Drill Abrasive Drum

thingiverse

Drum to assemble strips of sandpaper. I've designed two drum models: 60 mm long x 50 mm in diameter, using 205x60 sandpaper strips. You can use standard roll paper 120 mm wide and cut it in half. 56 mm long x 66.8 mm in diameter, for sheets of standard size paper (280x230), cut into 5 strips of 56x230 (see Figure 6). They are tested up to 3000 rpm, which is the maximum of my drill, with no problems. Necessary material (Image 1): Printed drum and jaw. M8 screw, hexagonal head, 100 mm long. M8 nut. Lock washer for M8 to prevent loosening of the nut. 1.5 mm diameter wire Drum mounting: Insert the jaw into the corresponding hole in the drum, aligning the hole of the jaw with that of the drum. Insert the screw so that the head is fitted into the hexagon. Bend the wire at 90º angle leaving 6 mm on the short side and 58 or 54 mm on the longest, depending on the drum we are mounting. Insert the wire as shown in Figure 2 Insert the washer and nut. Mounting the sandpaper on the drum: Make a curve at 20 mm from one end, leaving the abrasive out. Place it on the drum as shown in Figure 3 and push down. Squeeze the sandpaper tightly around the drum. Rotate the jaw to hold the sandpaper (Image 5). Tighten the jaw by pushing with a screwdriver as shown in Figure 4. Notes: The radius of the screw hole and the circumference of the hex head are designed to adjust with very little tolerance to avoid vibrations. To cut the sandpaper, use a metal ruler and a cutter on the paper/fabric part, cutting it superficially (if you try to cut completely, you will lose the edge). Fold the paper by the mark and finish cutting by hand. In version 1.1, the diameter of the screw hole has been reduced in 0.2 mm for a better fit. Printer Settings: Printer Brand: Prusa Printer: Prusa Steel Rafts: No Supports: Yes Resolution: 0.4mm hotend - 0.2mm layer height Infill: 40% Notes: Print in ABS, 3.2mm wall thickness How I Designed This: I used FreeCad and Cura 2.4.0 Beta to design this project.