Regenerator matrix disc Ø44 / Ø32 × 0.5 mm (mesh counts #40–#200) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/regenerator-mesh-disc/  (CC BY 4.0)
Basis: ASTM E11 wire-mesh geometry (mesh count, wire diameter, opening); discs drawn at the regenerator cage bores, Ø44 and Ø32 × 0.5, Ø3 centre hole
Catalog version: 2026-10-20

Sizes: see table below
- The file is one regenerator matrix disc at its exact size: the bore of its cage (Ø44 or Ø32) × 0.5 mm, with a Ø3 centre hole the displacer rod passes through, drawn as a solid disc (the mesh weave is not modelled).
- Mesh count → wire Ø / opening (ASTM E11): #40 0.25 / 0.42 mm, #60 0.19 / 0.25, #80 0.14 / 0.18, #100 0.10 / 0.15, #150 0.066 / 0.104, #200 0.053 / 0.074.
- Regenerators use #100–#200 discs stacked loosely to 60–70 % porosity; #40–#60 suits low-temperature demonstrators where flow loss matters more than heat capacity.
- On my engines the regenerator is a split cage filled with a stack of #100 matrix discs.

mesh  wire_mm  opening_mm  use
#40  0.25  0.42  low-temperature demonstrator
#60  0.19  0.25  low-temperature demonstrator
#80  0.14  0.18  regenerator
#100  0.1  0.15  regenerator
#150  0.066  0.104  regenerator
#200  0.053  0.074  high-temperature regenerator

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Wikipedia: Mesh (scale) — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Mesh_(scale)
- Wikipedia: Regenerative heat exchanger — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Regenerative_heat_exchanger
- Wikipedia: Steel wool — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Steel_wool
- McMaster-Carr: Wire cloth (free STEP per part, for your own design use; no redistribution) — STEP, PDF — McMaster-Carr site terms [verify license at link] — https://www.mcmaster.com/products/wire-cloth/
- Long Earth Society: Engine and rig builds — web, video — LES site — https://longearthsociety.com/engineering/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 2 parts): https://xemstudio.com/files/hardware/regenerator-mesh-disc/index.json
API: https://xemstudio.com/api/geometry?object=regenerator-mesh-disc