609-ZZ bearing: complete specifications & equivalents
The 609-ZZ is a ISO 15 radial bearing sized 9 x 24 x 7 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 | 9 mm |
| Outer diameter D | 24 mm |
| Width B | 7 mm |
| Material | GCr15 |
| Seal / shield | ZZ |
| 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) | 34000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 15 g |
| Manufacturer designation | 609-2Z |
| 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 & 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 | full Dimensions and internal design equivalent — standard interchange. | Same 9×24×7 mm envelope and equivalent catalogue ratings; 609 is the open arrangement execution of this size — boundary dimensions interchangeable, only the seal/shield/cage execution differs. |
| 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. |
| 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-ZZ 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. SKF spells the double shield 609-2Z (suffix 2Z); the shields are non-contact, retain grease and block coarse debris but are not liquid-tight. Limiting speed 34000 r/min, catalogue mass 15 g.
Typical equipment & failure modes
Common applications
- small pumps
- office equipment
- fractional-horsepower motors
- small fans and blowers
Known failure patterns
- fine-particle abrasion when non-contact shields let dust through in a dirty environment
- grease aging inside the shielded cavity with no relubrication path
- false brinelling from vibration while the shaft stands idle
- fretting corrosion on a creeping shaft or housing seat
Selection pitfalls — read before you substitute
- Do not preload 609-ZZ to silence it: a deep-groove ball bearing is not angular-contact, and axial preload only raises temperature and shortens grease life.
- At 9 mm bore, C3 clearance is the safe choice when interference fits plus temperature rise consume the CN clearance; a hot tight bearing with no residual clearance fails fast.
- Shields on 609-ZZ are non-contact: chips and coarse dust stay out, but water passes straight through — specify the sealed 609-2RS for washdown duty.
- Do not pry the caps off 609-ZZ to repack it; shield/seal damage leaves a gap that throws grease and admits dirt.
- Catalogue ratings for 609-ZZ (C 3.9 kN, C0 1.66 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.
- Mount by heating the inner ring (max 120 °C) — driving 609-ZZ home through the outer ring or balls brinells the raceways.
Frequently asked questions
What are the dimensions of 609-ZZ?
The SKF 609-2Z measures 9 mm bore × 24 mm OD × 7 mm width (0.354 × 0.945 × 0.276 in), mass about 15 g. It has two non-contact sheet-metal shields.
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-ZZ?
Catalogue mass is 15 g for 609-2Z; seal and cage executions of the same envelope differ by a few grams.
What load can 609-ZZ take?
Catalogue values for 609-2Z: 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.