Ratchet screwdriver with torque control #3DThursday #3DPrinting

22steve22 shares:

I designed this ratchet screwdriver to be adaptable for all 6-Kant 1/4 of inch bits.
The bit rotation is locked while unscrewing and for screwing the spring provides a torque control.
The maximum torque depends on the spring stiffness and on the length of the spacer.

To adjust the maximum torque for screwing I also included a M5 nut in the back of the handle that allows to increase the torque screwing on the back of the screwdriver a M5 bolt (This part is optional).

The ratchet is a single piece that have to be printed twice: one for the head of the screwdriver (have to be inserted in it) and one moving with the spring.

download the files on: http://www.thingiverse.com/thing:2152434

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