Re: [CAD_CAM_EDM_DRO] Slightly off-topic : History behind lettered drills

> hence our manufacturing proceeds with imperial.
> Measurement is an exact science but boring !
> Steve Roberts
> Professional Engineer (Canada & UK)
>

Mixed measurement systems are a problem.
IMHO if we had put Km on our interstate hwy system and sold gasoline in liters we would be metric now.
Most of the international manufacturing concerns (car companies) have gone metric. Too many inch tools are coming out of Boeing to
convince me they do much in metric except the military stuff.
Getting standards in the early 19th century when the US started to convert to interchangable parts must have been interesting.
<ugh>

dave