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Picture of precise Micro drill-dremel in 5 minutes
Need something to drill tiny holes in your pcb, or maibe you just made primitive cnc which needs some simple but precise router?

here is the answer: this method allows to make perfect holder with precision about 0.1mm or better. without using any tools.


(this is my first instructable, i will edit it later)

Step 1: Stuff which you need

Stuff which you need:

1. Some small motor.
2. Epoxy resin or acrylic oxide(cures faster)
3. Syringe (size depends on motor axis and drill diameter)
4. drill bit which you want to attach to motor

Tools you will need:

something flat and sharp ( knife, screwdriver or anything else )
 
tutdude983 years ago
You can use cotton swab plastic to attach to motor
tilmen4 years ago
Very useful instructabe.What else can we use other than Epoxy resin or acrylic oxide? How can I find acrylic.
drill unfortunately drill oversize too and that is dangerous, always drill undersized or use a taper fit please i don't want to meet ya one day without an eye.
zorif6 years ago
did some similar long time ago. :-)
still need some improvements.

http://www.instructables.com/id/DIY-Pcb-Hand-Drilling-Machine/
Hmm if you covered it in epozy to give it strength you could make it so Dremel bits fit in it to use as a sander etc
stone34086 years ago
If you set the shaft against a file while it is running it will sharpen the shaft to a point. If you turn the motor on and place the sharpened tip against plastic it will melt from friction and make a perfect hole. I have always used the method with great success and once it get rolling it cuts well too. This setup allows for a great deal of side loading. The melting plastic will attach itself to the shaft making for easy clean up. I have had the most success doing this with hairdryer motors as rpms are very important with this method.
Just a thought - It doesnt matter how concentric your cutting bit is to the motor shaft if your motor shaft is supported by two tiny brass busings with no lubrication that offer minimal support, arent designed for any side load, and will wear out quick. You would be better off sticking a shaft in your dremel and following the instructable from there. 0.1mm is about 4 thou inch which isn't very precise at all.
Dremels are cumbersome at the best of times. The stylus would be an option. I like this project, even with its flaws. I would say it will last a reasonable amount of time if just drilling holes in PCB's.