Library › Hardware › 2 in diaphragm hub and tapped backing disc for a through rod

crosshead hub

crosshead hub: Ø20 × 3 disc with 3 × Ø2.4 on Ø13, Ø8 boss to 15, Ø3 bore 15 long (rod guide and bleed), bar z 5.5–9.5 to an arm x 13.5–18.5, Ø3 pin hole along X at 29.25

Exact dimensions. True size, no printing tolerance added. Threads are plain cylinders at the major diameter.

STEP STL free, CC BY 4.0 (credit "Xem Studio")

Dimensions

part	hub
feature	disc
value	Ø20 × 3, 3 × Ø2.4 on Ø13

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From the full sheet

2 in diaphragm hub and tapped backing disc for a through rod: every size, notes, mating features and sources. How does a rod attach to the centre of a tri-clamp diaphragm?

Other sizes

tapped backing disc Ø20 × 2