Re: ATM Grit for roughing out

["James W. Burrows" <burrjaw@halcyon.com>]

On Thu, 22 Aug 1996 craig_kerr@odp.tamu.edu wrote:

> How big can it go?  I dropped by a craft shop and picked up some
> rock polishing grit. Since they were labeled coarse, medium, fine,
> etc., I picked up the coarse.  It is huge.  It dwarfs the 80 I was 
> using.  Is there any problem with using grit drastically larger 
> than 80?  

I once used (pounds of) #60 AlOX to hog out a 10" f/1 Hindle sphere.
Seemed to work OK with a standard series afterward, starting w/#80.

     Jim Burrows    206-244-2933
     E-mail:        burrjaw@halcyon.com
     Seattle:       WGS84 lat 0.828547, long -2.135692 (rad)