November 25, 2024
Description
I wanted a drill guide that was closer to a drill press, in that it had a solid base that could be clamped down to a workbench for use. I saw a bunch of really complex versions with hand cranks, etc, and I didn't have the time or patience to deal with them.
The model consists of a base, a pair of 20mm wide extrusions, and a gantry that slides up and down while supporting the DeWalt cordless drill. The central hole has a slight taper to force the drill to “wedge in” and not move. For that reason, I added a chamfer to the top face so you can tell which side goes up.
The baseplate has a ¼ in hole in the center as well as centering grooves that are 1mm deep. (I also threw an N for Nikhil on there since I was rather proud of myself.) If you want a bigger or smaller hole, you can just Boolean cut with cylinders in PrusaSlicer. I have included two lengths of the extrusions for added stability when you don't need a lot of vertical travel but remember to account for your drill bit and chuck length.
I advise printing in a strong material and using around 15% infill. I used grid, and the end result is very sturdy. For the gantry and baseplate, I highly recommend 4 perimeters to guarantee structural rigidity.
The baseplate and gantry are designed with a 0.1mm clearance in the extrusion sockets (they are 20.1 mm square vs the 20.0 mm square extrusions). If your printer or filament lacks dimensional precision, you may need to print a small test section of the extrusion and scale accordingly. You may need to rub a little paste wax on the rods to allow the gantry to slide smoothly.
License:
Creative Commons — Attribution — Share Alike
9
Nikhil S.
