# Displacer-rod clevis for a Ø2 rod, pin 51.5 up

> How do I join a 2 mm displacer rod to a con-rod?

- Category: Hardware › Stirling & thermoacoustic
- Kind: Hardware
- Basis: My geometry: a Ø2 socket for the rod and the same 12 × 12 fork as the plunger clevis
- Page: https://xemstudio.com/objects/mug-ltd-rod-clevis/ · JSON: https://xemstudio.com/api/geometry?object=mug-ltd-rod-clevis · Plain text: https://xemstudio.com/objects/mug-ltd-rod-clevis/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

- Ø8 shank with a Ø2 × 10 socket from the bottom (the rod presses in), fork with a 5 mm slot and a Ø3 pin hole 51.5 above the bottom; on the mug LTD it carries rod-2x100's top to the height of the plunger clevis's pin, so both con-rods are 45 long.

## 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 |
|---|---|---|---|---|
| rod socket | Ø2 × 10 | Ø2 displacer rod | press | all |
| fork slot | 5 | 5 mm con-rod | run | all |
| pin hole | Ø3 | dowel-3x12 | press | all |

## Sizes

| feature | size_mm |
|---|---|
| rod socket | Ø2 × 10 |
| pin height | 51.5 |
| fork | 12 × 12, slot 5 |

## Where the files are

- Long Earth Society: [Engine builds](https://longearthsociety.com/engineering/) — web, video — LES site

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

Index: https://xemstudio.com/files/hardware/mug-ltd-rod-clevis/index.json

- rod-clevis-2mm-p51: [STEP](https://xemstudio.com/files/hardware/mug-ltd-rod-clevis/rod-clevis-2mm-p51.step) · [STL](https://xemstudio.com/files/hardware/mug-ltd-rod-clevis/rod-clevis-2mm-p51.stl) — displacer-rod clevis: Ø8 shank with a Ø2 × 10 socket for the 2 mm rod, 12 × 12 fork (5 mm slot) with a Ø3 pin hole 51.5 above its bottom

## Questions

**What joins the displacer rod to the con-rod on the mug LTD?**

This clevis: rod in its Ø2 socket, con-rod on a dowel-3x12 through its fork.

## Fits with

- [Build list: Mug LTD (sits on a coffee mug)](https://xemstudio.com/objects/list-ltd-mug/)
- [LTD Stirling bottom plate, Ø120 and Ø170](https://xemstudio.com/objects/ltd-bottom-plate/)
- [LTD Stirling top plate with syringe socket, Ø120 and Ø170](https://xemstudio.com/objects/ltd-top-plate/)
- [Glass syringes 1–50 mL (all-glass, ground-glass plunger): barrel and plunger](https://xemstudio.com/objects/glass-syringes/)