# Machine Pin Large Short

Adom **press-fit machine pin** (Large / Short) for the Adom modular electronics
system. A machine **pin** (`MP`) presses into a plated through-hole and mates with a machine
**contact** (`MC`) on a stacked board (32mm scaffold grid). This page carries the corrected KiCad +
**Fusion 360 `.lbr`** library and an interactive 3D insertion view.

## Mounting: press-fit (Mill-Max style)

The **Ø3.6mm** pin body presses into a **Ø3.45mm** plated hole -> **0.15mm
diametral interference** (solderless press-fit; solder-assisted with the 300um jet paste on the
annular ring). The hole is intentionally undersized; this is correct, not a clearance fit.

## Dimensions (measured from the STEP)

| Feature | Value |
|---|---|
| Pin body OD (press-fit) | **Ø3.6 mm** |
| Seating flange OD | Ø4.8 mm |
| Tip / lead-in OD | Ø1.85 mm |
| Total height | 18.74 mm (8.4 above board, 10.34 below) |
| Footprint pad | Ø5.2 mm |
| Footprint drill (plated) | Ø3.45 mm |

## Files

- **Fusion 360 library:** `MachinePinLargeShort.lbr` (EAGLE/Fusion, round thru-hole pad + real pin outline symbol)
- KiCad: `MachinePinLargeShort.kicad_sym`, `MachinePinLargeShort.kicad_mod`; STEP: `MachinePinLargeShort.step`
- 3D viewer above shows the pin in a 1.6mm FR4 board (50% transparent) with the annular pads,
  the 300um jet-paste dots, and the press-fit insertion animated.

## Paths / provenance

- Original KiCad source: [`adom-inc/adom-kicad-library`](https://github.com/adom-inc/adom-kicad-library/tree/new-v1.1) (MachineContact + MachinePin).
- All Adom machine pins in one Fusion library: **[Adom Machine Pins - Fusion Library](https://wiki.adom.inc/adom/adom-machine-pins-fusion-lbr)**.