# Radial shaft seal 12 × 22 × 7 (envelope)

> What size is a 12 × 22 × 7 shaft seal?

- Category: Hardware › Bearings & seals
- Kind: Hardware
- Basis: Envelope at the listed size: shaft 12, housing bore 22, width 7
- Page: https://xemstudio.com/objects/radial-shaft-seal-12x22x7/ · JSON: https://xemstudio.com/api/geometry?object=radial-shaft-seal-12x22x7 · Plain text: https://xemstudio.com/objects/radial-shaft-seal-12x22x7/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.** Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part.

## Notes

- Envelope only: the space the seal takes in its housing. Elastomer lip seals in this size are made for low pressure; a seal on a pressurised crankcase has to be one rated for that pressure.

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| OD | Ø22 × 7 | seal-cap housing | press | all |
| lip | Ø12 | Ø12 shaft | run | all |

## Sizes

| d_mm | D_mm | b_mm |
|---|---|---|
| 12 | 22 | 7 |

## Where the files are

- Tameson (product listing): [Rotary shaft seal 12 × 22 × 7 mm (DIN 3760 sizes)](https://tameson.com/products/s2avq-x20-nbr-design-a-rotary-shaft-seal-12x22x7mm-20-pieces) — web — vendor page; dimensions are facts (verify at link)

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/radial-shaft-seal-12x22x7/index.json

- shaft-seal-12x22x7: [STEP](https://xemstudio.com/files/hardware/radial-shaft-seal-12x22x7/shaft-seal-12x22x7.step) · [STL](https://xemstudio.com/files/hardware/radial-shaft-seal-12x22x7/shaft-seal-12x22x7.stl) — radial shaft seal 12 × 22 × 7 envelope (DIN 3760 housing size): ring only, lip and spring not drawn

## Questions

**What housing bore does a 12 × 22 × 7 seal need?**

Ø22 × 7 deep.

## Fits with

- [3 in crankcase caps: blind bearing cap, seal cap and 3-port cap](https://xemstudio.com/objects/htd-crankcase-caps-3in/)
- [Build list: HTD engine, 10 in tri-clamp (high-temperature-differential flat engine)](https://xemstudio.com/objects/list-htd-10in/)