Re: [CAD_CAM_EDM_DRO]spindle plans (was VFD Selection)

I did see a spindle design that was really just two caged ball bearings in a
tube sized for the outer diameter of the bearings which had an I/D of a std
stock silver steel precision ground rod which was held in place by grubcrews
rings top and bottom, the design was used to mill 8mm alloy. Access to a
lathe is that is necessary to build it.If thats of any help?.

Nick

----- Original Message -----
From: "Leslie M. Watts" <leswatts@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, April 14, 2004 12:55 AM
Subject: RE: [CAD_CAM_EDM_DRO]spindle plans (was VFD Selection)


> I did find a not very detailed autocad drawing of the spindle.
> Can you read an autocad .dwg or .dxf?
>
> As to your hobby type mill (a mill drill?)...
> one of the most fascinating things about machine tools is that
> one can build a more accurate machine FROM a lesser accurate
> machine- and this is one of the founding principles of the industrial
> revolution. After all we started with a couple of rocks...right?
>
> If there is some interest in a home built metal cutting cnc spindle
perhaps
> I could write something up and put it on the website. I am not a hobbyist,
> but I limit posts here to hobbyist issues and try to put up useful
> information on the website.
>
> I should advise that fabricating such a thing requires that you have
> a metal lathe, tool post grinder or cylindrical grinder, and surface
> grinder.
>
> It also requires a willingness to part with $150 or so for bearings.
>
> Ought to talk to Bob Campbell or Doug Fortune about kitting something
up....
>
> Leslie M.Watts
> L M Watts Furniture
> Tiger Georgia USA
> (706) 212-0242
> http://www.lmwatts.com
> Engineering page:
> http://www.lmwatts.com/shop.html
> CNC surplus for sale:
> http://www.lmwatts.com/forsale.html
> CNC carved signs:
> http://www.lmwatts.com/signwp.html
>
>
>
>
> -----Original Message-----
> From: george_barr [mailto:george_barr@...]
> Sent: Tuesday, April 13, 2004 6:39 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Re: VFD Selection
>
>
> Leslie,
> I currently do not have a precision mill (only a hobby inaccurate
> mill). I plan to use my current hobby mill to create my more precise
> gantry mill and for this I need to make many holes in mild steel. Do
> you have a picture of your spindle? For milling mild steel, I will
> need a spindle/motor that runs at 800 - 1200 rpm approximately.
> Thanks,
>
>
>
>
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