Re: [CAD_CAM_EDM_DRO] re:leadscrew bearings / machine design

> 2nd tip. Ask YOUR SUPPLIERS what is COMMON, before specifying a
> bearing(or other part). You may find that the industrial supplier
> near you has "stocked up" to supply some mfr. or provide replacement
> parts very near to what you need. At greatly reduced cost. For
> instance, a 10mm bore(.393) may be a much different cost(more or
> less) than a 3/8(.375). Same for O.D., or thickness. You can probably
> change the design to use either one, if you do it BEFORE you build
> the part(s) you have designed.

I've heard it said that anything used in a car is by definition cheap
- given the economies of scale. The logic question that follows in my
mind is then, where can I get a list of a typical auto parts store's
inventory, organized by specification, not by intended use? I mean to
know that this particular widget will work on a Chevy as this and on a
Toyata as that requires comparing quite a few details of its
dimensions and performance - so wouldn't it be nice if we could see
that data and decide thus that it will also work on a CNC machine as
something entirely different?

Chris

--
Christopher C. Stratton, stratton@...
Instrument Maker, Horn Player & Engineer
22 Adrian Street, Somerville, MA 02143
http://www.mdc.net/~stratton
(617) 629-9830 home (temporary), 253-2606 MIT