Joseph Reid writes:
> The explanation is given by
> http://www.qsicorp.com/images/type-w_large.jpg
> which shows a product that consists of a front and a back plastic molding,
> presumably held together by "colloquial" fasteners. The product does not
> appear to be measurement-sensitive in any way, What if it is held
> together by American screws? American screws will have to be available
> for many years to maintain pre-metric machines.
There are several areas where the product is "measurement-sensitive." Some
of these would be easy to convert (molding in an M3 brass insert rather than
a #4-40 insert; some changes would require modest tooling changes (changing
a boss diameter to accommodate a slightly different diameter screw), and
some would take some substantial tooling changes (a hydraulic, rotating
slide that produces a molded #10-24 thread).
If you have no objection to the continued production of products that
require non-metric fasteners, then this particular mold would not have to be
changed at all.
As I indicated in another email, and has been discussed in another thread,
it seems we have different ideas of what legislated metrication means, based
on our individual experiences and knowledge. I think it this has been
somewhat cleared up in that other thread.
Jim Elwell
