6.35 mm Steel Ball (Bearing Ball), ISO 3290-1
The 6.35 mm steel ball (ISO 3290-1): nominal ball diameter 6.35 mm, corresponding inch size 0.25 mm. Available as simplified STEP files.

How these parts are made, and what the levels mean: read the method
- Also searched as: 6.35 mm steel ball
- Model id:
iso3290-d6-35
- Standard: ISO 3290-1:2014 · size 6.35 mm
Files
| Part key | Simplified |
|---|
iso3290-d6-35 | STEP |
Dimensions

| Symbol | Name | min | nom | max | Modeled | Rule | Level |
|---|
| Dw | Nominal ball diameter | | 6.35 | | 6.35 | nominal | L1 |
| Dw_inch | Corresponding inch size | | 0.25 | | 0.25 | nominal | L1 |
Drawing

As a PDF: CC-ISO3290-SZ-6.35.pdf.
The 6.35 mm steel ball beside the 6 mm and the 6.5 mm
The 6.35 mm is number 20, counting from the smallest, of the 28 ISO 3290-1 steel balls published here, from 2 mm to 8 mm.
- Nominal ball diameter (Dw): 6.35 mm on the 6.35 mm steel ball, against 6 mm on the 6 mm and 6.5 mm on the 6.5 mm.
Other sizes
Documents
Sources
ceramicspeed-balls-datasheet, iso3290-1-2014-sample, mba-balls-catalogue. Full citations: the method page and this size's datasheet.
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