Turn your junk hard disk into a tool grinder!
note: this not my original idea, this was already featured here in Instructables before.
I just want to submit my own version. I also found out not all Hard disk can be converted to a grinder, some won't spin when you rip out the read/write head, while others, motor are too weak and stop spinning when load is applied.
So far, i discovered that a Seagate Barracuda 3.5 inch desktop hard disk has a strong motor and spins at 7200 rpm. I used the 20GB and 40GB model..
Just follow my pictorial instructable here if you plan to make your own.
1, torx screw drivers set
2. Phillips screw driver
3. sharp x-acto knife
4. pliers if needed
5. clear goggles - for eye protection
1. Old Seagate Barracuda hard disk drive
2. Different Grit water proof sand paper (floor sander paper recommended)
3. Power supply - 5volts/12 volts, the one used for external drive.
Thanks for Looking...