 kN vs 3.9/1.66 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
| W609-ZZ | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 9×24×7 mm envelope and equivalent catalogue ratings; W 609-2Z is the two non-contact shields execution of this size — boundary dimensions interchangeable, only the seal/shield/cage execution differs. |
| W609 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 9×24×7 mm envelope and equivalent catalogue ratings; W 609 is the open arrangement execution of this size — boundary dimensions interchangeable, only the seal/shield/cage 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 W609-2RS model number is decoded
The W prefix denotes SKF stainless steel deep-groove bearings (X108CrMo17 / AISI 440C class rings). In the 6000-series, the final digit is the bore in millimetres: 609 fits a 9 mm shaft (direct-number miniature spelling). Envelope 9×24×7 mm (0.354×0.945×0.276 in), C 2.03 kN, C0 0.815 kN, Pu 0.036 kN; limiting speed 20000 r/min and mass 14 g. SKF catalogues the sealed execution as W 609-2RS1: two contact elastomer lips (2RS1/2RSH spelling) over a lifetime grease fill; the lips add drag, and no reference (thermal) speed is published. Stainless is chosen for corrosion and washdown duty, not for extra load — the same-envelope chrome-steel bearing rates higher.
Typical equipment & failure modes
Common applications
- food and beverage conveyors
- pharmaceutical and packaging machines
- washdown-duty equipment
- chemical and marine atmospheres
Known failure patterns
- seal and grease failure before the rings corrode in sustained washdown service
- surface staining and pitting when even the stainless steel is left unlubricated in salty or acidic duty
- contact-seal lip hardening and pre-grease loss after long high-temperature service
- grease-life expiry inside the sealed-for-life cavity, which has no relubrication path
Selection pitfalls — read before you substitute
- Food, pharmaceutical and washdown positions need food-grade grease (e.g. NSF H1 registered) inside W609-2RS; standard fill is industrial grease unless specified otherwise.
- Corrosion resistance depends on clean, undamaged surfaces: never weld near W609-2RS or scratch the raceways during mounting, since the damaged spot starts corrosion.
- Temperatures above roughly 300 °C temper the stainless races; even standard greases fail far earlier — keep W609-2RS inside the quoted grease temperature range.
- W-prefix stainless rings (X108CrMo17 / AISI 440C class) resist moisture and weak chemicals but will still rust in chloride-rich or salt-spray duty without protection — W609-2RS is not marine-grade stainless.
- Assign interference to the rotating ring: on a conventional shaft-mounted 9 mm position the inner ring rotates, so use a k5/m6 shaft seat with an H7 housing — reverse the logic if the outer ring rotates.
- The fatigue load limit is 0.036 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
Frequently asked questions
What are the dimensions of the stainless W609-2RS?
SKF W 609-2RS1 measures 9×24×7 mm (0.354×0.945×0.276 in), about 14 g, C 2.03 kN.
What does the W in W 609-2RS1 mean?
W is the SKF prefix for stainless steel deep-groove bearings (rings in X108CrMo17 / AISI 440C class); the rest of the designation follows the normal series and bore rules.
Is the stainless bearing magnetic?
Yes. Bearing stainless steels are martensitic (hardened) and magnetic; non-magnetic austenitic grades cannot be hardened enough for raceways and balls.
Where is W609-2RS typically used?
Food and packaging machines, pharmaceutical equipment, washdown conveyors, chemical and marine-atmosphere drives and appliances exposed to moisture.
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.