Balance Spring Progress | Model Engineer
Without your help, I think I would now be ankle deep in twisted guitar strings. With reference to my latest photograph in my John Stevens Skeleton Clock album, and a section of Machinery’s Handbook about mandrel (arbor) sizes , here are some of the facts built into my first respectable attempt. Method The mandrel was machined down to size and cross drilled 1.0mm diameter next to the root radius. The free end of the guitar string was threaded through this hole, and the unsupported (cantilevered) mandrel given a couple of turns to `catch’ the wire. The guitar string was then passed over a...
Source: model-engineer.co.uk