W6209-ZZ bearing: complete specifications & equivalents
The W6209-ZZ is a ISO 15 radial bearing sized 45 x 85 x 19 mm (bore x OD x width) with ZZ 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 | 19 mm |
| Material | SS440C |
| Seal / shield | ZZ |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 28.1 kN |
| Basic static load rating C0 | 20.4 kN |
| Fatigue load limit Pu | 0.865 kN |
| Reference speed (thermal) | 18000 rpm |
| Limiting speed (mechanical) | 9000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 394 g |
| Manufacturer designation | W 6209-2Z |
| 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 & 6200-series range
| Bore d | 1.772 in |
|---|---|
| Outer diameter D | 3.346 in |
| Width B | 0.748 in |
| ISO bore code | 09 |
| Radial section height (D−d)/2 | 20 mm |
| Smallest bore in 6200-series | 3 mm |
| Largest outer diameter in 6200-series | 540 mm |
| Width range across 6200-series | 2.5–85 mm |
| Bore position in 6200-series (smallest first) | 18 of 45 |
| Bore above smallest 6200-series size | 42 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6209-RSR | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | NSK NSK 6209VV shares the 45×85×19 mm envelope but carries different catalogue ratings (28.1/20.4 kN vs 34.5/20.4 kN) — the stainless execution is not a load-rating equivalent. |
| W6209-2RS | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 45×85×19 mm envelope and equivalent catalogue ratings; W 6209-2RS1 is the two contact elastomer seals execution of this size — boundary dimensions interchangeable, only the seal/shield/cage execution differs. |
| 209 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 45×85×19 mm envelope, but the stainless and chrome-steel executions carry different catalogue ratings (28.1/20.4 kN vs 35.2/30 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
| 209-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 45×85×19 mm envelope, but the stainless and chrome-steel executions carry different catalogue ratings (28.1/20.4 kN vs 35.2/30 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
| 6209 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF SKF 6209 shares the 45×85×19 mm envelope but carries different catalogue ratings (28.1/20.4 kN vs 35.1/21.6 kN) — the stainless execution is not a load-rating equivalent. |
| 6209-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF SKF 6209-2Z shares the 45×85×19 mm envelope but carries different catalogue ratings (28.1/20.4 kN vs 35.1/21.6 kN) — the stainless execution is not a load-rating equivalent. |
| 6209-2RS | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF SKF 6209-2RSH shares the 45×85×19 mm envelope but carries different catalogue ratings (28.1/20.4 kN vs 35.1/21.6 kN) — the stainless execution is not a load-rating equivalent. |
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 W6209-ZZ model number is decoded
The W prefix denotes SKF stainless steel deep-groove bearings (X108CrMo17 / AISI 440C class rings). In the 6200-series, the last two digits encode the bore: 6209 carries code 09 = 45 mm (code × 5). Envelope 45×85×19 mm (1.772×3.346×0.748 in), C 28.1 kN, C0 20.4 kN, Pu 0.865 kN; limiting speed 9000 r/min and mass 394 g. SKF spells the double shield W 6209-2Z (suffix 2Z); the shields are non-contact, retain grease and block coarse debris but are not liquid-tight. 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
- chemical and marine atmospheres
- medical and laboratory devices
- small pumps handling corrosive media
- bicycle and outdoor equipment
Known failure patterns
- surface staining and pitting when even the stainless steel is left unlubricated in salty or acidic duty
- seal and grease failure before the rings corrode in sustained washdown service
- fine-particle abrasion when non-contact shields let dust through in a dirty environment
- grease aging inside the shielded cavity with no relubrication path
Selection pitfalls — read before you substitute
- Corrosion resistance depends on clean, undamaged surfaces: never weld near W6209-ZZ 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 W6209-ZZ 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 — W6209-ZZ is not marine-grade stainless.
- The stainless steel is martensitic and MAGNETIC; do not reject W6209-ZZ over magnetism — only austenitic grades are non-magnetic, and those are too soft for bearing raceways.
- Do not preload W6209-ZZ to silence it: a deep-groove ball bearing is not angular-contact, and axial preload only raises temperature and shortens grease life.
- Catalogue ratings for W6209-ZZ (C 28.1 kN, C0 20.4 kN) are SKF figures from PUB BU/P1 17000; geometry revisions can change ratings without changing the designation, so keep the catalogue edition with the specification.
Frequently asked questions
What are the dimensions of the stainless W6209-ZZ?
SKF W 6209-2Z measures 45×85×19 mm (1.772×3.346×0.748 in), about 394 g, C 28.1 kN.
What does the W in W 6209-2Z 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 W6209-ZZ 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.