Nothing more than basic 3D printing and altering well commented variables to get desired size required
Technical Specifications and Assembly Instructions
I used Openscad for the model, Cura for the slicer, and Pronterface for the controller
Open the .SCAD file in Openscad, and adjust the given parameters to fit your needs. All units are in millimeters
Compile and render the file into a new .STL file
Open the .STL file in Cura
It will likely be vertical, so rotate the model 90 degrees so that it is on its "back"
In the support section of the left toolbar, select "support type" to "touching buildplate"
In the Expert Configurations, I suggest increasing the "Distance Z" to .20-.30 to allow the supports to be disconnected easier and leave less residue on the printed model
Choose speeds and layer thickness as ideal for your printer and desired strength
Save the Gcode and then load it into Pronterface and print away
When it is done printing, carefully snap off supprt structure
Use a metal or wood file to remove excess plastic from support residue
Fit handle over the end of your tool, and screw into place
Print Time Estimates
With .06mm thickness, ~16 hours depending on size
With .25mm thickness, ~4 hours depending on size
Assembly time Estimate
10 minutes
((Note that a handle like this would be better suited for an implement with a shorter shaft, this was just the only shovel like that we had around the house I could put a handle on))
The benefit is not so much in cost savings, although they are there, but the fact that this can be made to easily fit any and all shovel/hoe/tools with long wooden shafts where this would be desired on the end and the ability for a village to make them themselves instead of needing them delivered from some large manufacturing facility
