209 bearing: complete specifications & equivalents
The 209 is a ISO 15 radial bearing sized 45 x 85 x 19 mm (bore x OD x width). 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 | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 35.2 kN |
| Basic static load rating C0 | 30 kN |
| Fatigue load limit Pu | 1.27 kN |
| Reference speed (thermal) | 14000 rpm |
| Limiting speed (mechanical) | 8500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 440 g |
| Manufacturer designation | 209 |
| 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 & 200-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 200-series | 30 mm |
| Largest outer diameter in 200-series | 180 mm |
| Width range across 200-series | 16–34 mm |
| Bore position in 200-series (smallest first) | 4 of 15 |
| Bore above smallest 200-series size | 15 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 6209-RSR | NSK | partial Main dimensions match; tolerances, seals or internal clearance differ. | NSK bearing NSK 6209VV on the same 45×85×19 mm envelope, but catalogue C/C0 differ (35.2/30 kN vs 34.5/20.4 kN) — envelope interchange only after a load check. |
| W6209-2RS | 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 (35.2/30 kN vs 28.1/20.4 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
| W6209-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 (35.2/30 kN vs 28.1/20.4 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
| 209-ZZ | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 45×85×19 mm envelope and equivalent catalogue ratings; 209-2Z is the two non-contact shields execution of this size — boundary dimensions interchangeable, only the seal/shield/cage execution differs. |
| 6209 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | SKF SKF 6209 shares the 45×85×19 mm envelope but catalogue C/C0 differ (35.2/30 kN vs 35.1/21.6 kN) — envelope match, 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 catalogue C/C0 differ (35.2/30 kN vs 35.1/21.6 kN) — envelope match, 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 catalogue C/C0 differ (35.2/30 kN vs 35.1/21.6 kN) — envelope match, 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 209 model number is decoded
209 is a filling-slot (notched-ring) deep-groove bearing in the legacy 200-series: the last two digits encode the bore: 209 carries code 09 = 45 mm (code × 5). The rings carry loading slots that allow extra balls during assembly, which is what gives the 45×85×19 mm envelope its C 35.2 kN and C0 30 kN ratings (Pu 1.27 kN). The open 209 carries no shields or seals and relies on application lubrication and external sealing. Limiting speed 8500 r/min, mass 440 g. These bearings are built for high purely-radial loads at moderate speeds.
Typical equipment & failure modes
Common applications
- material-handling winches
- slow heavy gearboxes
- farm machinery and harvesters
- construction equipment drives
Known failure patterns
- spalling of the filling-slot edge when balls are hammered through the slot under heavy thrust loading
- dirt entering through the open slot area when external sealing is neglected
- cage damage from running beyond the limiting speed
- raceway smearing under marginal lubrication at start-up
Selection pitfalls — read before you substitute
- 209 uses the legacy SKF 200/300 numbering (light/heavy filling-slot series), not the modern 6200/6300 spelling; quote 209 exactly when ordering replacements.
- Filling-slot bearings take heavy purely-radial load at moderate speed but little thrust; the 35.2/30 kN ratings assume radial loading — use deep-groove 6xxx where axial load matters.
- Shields on 209 retain grease but do not seal against water; for wet farm duty add external lip seals rather than trusting the shield.
- Limiting speed is just 8500 r/min: filling-slot cages and the slot geometry run cooler below that — overspeed drives cage wear and smearing.
- Filling slots let more balls be packed into the 45×85 mm envelope, which is why 209 reaches C 35.2 kN — but the slots also mean the two rings separate when the balls align with them, so handle it as a loose-clearance design.
- Mount by heating the inner ring (max 120 °C) — driving 209 home through the outer ring or balls brinells the raceways.
Frequently asked questions
What are the dimensions of 209?
Filling-slot bearing 209 measures 45×85×19 mm (1.772×3.346×0.748 in), about 440 g.
What does the designation 209 mean?
It is the legacy 200/300 filling-slot numbering: series 200 and bore code 09 = 45 mm. Filling-slot bearings predate the 6xxx deep-groove spelling.
What is a filling-slot bearing?
The inner and outer rings each have a loading slot; when aligned, extra balls can be inserted, raising radial rating (C 35.2 kN for 209). The slots also make the rings separable.
Can 209 take axial load?
Very little: the filling slots interrupt the raceway shoulders, so thrust towards the open slot side can unload or jam the balls. Use a standard deep-groove 6xxx bearing for combined loads.
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.