15 CNC parts ordered, December 2025

Clamp-on drive for Auma GK25.2 valve gearboxes

A servo drive that clamps to the pipe and turns an existing 2,000 Nm Auma gearbox at its input, so a water plant can motorise its valves without replacing the gearboxes.

The hard part

Motorise 2,000 Nm gearboxes while leaving them in place, with a 180 Nm servo at the input.

What I built

Torque sizing, FEA on the clamp, gears and shaft, battery and control boxes, cable harness, BOM and machining drawings.