# Square keys, inch (ANSI B17.1): 3/32 to 1/2 in

> What key goes on a 1 inch shaft?

- Category: Hardware › Mechanisms & linkages
- Kind: Standard part
- Basis: ANSI B17.1 keys and keyseats: square key size by shaft diameter; keyseat depth k/2
- Page: https://xemstudio.com/objects/square-keys-inch/ · JSON: https://xemstudio.com/api/geometry?object=square-keys-inch · Plain text: https://xemstudio.com/objects/square-keys-inch/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- Square ends (bar stock keys).

## Sizes

| shaft_in | key_in | lengths_in |
|---|---|---|
| 0.3125–0.4375 | 0.0938 | 0.75, 1, 1.5, 2, 3 |
| 0.4375–0.5625 | 0.125 | 0.75, 1, 1.5, 2, 3 |
| 0.5625–0.875 | 0.1875 | 0.75, 1, 1.5, 2, 3 |
| 0.875–1.25 | 0.25 | 0.75, 1, 1.5, 2, 3 |
| 1.25–1.375 | 0.3125 | 0.75, 1, 1.5, 2, 3 |
| 1.375–1.75 | 0.375 | 0.75, 1, 1.5, 2, 3 |
| 1.75–2.25 | 0.5 | 0.75, 1, 1.5, 2, 3 |

## Where the files are

- ASME: [ANSI B17.1 Keys and keyseats](https://www.asme.org/codes-standards/find-codes-standards/b17-1-keys-keyseats) — standard — ASME; dimensions are facts (verify at link)

## Free STEP/STL (35 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/square-keys-inch/index.json

- square-key-6-64in-x0.75in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-6-64in-x0.75in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-6-64in-x0.75in.stl) — 0.09375 in square key × 0.75 in, for shafts over 0.3125 up to 0.4375 in (keyway depth k/2 in shaft and hub)
- square-key-6-64in-x1in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-6-64in-x1in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-6-64in-x1in.stl) — 0.09375 in square key × 1 in, for shafts over 0.3125 up to 0.4375 in (keyway depth k/2 in shaft and hub)
- square-key-6-64in-x1.5in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-6-64in-x1.5in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-6-64in-x1.5in.stl) — 0.09375 in square key × 1.5 in, for shafts over 0.3125 up to 0.4375 in (keyway depth k/2 in shaft and hub)
- square-key-6-64in-x2in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-6-64in-x2in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-6-64in-x2in.stl) — 0.09375 in square key × 2 in, for shafts over 0.3125 up to 0.4375 in (keyway depth k/2 in shaft and hub)
- square-key-6-64in-x3in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-6-64in-x3in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-6-64in-x3in.stl) — 0.09375 in square key × 3 in, for shafts over 0.3125 up to 0.4375 in (keyway depth k/2 in shaft and hub)
- square-key-8-64in-x0.75in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-8-64in-x0.75in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-8-64in-x0.75in.stl) — 0.125 in square key × 0.75 in, for shafts over 0.4375 up to 0.5625 in (keyway depth k/2 in shaft and hub)
- square-key-8-64in-x1in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-8-64in-x1in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-8-64in-x1in.stl) — 0.125 in square key × 1 in, for shafts over 0.4375 up to 0.5625 in (keyway depth k/2 in shaft and hub)
- square-key-8-64in-x1.5in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-8-64in-x1.5in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-8-64in-x1.5in.stl) — 0.125 in square key × 1.5 in, for shafts over 0.4375 up to 0.5625 in (keyway depth k/2 in shaft and hub)
- square-key-8-64in-x2in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-8-64in-x2in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-8-64in-x2in.stl) — 0.125 in square key × 2 in, for shafts over 0.4375 up to 0.5625 in (keyway depth k/2 in shaft and hub)
- square-key-8-64in-x3in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-8-64in-x3in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-8-64in-x3in.stl) — 0.125 in square key × 3 in, for shafts over 0.4375 up to 0.5625 in (keyway depth k/2 in shaft and hub)
- square-key-12-64in-x0.75in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-12-64in-x0.75in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-12-64in-x0.75in.stl) — 0.1875 in square key × 0.75 in, for shafts over 0.5625 up to 0.875 in (keyway depth k/2 in shaft and hub)
- square-key-12-64in-x1in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-12-64in-x1in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-12-64in-x1in.stl) — 0.1875 in square key × 1 in, for shafts over 0.5625 up to 0.875 in (keyway depth k/2 in shaft and hub)
- square-key-12-64in-x1.5in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-12-64in-x1.5in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-12-64in-x1.5in.stl) — 0.1875 in square key × 1.5 in, for shafts over 0.5625 up to 0.875 in (keyway depth k/2 in shaft and hub)
- square-key-12-64in-x2in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-12-64in-x2in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-12-64in-x2in.stl) — 0.1875 in square key × 2 in, for shafts over 0.5625 up to 0.875 in (keyway depth k/2 in shaft and hub)
- square-key-12-64in-x3in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-12-64in-x3in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-12-64in-x3in.stl) — 0.1875 in square key × 3 in, for shafts over 0.5625 up to 0.875 in (keyway depth k/2 in shaft and hub)
- square-key-16-64in-x0.75in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-16-64in-x0.75in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-16-64in-x0.75in.stl) — 0.25 in square key × 0.75 in, for shafts over 0.875 up to 1.25 in (keyway depth k/2 in shaft and hub)
- square-key-16-64in-x1in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-16-64in-x1in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-16-64in-x1in.stl) — 0.25 in square key × 1 in, for shafts over 0.875 up to 1.25 in (keyway depth k/2 in shaft and hub)
- square-key-16-64in-x1.5in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-16-64in-x1.5in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-16-64in-x1.5in.stl) — 0.25 in square key × 1.5 in, for shafts over 0.875 up to 1.25 in (keyway depth k/2 in shaft and hub)
- square-key-16-64in-x2in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-16-64in-x2in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-16-64in-x2in.stl) — 0.25 in square key × 2 in, for shafts over 0.875 up to 1.25 in (keyway depth k/2 in shaft and hub)
- square-key-16-64in-x3in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-16-64in-x3in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-16-64in-x3in.stl) — 0.25 in square key × 3 in, for shafts over 0.875 up to 1.25 in (keyway depth k/2 in shaft and hub)
- square-key-20-64in-x0.75in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-20-64in-x0.75in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-20-64in-x0.75in.stl) — 0.3125 in square key × 0.75 in, for shafts over 1.25 up to 1.375 in (keyway depth k/2 in shaft and hub)
- square-key-20-64in-x1in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-20-64in-x1in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-20-64in-x1in.stl) — 0.3125 in square key × 1 in, for shafts over 1.25 up to 1.375 in (keyway depth k/2 in shaft and hub)
- square-key-20-64in-x1.5in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-20-64in-x1.5in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-20-64in-x1.5in.stl) — 0.3125 in square key × 1.5 in, for shafts over 1.25 up to 1.375 in (keyway depth k/2 in shaft and hub)
- square-key-20-64in-x2in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-20-64in-x2in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-20-64in-x2in.stl) — 0.3125 in square key × 2 in, for shafts over 1.25 up to 1.375 in (keyway depth k/2 in shaft and hub)
- square-key-20-64in-x3in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-20-64in-x3in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-20-64in-x3in.stl) — 0.3125 in square key × 3 in, for shafts over 1.25 up to 1.375 in (keyway depth k/2 in shaft and hub)
- square-key-24-64in-x0.75in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-24-64in-x0.75in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-24-64in-x0.75in.stl) — 0.375 in square key × 0.75 in, for shafts over 1.375 up to 1.75 in (keyway depth k/2 in shaft and hub)
- square-key-24-64in-x1in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-24-64in-x1in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-24-64in-x1in.stl) — 0.375 in square key × 1 in, for shafts over 1.375 up to 1.75 in (keyway depth k/2 in shaft and hub)
- square-key-24-64in-x1.5in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-24-64in-x1.5in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-24-64in-x1.5in.stl) — 0.375 in square key × 1.5 in, for shafts over 1.375 up to 1.75 in (keyway depth k/2 in shaft and hub)
- square-key-24-64in-x2in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-24-64in-x2in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-24-64in-x2in.stl) — 0.375 in square key × 2 in, for shafts over 1.375 up to 1.75 in (keyway depth k/2 in shaft and hub)
- square-key-24-64in-x3in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-24-64in-x3in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-24-64in-x3in.stl) — 0.375 in square key × 3 in, for shafts over 1.375 up to 1.75 in (keyway depth k/2 in shaft and hub)
- square-key-32-64in-x0.75in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-32-64in-x0.75in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-32-64in-x0.75in.stl) — 0.5 in square key × 0.75 in, for shafts over 1.75 up to 2.25 in (keyway depth k/2 in shaft and hub)
- square-key-32-64in-x1in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-32-64in-x1in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-32-64in-x1in.stl) — 0.5 in square key × 1 in, for shafts over 1.75 up to 2.25 in (keyway depth k/2 in shaft and hub)
- square-key-32-64in-x1.5in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-32-64in-x1.5in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-32-64in-x1.5in.stl) — 0.5 in square key × 1.5 in, for shafts over 1.75 up to 2.25 in (keyway depth k/2 in shaft and hub)
- square-key-32-64in-x2in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-32-64in-x2in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-32-64in-x2in.stl) — 0.5 in square key × 2 in, for shafts over 1.75 up to 2.25 in (keyway depth k/2 in shaft and hub)
- square-key-32-64in-x3in: [STEP](https://xemstudio.com/files/hardware/square-keys-inch/square-key-32-64in-x3in.step) · [STL](https://xemstudio.com/files/hardware/square-keys-inch/square-key-32-64in-x3in.stl) — 0.5 in square key × 3 in, for shafts over 1.75 up to 2.25 in (keyway depth k/2 in shaft and hub)

## Questions

**Key for a 1 in shaft?**

1/4 in square.

## Fits with

- [Parallel keys DIN 6885 form A: 2 × 2 to 18 × 11, with keyway depths](https://xemstudio.com/objects/parallel-keys-din-6885/)