2-part, reinforced Makedo Screwdriver

thingiverse

UPDATE: Changed design to reinforce tool shaft strength by printing shaft in a direction parallel to the torque applied when using the tool. The old design would commonly break because the printing planes were perpendicular to the torque (or in line with the applied force). Also taking advantage of the entire recess on the Makedo screws by using a hex inner and outer perimeter on the tool head rather than the previous cylindrical outer perimeter. New design is offered as a combination file and as separate pieces in case you would like to use different print profiles (infill, layers, etc.) for the handle and the tool shaft. Based on another user's Makedo driver, original design could not handle torque without tearing. Other designs for reinforcement only added surface area to the problem area without reinforcing the root cause which was not enough internal support where the base handle meets the tool. It could be corrected with the original by adding more top surface layers but that still would not be as sturdy as this design modification. Prints screwdriver as two snugly fitting parts. I suggest manually tapering the end of the driver bit slightly with flush cutters after printing is completed to make insertion simpler. Then firm pressure of the bit against a firm surface should almost permanently join the two parts. This design mod reinforces the entire inserted length, 15 mm. Tinkered in TinkerCad, parts split and shaft extended then duplicated as a hole to create the insertion point in the handle.