# 90° V block for two 10 mL syringes

> How do I hold two syringes at 90° for an alpha Stirling layout?

- Category: Stirling engines › Drives & mechanisms
- Kind: Hardware
- Basis: Two sockets at the 10 mL barrel OD Ø15.9, axes at ±45°
- Page: https://xemstudio.com/objects/syringe-v-block-90/ · JSON: https://xemstudio.com/api/geometry?object=syringe-v-block-90 · Plain text: https://xemstudio.com/objects/syringe-v-block-90/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

- A 70 × 24 × 40 block with two Ø15.9 sockets (fit: socket) for 10 mL syringe barrels, their axes at ±45° (90° between them).
- The axes meet 4 mm below the block's base, too close for a crank under it: it is a layout piece for showing the V. The running V-twin is the alpha V-twin frame.

## 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 |
|---|---|---|---|---|
| V-block sockets | Ø15.9 | 10 mL syringe barrel | socket | v-block-* |

## Sizes

| parameter | value |
|---|---|
| block | 70 × 24 × 40 |
| sockets | 2 × Ø15.9 |
| angle between axes | 90° |
| axes meet | 4 below the base |

## Where the files are

- Wikipedia: [Stirling engine](https://en.wikipedia.org/wiki/Stirling_engine) — web — CC BY-SA 4.0 (text)
- 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/syringe-v-block-90/index.json

- v-block-90-2x-syringe-10ml: [STEP](https://xemstudio.com/files/hardware/alpha-twin-crank-90/v-block-90-2x-syringe-10ml.step) · [STL](https://xemstudio.com/files/hardware/alpha-twin-crank-90/v-block-90-2x-syringe-10ml.stl) — for a running V-twin use the alpha V-twin frame)

## How it fits

### Goes in or on
- [Plastic syringes 1–60 mL as pistons and cylinders](https://xemstudio.com/objects/plastic-syringes/): 10 mL barrels in the Ø15.9 sockets

### Alternatives
- [Alpha V-twin frame for two 10 mL syringes at 90°](https://xemstudio.com/objects/alpha-v-twin-syringe-frame/): the running V-twin frame

## Questions

**Can the V block run as an engine?**

No: its axes meet 4 mm below the base, with no room for a crank. Use the alpha V-twin frame.

**What fits the V block sockets?**

10 mL syringe barrels, Ø15.9 outside.

## Fits with

- [Alpha V-twin frame for two 10 mL syringes at 90°](https://xemstudio.com/objects/alpha-v-twin-syringe-frame/)
- [Plastic syringes 1–60 mL as pistons and cylinders](https://xemstudio.com/objects/plastic-syringes/)
- [Two-pin crank disc, pins 90° apart, 6 / 8 / 10 mm throw](https://xemstudio.com/objects/two-pin-crank-disc-90/)