Con-rods and links with a 626 big end and a 625 small end: 55 to 488 mm — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/stirling-conrods-626-625/  (CC BY 4.0)
Basis: 626 and 625 sizes from their standards; lengths are design values
Catalog version: 2026-10-20

Sizes: see table below
- At 5 bar gauge the piston force swings about ±307 N; a 626 big end on a Ø6 crank pin and a 625 small end on the Ø5 wrist pin carry it on ball bearings.

length_mm  big end  small end
100.0  626  625
120.0  626  625
55.0  626  625
60.0  626  625
488.4  626  625

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Long Earth Society: Engine builds — web, video — LES site — https://longearthsociety.com/engineering/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 5 parts): https://xemstudio.com/files/hardware/stirling-conrods-626-625/index.json
API: https://xemstudio.com/api/geometry?object=stirling-conrods-626-625