Ball-Bearing Ratchet Screwdriver

This 3d-printable ratchet screwdriver is very strong, as it uses metal 4.5mm airgun BB's instead of plastic catches. The mechanism turns freely forward, locks solid backwards, see the video. It has a 1/4" hex in the axle for screwdriver bits. You could also use it as an overrunning clutch.

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[PARENTDIR] Parent Directory - [TXT] util.scad 2017-09-12 19:53 8.8K [   ] spragg6.stl 2016-02-23 09:21 1.1M Complete Parts, 6-ball Version [   ] spragg6.scad 2016-02-23 09:21 2.1K Source code, needs util.scad [   ] spragg6-hub.stl 2016-02-23 09:21 668K 6-ball Hub Only [   ] spragg5.scad 2016-02-23 09:21 2.1K Source code, needs util.scad [   ] spragg5-hub.stl 2016-02-23 09:21 485K 4-ball Hub Only [   ] spragg5-hub-nospring.stl 2016-02-23 09:21 428K [   ] spragg5-fixed.stl 2016-02-23 09:21 840K Complete Parts, 4-ball Version [DIR] images/ 2017-01-10 19:04 - Image Pile

Instructions

It prints in 3 pieces - the axle and two halves of the case. Fit the six BB's into the axle as you slide it into the casing, then glue on the lid.