Tri-clamp membrane with a centre hole: 2 in, for a rod through the diaphragm — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/tri-clamp-through-rod-membrane/ (CC BY 4.0) Basis: The 2 in membrane on this site (ISO 2852 Type B section for the clamped ring, 1.0 free span, 3 × Ø2.4 on Ø13) with a Ø5 centre hole; travel and stretch from the sealed generator's crank Catalog version: 2026-10-20 Sizes: see table below - The same membrane as the 2 in diaphragm membrane on this site: Type B bead 5.5 thick from the bore (Ø47.5) to the groove diameter (Ø56.5), web 1.7 out to Ø63, free span 1.0 thick, three Ø2.4 holes on Ø13. It adds a Ø5 hole in the centre, so a Ø3 rod passes through without touching it. - Clamped between the crosshead hub (crankcase side) and the tapped backing disc (working side), the free span runs from Ø20 to Ø47.5 (13.75 mm). At ±6.0 mm travel it forms a 23.6° cone and stretches 9.1 %. - On the sealed generator it carries only the difference between the working space and the crankcase: at most 0.60 bar in the Schmidt estimate at 2 bar gauge charge, about 0.47 bar at the ends of travel, a membrane force of about 1.4 N per mm at the disc edge there. - The seal at the centre is the clamp between the two discs; the rod's own seal is the 15 mm guide bore in the crosshead hub above it. size_in od_mm bead_to_mm free_span_dia_mm free_t_mm centre_hole_mm screw_circle_mm travel_mm stretch_pct 2 63.0 56.5 47.5 1.0 5.0 13.0 ±6.0 9.1 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - ISO (via iTeh sample): ISO 2852 clamp liners: face profile and flange / groove diameters — PDF — standard excerpt; dimensions are facts — https://cdn.standards.iteh.ai/samples/7850/eb49c396488d408c8ced3e2961d76cf3/ISO-2852-1974.pdf - ASME: BPE Bioprocessing Equipment (clamp fitting dimensions, tube OD and wall) — standard — ASME; dimensions are facts [verify license at link] — https://www.asme.org/codes-standards/find-codes-standards/bpe-bioprocessing-equipment - 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-through-rod-membrane/index.json API: https://xemstudio.com/api/geometry?object=tri-clamp-through-rod-membrane