Re: [CAD_CAM_EDM_DRO] Re: Very Confused!! Need help.

On Friday 05 January 2007 13:50, Ken Campbell wrote:

> I occasionally see on EBAY a high quality air spindle, small ones run $400
> or so if you get lucky, and usually run 30-80 K rpm with 80 psi or so air
> ( and make sure you have enough cfm also ). Make sure you get at least one
> 1/8 inch collet with it, you could make adapters in a lathe for smaller
> bits if needed . Usually you can various sized cutters with 1/8 inch
> shanks.
>
> Consider also putting a piece of ( 1/2 inch?? ) round bar in your hand
> drill chuck and lower it over a mounted stationary upward pointed drill bit
> of the size you use .... then leave the " bored out " bar in the chuck
> forever, and hold the drill bits in with a setscrew at 90 degrees. some
> better, but also not quite pro.
>
> just some ideas.
>
> regards, ken campbell, deltawerkes

Listmembers have also had good luck with the Proxxon IB/E rotary tool:
http://www.minicrafttools.com/38481.html
which is cheaper, at ~$100. Not as good as a high quality air spindle, but
folk seem to be satisfied.

Along with rotary tools, people are also using laminate cutters. Dig through
the list archives or ask for firm suggestions, you'll get lots.

I'd also suggest you pick up some books, like a copy of Machinery's Handbook
and "Machine Shop Essentials" by Frank Marlow.

Regards,
Sebastien Bailard
RepRap.org - self-replicating 3D printer project.