Hello, here I show a new version of my mini drill press, specially designed for PCB, but may be useful both for drilling and sanding or polishing, etc..
The operating principle is simple, on two guides slides (drawer type) put the basis for the drill.
The movement of these guides is achieved using a lever, retained by a spring. The movement of this lever rotates a gear (made by me, wood), which meshes with a rack attached to the drill holder.
In this case, since I have several powerful DC motors, I thought it would be interesting to put one of these motors and drill a mandrel and have everything fixed.
The mandrel and the motor shaft are connected by the latter connected to a screw which in turn grasps the mandrel. All this together by an aluminum tube that allows a good grip.
So far it works pretty well, the engine is quiet.
To power the motor use an external source of 16v-1A, but I think it falls a little short, ideally with 24 Vdc feed. I put a toggle switch to control the ON-OFF.
Thanks for the visit