If you need to drill metal in tight places, the magnetic drill press, or mag drill is your BFF. The idea here is that a drill press with an electromagnetic base can go anywhere, and even drill horizontally if need be. If you don’t need to use one often, but want one anyway, why not build one out of e-waste?
[DIY KING 00] built this mag drill starting with the motor from a hoverboard. While these three-phase brushless motors have a lot of torque to offer reuse projects like this, they’re not designed to be particularly fast.
He was able to make it about three times faster by cutting the windings apart and reconnecting them in parallel instead of series. He designed a simple PCB to neatly tie all the connections back together and added an electronic speed control (ESC) from an R/C car.
Reluctant to give up the crown, he made his own three-coil electromagnetic base, using a drill to wind magnet wire around temporary chuck-able cores. The coils are then potted in epoxy to keep out dust and drilling debris. Everything runs from two large LiPo batteries, and he can get about 15 minutes of high-torque drilling done before they’re dead. Can you feel the electromagnet pulling you past the break to check out the build and demo video?
Depending on what you’re doing, you might get away with a magnetic vise instead.
11 thoughts on “Hoverboard Grows Up, Becomes Magnetic Drill Press”
I have a real Mag drill. But I once used it as an expedient “Magnabend” to make a servo drive case.
Sketchy as frig, I love it.
Were you at least using something on top of that trepanation drill to protect it?
Apart from using two fingers to hold a piece of steel plate being drilled and not backing off the tap enough, it’s a great build, well done. Where I am these magnetic drill presses are ridiculously expensive for some unknown reason.
Yeah, holding a piece of metal on the drill press just like that is how i lost the end of my finger at the knuckle when I was 18 and knew it all. Good times. Now I just tell people I’m Yakuza :D
Did he really super glue the drill chunk to the motor? And how did he manage to get it centred? The video looks like he is just drilling some mounting holes at hand-measured positions and now there is no visible run out? Did I miss something?
Looks a bit naff. That’s not engineering, it’s bodging and very potentially wasting time and money.
Not sure how he aligned things to remove run out, but he clearly welded the chuck to the motor using the superglue as a temporary holding measure. I’m not sure the welding is much better mind…
I liked the phase adapter board for changing the motor Kv, thats pretty nifty
Please always put “Hoverboard” in quotes to properly distinguish it from a board that actually, y’know, hovers.
No protective gear, no respect.
can you give me the wiring diagram you made on the engine?
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