Dewalt 660 Chuck Suction Knob

thingiverse

<H1>Replacement Chuck Knob for Dewalt 660</H1> <H2>UPDATE 2019-04-26:</H2> I've been using it for months now, but just noticed that I designed it to spin in the wrong direction. Now mirrored, printed, tested, and re-uploaded, this new version seems to work fine originally, but provides a little more suction and avoids dust buildup better. <H2>Easier to use</H2> The chuck knob on the Dewalt 660 may be okay for tool-less changes when used as a hand tool, but I found it awkward to use when mounted into the MPCNC. This knob eliminates the button from the original knob, making it easier to tighten and loosen. It also spins with the chuck, so probably not a good idea for handheld use. <H2>Chip clearing fan</H2> The knob integrates a suction fan that clears chips from the tool cutter. Several iterations were needed to get a shape that worked well and wasn't prone to chip buildup. I originally tried to create a blower, but the shape didn't lend itself to that air flow direction. A radial suction fan works much better and does a great job of clearing chips from the tool path in my testing. You can't hear it over the Dewalt 660, and I was worried that it might scream, but you can't tell the difference with or without it. It blows the chips well clear of the machine. Mine is inside an enclosure, and most chips hit the walls and fall down, accumulating along them.