Info on Japan Servo KP39HM4-016

[Bit Bucket]

Hi, this is my first post!

During a recent trip to Tokyo, I found 10 Japan Servo KP39HM4-016 for just 12$, so I got them to my home in Italy hoping to use them in a robotic project.
The question is: may I use them for a small CNC table?
I don't have a datasheet, but searching the web I found:

- they come from old 5.25" floppy drive
- they are labeled Matsus hita
- US Patent 4,347,457
- DC 12V, 0.08A
- 3.6 deg/step
- 4 wires (bipolar?)
- I found even a picture! http://www.wakamatsu-net.com/cgibin/biz/62020009.jpg

Reading this GREAT forum, I am starting to think that my stepper are too small for a CNC.

Can someone let me know how can I experimentally search for the torque?
Can I improve the torque using a gear train or maybe a timing belt or a worm gear?

Please, note that I only need a small CNC (about the size of an A4 paper sheet of working space).
I'd like to mount on it my Dremel (or an extrusor like fab@home), and that I'll use it to: cut PCB tracks and component holes, mill polystyrene foam, cutting MDF max. 1/2 inch. thickness and maybe fiberglass sheets.

Thank you for any help and sorry for my bad English!

[One of Many]

Considering its native application, there is no where near enough torque to move an axis much greater than a floppy drive head with nil for resistance. Add to that some cutter pressure and I'd imagine all it will do is hum a few unfamiliar tunes. A better application is this Theremin that could make the tunes play something you know.

You may have already found this link.
Drivers for your motors

All this does is motor control a potentiometer.

DC