Burner shroud for a 2 in tri-clamp hot end — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/tri-clamp-burner-shroud/  (CC BY 4.0)
Basis: Design values from the sealed generator layout: shell 4 mm clear of the optional fin sleeve's Ø80 fins, open bottom over the torch stand, exhaust windows under the lid; ISO 273 medium clearance (Ø4.5) for the M4 foot screws
Catalog version: 2026-10-20

Sizes: see table below
- A Ø92 / Ø88 shell round the hot end (the cup's closed end, with or without the fin sleeve), from 15 mm below the cup's bottom to 10 mm above the sleeve's top fin. The bottom is open: the torch or burner below fires up into it. A lid closes the top down to Ø54.8, 2 mm clear of the tube, and six 14 × 10 windows under the lid let the gas out sideways once it has passed the fins.
- Three 8 × 8 legs stand it on the frame base; each leg's 20 × 12 × 4 foot runs outward and takes an M4 × 10 into a tapped hole in the base, clear of the leg. The shroud touches nothing else: not the head, not the fins, not the torch stand.
- The 4 mm annulus between the sleeve's fins and the shell keeps the flame gas against the fins (without the sleeve, against the bare tube). The heat source is the builder's choice: a propane or butane torch head in the torch stand, or a natural-gas or biogas burner that fires into the open bottom.

feature  value
shell  Ø92 / Ø88
above the base  70 to 138.5
lid opening  Ø54.8
exhaust  6 × 14 × 10 under the lid
legs  3 × 8 × 8 on r 49, feet 20 × 12 × 4, Ø4.5 at r 59
gap to the fins  4.0

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-burner-shroud/index.json
API: https://xemstudio.com/api/geometry?object=tri-clamp-burner-shroud