Wrist pin Ø3 × 16 — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/wrist-pin-3x16/  (CC BY 4.0)
Basis: Ø3 at the piston boss and crosshead holes (fit: press); 0.4 chamfer both ends
Catalog version: 2026-10-20

Sizes: see table below
- A Ø3 × 16 pin, 0.4 mm chamfer on both ends.
- It presses into the power piston's wrist-pin boss or through the crosshead's cheeks (fit: press); the con-rod end turns on it.

parameter  value
diameter  3
length  16
chamfers  0.4 both ends

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Wikipedia: Crosshead — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Crosshead
- Wikipedia: Piston — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Piston
- James R. Senft: Miniature Stirling engine piston fits (LTD book) — book — reference [verify license at link] — https://www.stirlingengine.com/
- Long Earth Society: Engine builds — web, video — LES site — https://longearthsociety.com/engineering/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/wrist-pin-3x16/index.json
API: https://xemstudio.com/api/geometry?object=wrist-pin-3x16