Pump Hand Drill gift set for Grampa

thingiverse

this is a remix of **Speedy777 Pump Hand Drill** (http://www.thingiverse.com/thing:731086). it adds a box to hold the 3 different sizes drills, and the relative bits (diameter of 1.6, 2.4, 3.2 mm). it fits on a 10x10 bed we are also including the original drill body files from speedy777 and three separate files for the back nub, the slider and the chuck. in our experience, printing all the parts at 100% resulted in the slider to be way too tight and not move freely, the back-nub being too big and not clicking in and the chuck screw also to be a little on the small side. this is likely due to our printer low accuracy. in any case, 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% everything works great after some minimal sanding/filing we printed the shaft upright, at 100% infill with .3mm layers and 3 walls, with a 5mm brim for stability and we slowed down the print to 75% 2/3 up. it takes longer but it limits swaying and thus adds accuracy we printed the slider at .25 mm layer to avoid the layers to align, and thus ideally reduce friction.