On 3 Jan 2007 04:39:55 -0800, "mhorowit" wrote:


Roger wrote:
On Tue, 02 Jan 2007 10:10:23 -0500, Michael Horowitz
wrote:


There is also a V-Block with a series of drill holes that you just lay
on the bolt and have at it. This has the advantage, or disadvantage
(depending on how you look at it) as to allowing you to drill what
ever size hole you want as opposed to what is properly required.
You'll find these around machine shops.


Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com

Good morning Roger - problem with a v-block is that you still need to
insure the drill passes thru the center of the bolt; unless you know a
trick, the v-block will get me perpendicular to the shank, but does
nothing for centering the drill-bit (unless you know a secret???) - Mike

Lay the bolt in the "V" with the threads over the desired hole. Clamp
the bolt in place using a block of wood to protect the threads. The
bolt should be centered in the "V" along with the drill hole.
Conversely place the bolt at the proper position in the "V", invert
the whole works and clamp it to a wood block. The crill should be
centered on the bolt and the block will protect what ever you would
have drilled without it...bench tops..etc:-))


Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com