# 2 in double-faced guide plate for a hollow Ø10 piston rod

> How do I guide a piston rod inside a tri-clamp crankcase?

- Category: Hardware › Stirling & thermoacoustic
- Kind: Hardware
- Basis: ISO 2852 faces on both sides as the clamp-in bearing plate on this site; bushing size from its standard
- Page: https://xemstudio.com/objects/tri-clamp-guide-plate/ · JSON: https://xemstudio.com/api/geometry?object=tri-clamp-guide-plate · Plain text: https://xemstudio.com/objects/tri-clamp-guide-plate/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

- Clamped between the power cylinder and the reducer with a gasket and a clamp on each face. Two 10 × 14 × 15 sleeve bushings 48.4 mm apart guide the hollow piston rod, so the con-rod's side load never reaches the piston. Four Ø8 vents connect the back of the piston to the crankcase (the buffer).

## 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 |
|---|---|---|---|---|
| faces | ISO 2852 2 in both sides, 16 apart | Type B gaskets, 2 in clamps | clamp | all |
| bushing seats | Ø14 × 15 at z −2.4 and 46 | 10 × 14 × 15 sleeve bushings | press | all |
| vents | 4 × Ø8 on r 17 | buffer passage (no contact) | designed | all |

## Sizes

| feature | value |
|---|---|
| thickness | 16.0 |
| boss | Ø22, z −2.4 to 61 |
| seats | Ø14 × 15 at both ends |
| vents | 4 × Ø8 on r 17 |

## Where the files are

- ISO (via iTeh sample): [ISO 2852 clamp liners: face profile and flange / groove diameters](https://cdn.standards.iteh.ai/samples/7850/eb49c396488d408c8ced3e2961d76cf3/ISO-2852-1974.pdf) — PDF — standard excerpt; dimensions are facts
- ASME: [BPE Bioprocessing Equipment (clamp fitting dimensions, tube OD and wall)](https://www.asme.org/codes-standards/find-codes-standards/bpe-bioprocessing-equipment) — standard — ASME; dimensions are facts (verify at link)
- 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/tri-clamp-guide-plate/index.json

- guide-plate-2in-10mm: [STEP](https://xemstudio.com/files/hardware/tri-clamp-guide-plate/guide-plate-2in-10mm.step) · [STL](https://xemstudio.com/files/hardware/tri-clamp-guide-plate/guide-plate-2in-10mm.stl) — 2 in double-faced guide plate: ISO 2852 faces at z 0 and 16, guide boss Ø22 from z −2.4 to 61, two Ø14 seats for 10 × 14 × 15 bushings (−2.4–12.6, 46–61), four Ø8 vents on r 17

## Questions

**Why two bushings?**

One bushing is a pivot; two 48 mm apart hold the rod straight.

## Fits with

- [2 in × 3 in spool with the bore finished Ø48.00 (bored and honed power cylinder)](https://xemstudio.com/objects/tri-clamp-spool-bored-honed/)
- [Ground rods, hollow piston rod and crank shafts for the performance engines (Ø6, Ø8, Ø10 / 7)](https://xemstudio.com/objects/stirling-precision-rods/)
- [Build list: Tri-clamp charged beta, 2 in](https://xemstudio.com/objects/list-tri-clamp-charged-beta/)