619-9 bearing: complete specifications & equivalents
The 619-9 is a ISO 15 radial bearing sized 9 x 20 x 6 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 | 20 mm |
| Width B | 6 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 2.34 kN |
| Basic static load rating C0 | 0.98 kN |
| Fatigue load limit Pu | 0.043 kN |
| Reference speed (thermal) | 80000 rpm |
| Limiting speed (mechanical) | 50000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 7.6 g |
| Manufacturer designation | 619/9 |
| 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 & 61900-series range
| Bore d | 0.354 in |
|---|---|
| Outer diameter D | 0.787 in |
| Width B | 0.236 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 5.5 mm |
| Smallest bore in 61900-series | 3 mm |
| Largest outer diameter in 61900-series | 1120 mm |
| Width range across 61900-series | 3–118 mm |
| Bore position in 61900-series (smallest first) | 7 of 63 |
| Bore above smallest 61900-series size | 6 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 619-9-ZZ | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 9×20×6 mm envelope and equivalent catalogue ratings; 619/9-2Z is the two non-contact shields execution of this size — boundary dimensions interchangeable, only the seal/shield/cage execution differs. |
| W619-9-ZZ | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 9×20×6 mm envelope, but the stainless and chrome-steel executions carry different catalogue ratings (2.34/0.98 kN vs 1.95/0.93 kN) — envelope match, not a load-rating equivalent; choose by corrosion versus load duty. |
| W619-9 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 9×20×6 mm envelope, but the stainless and chrome-steel executions carry different catalogue ratings (2.34/0.98 kN vs 1.95/0.93 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 619-9 model number is decoded
In the miniature 61900-series, the bore is written directly after the slash as 9 mm (bores below 10 mm use the slash spelling). The envelope is 9×20×6 mm (0.354×0.787×0.236 in) with a 5.5 mm radial section height, C 2.34 kN, C0 0.98 kN and Pu 0.043 kN. The open 619/9 carries no shields or seals and relies on application lubrication and external sealing. Limiting speed 50000 r/min, catalogue mass 7.6 g. A thin section saves space but leaves little margin for misalignment or shaft deflection.
Typical equipment & failure modes
Common applications
- textile and packaging machinery
- slew and indexing drives
- industrial electric motors
- gearboxes and speed reducers
Known failure patterns
- contamination wear when the open arrangement is used without external seals
- lubricant starvation where no regreasing interval is maintained
- fretting corrosion on a creeping shaft or housing seat
- cage damage from running beyond the limiting speed
Selection pitfalls — read before you substitute
- Fillet radii must clear the 619-9 chamfer so the 6 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
- The fatigue load limit is 0.043 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
- Open 619-9 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 619-9; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- The fatigue load limit is 0.043 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
- Fillet radii must clear the 619-9 chamfer so the 6 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
Frequently asked questions
What are the dimensions of 619-9?
The SKF 619/9 measures 9 mm bore × 20 mm OD × 6 mm width (0.354 × 0.787 × 0.236 in), mass about 7.6 g. It is open, with no shields or seals.
Why is there a slash in the designation 619/9?
The slash writes a bore that falls outside the two-digit code table: 619/9 means 9 mm bore. The site slug 619-9 replaces the slash with a hyphen.
What is the speed rating of 619-9?
SKF lists a 80000 r/min thermal reference speed and a 50000 r/min mechanical limiting speed for 619/9; real limits also depend on lubrication and fits.
What is the difference between 619-9 and a same-bore 62-series bearing?
Section height differs: 619-9 has a 5.5 mm radial section and C 2.34 kN; always match d, D and B — same bore alone never makes two bearings interchangeable.
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.