Hi Gary
You want to get the best bit you can find for this job..
Because the hole is not to deep the standard bit will do the trick..
But with carb.tip type..made to plunge in with a flat bottom,note the cutter on TOP of the bit,,,
http://www.cheyennesales.com/catalog/cmtstraightmet.htm http://www.cheyennesales.com/catalog/rbitindex.htm
5mm part number 811.050.11 with 1/4" shank...
Here's a small tip,,,,use a 3/4" brass guide,(this will give a place for the chips that come out of the hole) and make a line up pin with a 3/4" dowel rod...use the bit to put in a 5mm hole in the center of the dowel plug,then put the plug in the jig hole (3/4") and super glue one of the shelft pins in the dowel plug, make two...drill the 1st hole drop in the line up plug then do the next one and put the 2nd plug in place this will keep the jig set just right for the rest of the holes...
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Originally Posted by garycurtis First off, who makes metric size bits? I would need a 5mm. Secondly, I plan on using my new plunge router to bore shelf pin holes. A lot of holes.
Would there be any advantage to having a spiral bit over a straight flute? Would wear on the bit itself be a big issue?
Gary Curtis |