Frame for the 2 in tri-clamp elbow diaphragm alpha — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/tri-clamp-diaphragm-alpha-frame/  (CC BY 4.0)
Basis: Positions from the engine layout (tools/gen_diaphragm.py alpha_layout); the feet seats are cut by the fittings' own outer surfaces
Catalog version: 2026-10-20

Sizes: see table below
- One piece: a base plate, a foot under the elbow (its seat is the elbow's outer surface) that carries the cold leg, a foot under the capped run of the hot tee, and a diagonal strut from the base up to a bearing block with two 625 pockets at the crank.
- The strut runs 40–56 mm behind the plane of the legs, clear of every clamp and of the flywheel.

feature  value
base  430 × 130 × 8
crank above elbow centre  257.4, 257.4
bearings  2 × 625

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- ISO: ISO 273 clearance holes for bolts and screws (fine / medium / coarse) — standard — dimensions are facts [verify license at link] — https://www.iso.org/standard/4196.html
- 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/tri-clamp-diaphragm-alpha-frame/index.json
API: https://xemstudio.com/api/geometry?object=tri-clamp-diaphragm-alpha-frame