Re: Helical Threading

--- In CAD_CAM_EDM_DRO@egroups.com, "Ian Wright" <Ian@i...> wrote:

> > diameter being 16mm or 5/82 so
>
> How d'you measure this then John, would I need a 'surplus'

micrometer from

> Anchor Supplies or something? It all seems a bit too accurate for

me.;o)

>

Ian
Doesn't everyone work in eighty tooths?
We adopted this from the earlier 79 th's as these were harder to do
in your head.
Some of the earlier measurements like poles and perches are very hard
to use on CNC's
Tolerances can work out to plus or minus a zip code.

My apologies for hitting the 2 instead of "
On a UK keyboard the " and @ are reversed