609 bearing: complete specifications & equivalents
The 609 is a ISO 15 radial bearing sized 9 x 24 x 7 mm (bore x OD x width). 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 | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 3.9 kN |
| Basic static load rating C0 | 1.66 kN |
| Fatigue load limit Pu | 0.071 kN |
| Reference speed (thermal) | 70000 rpm |
| Limiting speed (mechanical) | 43000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 14 g |
| Manufacturer designation | 609 |
| 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 |
|---|---|---|---|
| 609-2RS | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 9×24×7 mm envelope and equivalent catalogue ratings; 609-2RSH is the two contact elastomer seals execution of this size — boundary dimensions interchangeable, only the seal/shield/cage execution differs. |
| 609-RSR | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 9×24×7 mm envelope and equivalent catalogue ratings; 609-2RSL is the low-friction non-contact seals execution of this size — boundary dimensions interchangeable, only the seal/shield/cage execution differs. |
| 609-ZZ | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 9×24×7 mm envelope and equivalent catalogue ratings; 609-2Z is the two non-contact shields execution of this size — boundary dimensions interchangeable, only the seal/shield/cage execution differs. |
| W609-2RS | 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 (3.9/1.66 kN vs 2.03/0.815 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
| W609-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 (3.9/1.66 kN vs 2.03/0.815 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
| W609 | 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 (3.9/1.66 kN vs 2.03/0.815 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
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 609 model number is decoded
In the 6000-series, the final digit is the bore in millimetres: 609 fits a 9 mm shaft (direct-number miniature spelling). The envelope is 9×24×7 mm (0.354×0.945×0.276 in) with a 7.5 mm radial section height, C 3.9 kN, C0 1.66 kN and Pu 0.071 kN. The open 609 carries no shields or seals and relies on application lubrication and external sealing. Limiting speed 43000 r/min, catalogue mass 14 g.
Typical equipment & failure modes
Common applications
- domestic appliances
- instrument and encoder drives
- model-making and hobby mechanics
- small pumps
Known failure patterns
- contamination wear when the open arrangement is used without external seals
- lubricant starvation where no regreasing interval is maintained
- rolling-contact fatigue spalling once the catalogue L10 life is exceeded
- brinelling from static overload or hammer blows during mounting
Selection pitfalls — read before you substitute
- 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 0.071 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
- Open 609 needs external sealing at the arrangement level; in dusty housings its life depends entirely on those external seals and the regreasing schedule.
- Plan a relubrication interval for 609; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- Do not preload 609 to silence it: a deep-groove ball bearing is not angular-contact, and axial preload only raises temperature and shortens grease life.
- Clearance suffixes follow the seal code in the designation stack (e.g. 609-2Z/C3 in SKF spelling); no suffix means normal CN internal clearance.
Frequently asked questions
What are the dimensions of 609?
The SKF 609 measures 9 mm bore × 24 mm OD × 7 mm width (0.354 × 0.945 × 0.276 in), mass about 14 g. It is open, with no shields or seals.
How do I read the 609 designation?
Small miniature bearings print the bore as the final digit, so 609 is a 9 mm bearing; the series digits in front give the section (OD/width family).
How heavy is 609?
Catalogue mass is 14 g for 609; seal and cage executions of the same envelope differ by a few grams.
What load can 609 take?
Catalogue values for 609: dynamic C 3.9 kN, static C0 1.66 kN, fatigue limit Pu 0.071 kN. Use C in life calculation and C0 for static checks at 9 mm bore.
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.