|Forum topic by niki||posted 05-21-2007 11:25 PM||2955 views||1 time favorited||4 replies|
05-21-2007 11:25 PM
Usually, when we want to drill small hole and large hole at the same center, we start with the large hole and using the center dot, we drill the small hole.
But, I like to prepare a bunch of “wheels”, cut with the “Hole saw” that has 1/4” drill, to use as knobs for jigs.
I don’t know if the small hole will be 1/4”, maybe I shall have to enlarge it to 5/16” or 3/8” and also, I don’t know what will be the diameter of the large hole for the bolt head, washer or T-nut.
Another problem is that, sometimes one drill is longer that the other and I have to change the table height that is very difficult to return to the same “center” position on my cheap Drill stand.
So, that’s what I did…