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Originally Posted by Plowboy  This will really sound strange, but I have done this many times. Go to the plumbing section of a hardware store. Depending on the size of your bit, purchase a section of pipe just short of the depth you need to drill that will just slide over your bit. By the threaded flatplate for that pipe size. Thread the flatplate and pipe together and clamp over where you need to drill. The pipe acts as a guide and you get a straght hole.
If you cant find a pipe close enough a hollowed wood dowel in the pipe will work to take up the space. |
This is what I'm planning, it isn't worth being a perfectionist here. One of the guys I work with at the machine shop made this suggestion yesterday. It is like a dowling jig used for wood working. I will probably build it from some scrap 316 stainless I have at the shop. It is a harder alloy than the steel bracket, this will keep the jig from being cut before the steel is, as the jig will be reused several times. I will drill two 3/4" one just larger at .775" holes in a block on the mill. I will sleeve the larger one for the drill bit, one will bolt into the hole I am relocating. On the mill I can make the holes exactly 1.5" apart on this jig. This should keep me fairly accurate all around! Thanks for the great suggestion plowboy, would be a great way for others to build this, especially! I am lucky to have access to a machine shop to build my crap!
won't be much work + I'll get to use the tig welder, and that's just fun!
Thanks to all!!!!!!!!!!!