Re: [ATM] Another machining question, please

[James Crombie <jamescrombie@jamescrombie.com>]

  Thomas

  You could do it with the forsten bits, but use it first before 
drilling the through hole.  If you drill the through hole first it is 
difficult to keep the forstner bit centered.  You also want to clamp the 
part down well with a couple of C-clamps or equivelent.  Use the lowest 
speed possible and some lubrication.  Parafin wax makes a good cutting 
lube for cutting aluminum.

James Crombie
http://www.jamescrombie.com

Thomas A Simmons wrote:

>  I want to have 3 flat bottom holes ~ 3/4 to 7/8 inch in 6061 Aluminum. I
>don't have access to a lathe
>
>
>or mill, but do have a benchtop drill press.Could I drill the holes to
>depth with common metal drill bits
>
>
>and then run a Forstner bit down after it? All I really need flat is a 3/16
>inch lip for a nut to rest on. I would
>
>
>assume this would ruin the Forstner bit...
>
>
>
>
>
>  Since I'm effectively "homebound now" due to medical issues, taking it
>locally to a machine shop or
>
>
>shipping it anywhere isn't going to work.
>
>
>
>
>
>Tom
>
>
>Too stubborn to quit being an ATMer
>
>_______________________________________________
>ATM mailing list http://www.atmlist.net/
>
>
>  
>
_______________________________________________
ATM mailing list http://www.atmlist.net/