This screwdriver is designed to have an extendable shaft, allowing users to reach screws in difficult places without needed to put in an addition extension. The extendible drive shaft is placed inside the body of the screwdriver and passes through a double ratchet (for strength). and connects to a drive bit on the top end. The extension adds roughly 4 inches in reach. Additionally, given the length of the drive shaft, the shaft has the ability to flex slightly, which helps tremendously in situations where an object blocks the screwdriver from attacking a screwhead head on. The main body of the screwdriver is beefy for extra torque.

This screwdriver is my first real attempt at making anything mechanical. There will surely be a v.2 with improvements. Your feedback is welcome.

Material: PLA or ABS. ABS/ASA is recommended for durability.
Infill: drive shaft and bit housing 100%, remainder of model 30% or above. The uploaded .3mf file has part parameters set to these settings.
Supports: no
Brim: auto

Wall loops: 3

Note 1: The body/rachet part must be laid ratchet side down. The ratchet blades/fins are a free-standing part and if the body is printed with the ratchet side on top, the print will fail.
Note 2: The bottom of the drive shaft may need to be glued to the bottom shaft stop. This is step 1 in the assembly process.
Note 3: At this time the ratchet mechanism is one-way. I'm working on a two-way version but that may take some time.
Note 4: In the slicer, be careful moving parts around. All of the square slots that the main drive shaft goes through are created using negative parts. If you move an object in your slicer, be sure that the negative part moves with it.
Note 5: Technically, if you want a longer drive shaft, you could perform a cut on the main body, extend the length of that cut, and extend the length of the drive shaft.


Assembly:

1. Place driveshaft (#2 on diagram) into square receptacle onto shaft stop (#1) Note: It is recommended to superglue these two parts together.

2. Insert shaft (#1, #2) through the main housing (#3), up and through both ratchet square slots.

3. Insert shaft (#1, #2) through the ratchet cover (#4).

4. Insert shaft into bit housing (#5).

5. Screw on bottom cap (#6) into main housing (#3)