Pump Hand Drill gift set for Grampa

thingiverse

This is a remix of Speedy777's Pump Hand Drill (http://www.thingiverse.com/thing:731086). It adds a box to hold three different sizes of drills and their relative bits, each with a diameter of 1.6, 2.4, or 3.2 mm. The design fits on a standard 10x10 bed. We are also including the original drill body files from Speedy777 along with separate files for the back nub, slider, and chuck. In our experience, printing all parts at 100% resulted in a tight slider that wouldn't move freely, a too-large back-nub that didn't click into place, and a small chuck screw. This issue is likely due to our printer's low accuracy. However, we found that printing the body of the drill at 100%, the slider at 109%, the backclip at 95%, and the chuck screw at 110% worked great after some minimal sanding or filing. We printed the shaft upright with 100% infill, .3mm layers, three walls, a 5mm brim for stability, and slowed down the print to 75% two-thirds up. This longer printing time limits swaying and adds accuracy. The slider was printed at .25mm layer thickness to avoid aligned layers and reduce friction.