In my last instructable related to recycling old HDDs, I had designed a sander from a junked HDD for as little as $5. But, the old design had its limitations and i had got a lot of people writing to me about improving the design to increase its usefulness. You can find the old instructable here
The older HDD sander had its motor still attached to the HDD base, thus limiting its use. In this instructable, we're going to design a power tool using an old hard disk , which can not only do sanding, but also cutting, polishing(buffing) and it may also be equipped with a diamond blade to cut glass.
The HDD motors spin at a very high RPM, but do not have much torque,but once they get into full speed('bout 7200 RPM) it is enough for our grinding/ sanding/buffing etc. purposes.
WARNING: The HDD is not a plaything. The platters spin at a very high speed, making it easy for the sander to rub your finger raw. I am not responsible for any damage you do to yourself or to anyone else near you.
Step 1: Materials Needed
- A junked HDD(needs to spin up!!)
- ATX PSU
- A Wooden ruler
- Wires (single-core preferred)
- Zip Ties (VERY IMPORTANT)
A wooden ruler may be difficult to come across nowadays. So, a piece of wood with the same dimensions will also suffice.
Optional: (for more info. go to Step 7)
- Diamond-edged Blade
- Sand Paper
- A brushless ESC like the one here (Step 8, Part 2)
- Torx Screwdriver set
- Power Drill
- Soldering Iron
- Soldering hot plate(optional)