Mug LTD bottom plate Ø90 × 6 (sits on an 11 oz mug) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/mug-ltd-bottom-plate/  (CC BY 4.0)
Basis: Ø90 chosen to sit on an 11 oz mug (rim Ø82.55 = 3.25 in, listing cited) with 3.7 mm overhang; proportions scaled from the LTD kit
Catalog version: 2026-10-20

Sizes: see table below
- Ø90 × 6 hot plate. The 11 oz mug's rim is Ø82.55 (3.25 in); the plate overhangs it by 3.7 mm all round and its underside is flat: the chamber screws go into M3 tapped holes (Ø2.5 tap drill, through) and stop 2 mm above the underside, so nothing stands proud where the plate rests on the rim.
- 5 × M3 tapped on R41 at 60°, 120°, 180°, 240° and 300° (0° is under the syringe socket); the chamber ring and the top plate stack on it (ring 23, top plate 3) and five M3 × 30 from the top plate reach 4 mm into it.

feature  size_mm
plate  Ø90 × 6
screw circle  R41, 5 × M3 tapped Ø2.5
mug rim (11 oz)  Ø82.55

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Atlanta Vinyl Store: Premium 11 oz sublimation mug: 3.75 in H × 3.25 in D — web — listing [verify license at link] — https://atlantavinylstore.com/products/premium-11oz-sublimation-mugs
- James R. Senft: An Introduction to Low Temperature Differential Stirling Engines — book — Moriya Press [verify license at link] — https://www.stirlingengine.com/
- Wikipedia: Stirling engine — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Stirling_engine
- 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/mug-ltd-bottom-plate/index.json
API: https://xemstudio.com/api/geometry?object=mug-ltd-bottom-plate