Xem Studiomeasured geometry

Library › Hardware › Geneva drive: 4 and 6 station wheels, R30, with drive discs

Geneva drive for the 4-station wheel

Geneva drive for the 4-station wheel: 3 mm base with arm, R26.0 locking disc and Ø5 pin at R30.0 in the wheel's plane, Ø5 bore (centre distance 42.4 mm)

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

Geneva drive: 4 and 6 station wheels, R30, with drive discs: every size, notes, mating features and sources. How do I make a Geneva drive?

Other sizes