Countersink Tool Made from Surplus Junk



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I was working on a drill chuck for my mill, and I ran across a Jacobs 3/8″ keyless chuck that I pulled off a power drill that leaked it’s Magic Smoke. The chuck was the only thing salvageable from the drill, and I tossed it in the chuck drawer for a future project.





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Well, heres the 2nd half of the project that I ran across in my parts washer while cleaning up the other drill chuck. I pulled three of these out of the dumpster at work, and have been wondering what I was going to use a 1/2″ spinner for. I’m always wanting a fast countersinking tool to deburr holes on different things. I’ve never seen one like this for sale, and thought maybe I’d make one.


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First thing to do is to whip out the Milwaukee portable band saw, and shorten the spinner. this left me with a shaft that was about 1/2″, which was much larger than I needed for the 3/8″ X 24 TPI chuck I needed to mount on it. The shape of the spinner is pretty odd, so mounting it to a lathe or mill would be a headache and I just ran it across my belt grinder, and reduced the shaft enough so that I could thread it with a die by hand.


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Pretty short threads, as the chuck doesn’t need alot. This is going to be a low speed, low torque kind of tool.


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A little thread locker should hold it in place in just about any situation I am likely to get into with this tool.


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And thats it. The whole procedure took about ten minutes, and cost exactly nothing. This is one of the advantages to hoarding broken parts and worn out tools. I have a short countersinking tool that will be just the thing to quickly take the edge off freshly drilled holes in any situation, and I can quickly chance CS tools without a chuck key. Good deal!

Please have a look at the and let provide your special maintenance and tool needs..

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