Library › Hardware › Crank webs: Ø8 bore, Ø3 crank pin at 8, 12 and 18 mm throw

2 in crank web

2 in crank web: Ø8 bore on the D-flat shaft with an M3 tapped grub hole, Ø3 pin at 12 mm (24 mm stroke); two per crank

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")

Let your AI pull this. Add https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.
Set it up →

From the full sheet

Crank webs: Ø8 bore, Ø3 crank pin at 8, 12 and 18 mm throw: every size, notes, mating features and sources. What crank web fits an 8 mm shaft with a 3 mm pin?

Other sizes