It does not seem difficult (though tedious) with an indexing table on a vertical mill Raymond, common in most machine shops. If anyone chooses to do this, I have had excellent experience drilling aluminum (a daily chore) using a bullet point drill (used to be black and decker, currently dewalt) and bacon/sausage fat (donated to my shop from the local fireman pancake breakfast as i am a vege). it does not
wander and I have been using the same bits for years, the 3/16 (for tapping 1/4-20) making thousands of holes.
gabriel (a valiant attempt at staying on topic) romeu chesterfield, nuevo jersey, north america
Raymond Dobbins wrote:
> Has anyone ever seen more intricate drilling on a chainring? I know I haven't. I think it is even more intricate than Art Stump's chainrings.
Is this a lost art, or does anyone here know of somebody who can still d o this kind of work?
> Ray Dobbins
> Miami Florida
> John Barron <firstname.lastname@example.org> wrote:
> I finally have pics posted of the 1970 Schwinn Paramount that I got i n
> Charlotte, NC
> John Barron