# Crank stand for a 623 bearing, 40 / 60 / 80 mm

> What are the dimensions of a crank stand for a can Stirling engine?

- Category: Stirling engines › Can & LTD engines
- Kind: Standard part
- Basis: 623 bearing (3 × 10 × 4) pocket at the bearing OD; M3 clearance Ø3.4 (ISO 273) feet
- Page: https://xemstudio.com/objects/can-engine-crank-stand/ · JSON: https://xemstudio.com/api/geometry?object=can-engine-crank-stand · Plain text: https://xemstudio.com/objects/can-engine-crank-stand/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses

**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

- An upright 40 wide × 8 thick on a 40 × 24 × 3 foot, in three heights: 40, 60 and 80 mm.
- A Ø10 pocket through the 8 mm upright, centred 8 mm below the top, holds a 623 bearing (fit: press) for the Ø3 crankshaft: shaft height 32, 52 or 72 mm.
- Two Ø3.4 foot holes at (−15, 8) and (15, −8) take M3 screws to the base. A crank uses two stands, one each side.

## 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 |
|---|---|---|---|---|
| stand bearing pockets | Ø10 | 623 bearing | press | crank-stand-* |
| stand foot holes | Ø3.4 | M3 screw clearance | designed | crank-stand-* |

## Sizes

| file | height | shaft axis height | bearing pocket | foot |
|---|---|---|---|---|
| crank-stand-40 | 40 | 32 | Ø10 × 8 | 40 × 24 × 3 |
| crank-stand-60 | 60 | 52 | Ø10 × 8 | 40 × 24 × 3 |
| crank-stand-80 | 80 | 72 | Ø10 × 8 | 40 × 24 × 3 |

## Where the files are

- Wikipedia: [Stirling engine](https://en.wikipedia.org/wiki/Stirling_engine) — web — CC BY-SA 4.0 (text)
- Long Earth Society: [Can engine build](https://longearthsociety.com/engineering/) — video, web — LES site
- Long Earth Society: [Engine builds (videos and write-ups)](https://longearthsociety.com/engineering/) — web, video — LES site

## Free STEP/STL (3 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/can-engine-crank-stand/index.json

- crank-stand-40: [STEP](https://xemstudio.com/files/hardware/can-engine-printed-kit/crank-stand-40.step) · [STL](https://xemstudio.com/files/hardware/can-engine-printed-kit/crank-stand-40.stl) — crank stand 40 mm, Ø10 pocket for a 623 bearing (Ø3 shaft), 2 × M3 clearance (Ø3.4) foot holes
- crank-stand-60: [STEP](https://xemstudio.com/files/hardware/can-engine-printed-kit/crank-stand-60.step) · [STL](https://xemstudio.com/files/hardware/can-engine-printed-kit/crank-stand-60.stl) — crank stand 60 mm, Ø10 pocket for a 623 bearing (Ø3 shaft), 2 × M3 clearance (Ø3.4) foot holes
- crank-stand-80: [STEP](https://xemstudio.com/files/hardware/can-engine-printed-kit/crank-stand-80.step) · [STL](https://xemstudio.com/files/hardware/can-engine-printed-kit/crank-stand-80.stl) — crank stand 80 mm, Ø10 pocket for a 623 bearing (Ø3 shaft), 2 × M3 clearance (Ø3.4) foot holes

## How it fits

### Goes in or on
- [Ball bearings, 683 to 6210 and flanged F6xx (ISO 15)](https://xemstudio.com/objects/ball-bearings-metric/): 623 pressed in the Ø10 pocket

### Connects to
- [Crankshafts Ø3, Ø5 and Ø8 with full-length D-flat](https://xemstudio.com/objects/stirling-crankshafts/): Ø3 crankshaft through the 623s
- [Craft sticks 114 × 10 × 2 mm and jumbo 150 × 18 × 2 mm](https://xemstudio.com/objects/craft-sticks/): Ø3 skewer as the crankshaft
- [CD and HDD-platter flywheel hubs: Ø15 and Ø25 spigots for Ø3 / 5 / 8 shafts](https://xemstudio.com/objects/flywheel-disc-hub/): Ø3-bore hub on the same shaft

### Alternatives
- [LTD crank stand for a 623 bearing, axis 112 above the foot](https://xemstudio.com/objects/ltd-crank-stand/): 45 mm stand for the LTD engine

## Questions

**What bearing does the crank stand take?**

A 623 (3 × 10 × 4) in the Ø10 pocket, for a Ø3 crankshaft or skewer.

**How high is the crankshaft on each stand?**

8 mm below the top: 32, 52 or 72 mm above the foot for the 40, 60 and 80 mm stands.

## Fits with

- [Ball bearings, 683 to 6210 and flanged F6xx (ISO 15)](https://xemstudio.com/objects/ball-bearings-metric/)
- [Crankshafts Ø3, Ø5 and Ø8 with full-length D-flat](https://xemstudio.com/objects/stirling-crankshafts/)
- [CD and HDD-platter flywheel hubs: Ø15 and Ø25 spigots for Ø3 / 5 / 8 shafts](https://xemstudio.com/objects/flywheel-disc-hub/)
- [LTD crank stand for a 623 bearing, axis 112 above the foot](https://xemstudio.com/objects/ltd-crank-stand/)
- [Build list: Soda-can gamma](https://xemstudio.com/objects/list-can-engine/)