ratcheting mini screwdriver

I was told that it'd be impossible to fit a ratchet mechanism inside a tiny screwdriver, let alone hold more than a single bit. This is to prove that person wrong ;)

also check out the Print-In-Place version

A reversible ratchet mechanism didn't fit the budget so I opted for the big brain move of simply reversing the screwdriver. Yes there's another receptacle in the back ;)

• fits 4x28mm bits such as the iFixit ones
• 30° ratchet with clockwise and CCW socket
• freely rotating end cap 
• optional keychain attachment point in end-cap
• optional keychain front-cap with tight pressfit
• print in one go (dual color too)

The low budget LTT screwdriver look or any other dual color look for that matter, can be achieved by a simple filament swap at the 2mm mark.
Print time is under 1h and total cost in Prusament is <40ct which means its only 1/100th of the shipping cost of a real LTT screwdriver to europe 💀💀💀

Print everything in one go .3mm layer height and .5mm extrusion width (Prusa .3 draft settings). No supports. 57min for just the screwdriver + 18min for the optional cap
PETG is the way to go but PLA works too but creeps and I haven't done any long term study on how the compliant springs hold up.

Assembly is dead simple thanks to the 5 piece assembly

1. axle through main-body
2. ratchet onto axle (check orientation)
3. free spinning cap onto axle
4. rear socket onto axle (press hard)

should the tolerance for the rear socket be too tight, fear not I added some variations that are a bit more loosey goosey.

STEP included in case you want to improve the ratchet mechanism or you have a better idea on how to attach a keychain.

0.3mm layer height & 0.5mm extrusion width

otherwise its gonna be wonky