Mug LTD displacer Ø72 × 6 — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/mug-ltd-displacer/  (CC BY 4.0)
Basis: 2 mm radial gap to the Ø76 chamber like the LTD kit; swept volume at 15 mm stroke 61.1 mL
Catalog version: 2026-10-20

Sizes: see table below
- Ø72 × 6 with a Ø2 bore for the rod (pressed through, flush at the bottom). Swept volume 61.1 mL against the 5 mL glass piston's 1.87 mL: ratio 33.
- 2 mm radial gap to the chamber wall (designed); 1 mm end gaps at the ends of travel.

feature  value
displacer  Ø72 × 6
stroke  15
swept volume  61.1 mL
volume ratio  33

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-displacer/index.json
API: https://xemstudio.com/api/geometry?object=mug-ltd-displacer