OMT² Project - Hex Bits & Handles

by AhZou, published

OMT² Project - Hex Bits & Handles by AhZou Mar 4, 2016
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Interchangeable Handles and Toolheads
compatible with the standard 1/4" (6.35mm) Hex Bits & Handles

Take your good old screwdriver bit holder and use it with one of the OMT² toolheads and you have a new tool. Or you so desperatly need to tight that loose screw and you can't seem to found your bit holder, print one up ^^

Even better, you need a tool that doesn't exist, just make it using the guidelines listed below and your creation will be compatible with every OMT² tooolheads/handles AND every standard bit holders you can come upon...

Here I'll be listing all the parts made using the OMT/OMT2 tags





For your tool bit to be compatible with 1/4" Hex bit holders and/or OMT² handles, it needs to follow this guidelines :

  • It must be a 6 sided polygon

All dimensions are given "flat to flat" (Circumbscribed diameter)

Male (Plugs for tool bits)
heigth is always 5.5mm for tool bits

Tight : 1/4" (6.35mm) => radius : 3.175mm
Basic : 6.25mm => radius : 3.125mm
Loose : 6.15mm => radius : 3.075mm

Female (Sockets for handles)
depth is always 6mm for sockets

One size only : 6.70mm => radius : 3.35mm


What needs to be done

  • Redo all the tools and bits in parametric (openSCAD)
  • Create crazy/useless/funny tool bits


This project is the evolution of the (now discontinued) "Open Multi Tool" project. The main difference between the 2, is the ability to use all OMT² toolheads and handles with any 1/4" (6.35mm) Hex bits and handles that you probably have lying around and/or that you can found in any hardware shop around the world.

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