Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Hi Jim,

I remember many years ago operating then a very old lathe with a flat belt drive that had a clutch consisting of two pulleys side by side mounted on a shaft.  One of the pulleys was fixed to the shaft the other was loose.  By moving the shaft sideways the belt moved from turning the loose pulley onto the fixed pulley so engaging the drive.  I think the gear drive for the head stock was on a spline so not effected by the movement of the shaft. Whether a similar system could be used with a tight round belt would work I don't know. The flat belt using this simple system being a little slack.  A interesting problem.

Take care Tony.

Thanks Tony my first lathe I could loosen a lever and the belt would slip.

Problem I'm having (in my head) to solve is say -

A is the engine pulley, B is the 'clutch' and C is the baker fan pulley I need to be able to disengage and re- engage B

I'm just totally stumped on how (even if its possible) on how to achieve this. I did think of two discs side by side, one with two protrusions and the other with two drills holes the same size as the protrusions and a lever to open and close the the two discs, I was thinking that I could do something along the lines of that, but it would be a pretty almight clunk to get it in 'gear' if the whole mechanism above makes the slightest sense.