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In this video, I make an adjustable drill bit. I start by using the metal I cut from the M12 bolt. Then I am cutting a Spade Drill Bit. Then I combine the two.
Making Video :
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Did you see this ? Countersink Drill Bit making
I made a new drill press for myself. You can see how I build it in this video. It is a very beautiful column drill. You can download a dimension PDF
In this video, I am making a pocket hole jig. I made a scrap of hard wood. It was a great jig. You should watch this video to learn how to make a kreg jig.