# 608 ball bearing

> What are the dimensions of a 608 bearing?

- Category: Hardware › Motion
- Kind: Standard part
- Basis: ISO 15 standard
- Page: https://xemstudio.com/objects/608-bearing/ · JSON: https://xemstudio.com/api/geometry?object=608-bearing · Plain text: https://xemstudio.com/objects/608-bearing/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses

## Overall (mm)

| length | width | height |
|---|---|---|
| 7 | 22 | 22 |

## Notes

- Bore 8 mm, outer diameter 22 mm, width 7 mm. Shielded (ZZ) and sealed (2RS) are the same envelope.
- Press fit: Ø22.0 nominal; printed pockets usually at Ø22.2–22.3.

## Where the files are

- Wikipedia: [Ball bearing (ISO designations)](https://en.wikipedia.org/wiki/Ball_bearing) — web — CC BY-SA 4.0 (text)

## Free STEP/STL (2 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/608-bearing/index.json

- bearing-608: [STEP](https://xemstudio.com/files/hardware/608-bearing/bearing-608.step) · [STL](https://xemstudio.com/files/hardware/608-bearing/bearing-608.stl) — 608: 8 × 22 × 7 mm
- bearing-f608: [STEP](https://xemstudio.com/files/hardware/608-bearing/bearing-f608.step) · [STL](https://xemstudio.com/files/hardware/608-bearing/bearing-f608.stl) — F608 flanged: 8 × 22 × 7, flange Ø25 × 1.5

## Questions

**What are 608 bearing dimensions?**

8 mm bore, 22 mm OD, 7 mm wide. ZZ (shielded) and 2RS (sealed) share the envelope. Printed pocket 22.2–22.3 mm.

**What size is a skateboard bearing?**

608: 8 × 22 × 7 mm, the same part used in fidget spinners and 3D printer idlers.

## Fits with

- [NEMA 17 stepper motor](https://xemstudio.com/objects/nema-17-stepper/)
- [2020 aluminum extrusion](https://xemstudio.com/objects/2020-extrusion/)
- [Dowel pins, 2–6 mm (ISO 2338 / DIN 6325)](https://xemstudio.com/objects/dowel-pins-metric/)