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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.
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Did you see this ? Countersink Drill Bit making
There are nice wood knobs in this my diy project. In this video I m making wooden knobs for use in subsequent projects. I did it using 18mm plywood but you can use differ
Do you want to cut exactly 90 degrees or 45 degrees with your table saw? Moreover, you can easily do this with a miter gauge.