Re: [CAD_CAM_EDM_DRO] Re: Re:Lathe threading

> I'm not possitive but I believe there was a size called 3/16-24. Sorta
> like the 14-20 taps I had. I thought they were 1/4-20 but they are not the
> same. All sorts of strange sizes have gone away and it is still difficult.
> Think what it musta been like 100 years ago

100 years ago things were much simpler - a man did one kind of job and that
job usually would only use one kind of thread.Machine tools and anything
else made of iron or steel used Whitworth, brass things used British
Standard Brass for larger sizes and B.A. for little 'uns, plumbers used
'Plumbers thread or British Standard Taper, gasfitters used Gas thread,
cycle makers used British Standard Bike thread.....etc. Each trade had its
own thread and, since there was little working across trades, a person would
probably only see one or two thread types in his whole working life.
Nowadays, especially amongst those of us who are able to enjoy leisure
interests (something our forebears didn't see much of), we tend to dabble in
all sorts of different fields and thus come across far more variety than our
predecessors ever would.

Ian
--
Ian W. Wright
Sheffield UK