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Old 01-05-2022, 10:52 PM   #12
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Default Re: what to do with faulty hard drives?

Well, if it's not too late, I strongly recommend trying this out:

... image taken from this thread/post:

Believe it or not, I've been using the HDD "bench grinder" above fairly frequently. It's very useful for sharpening things like dull drill bits, chipped flat heat screwdrivers, and sharpening blades. Also used it to smooth out a few acrylic glass shims I was making for a CPU bracket riser. The current sandpaper I have on there is fairly rough and will eat wood and plastic / acrylic, and aluminum pretty quickly. I also have some finer sandpaper and was thinking to glue to another platter so that I can swap between different sandpaper grit when I need "finer" sharpening. But if you have multiple HDDs, you can just make multiple sanders, all with different sandpaper grit. The neat thing about this project is that you only need an ATX PSU and can literally move/use the HDD grinder anywhere.

On a side note, if you do build one, make sure you wear safety glasses when using it. I've had mine grab a small aluminum piece one time when I was not careful, and it shot it quite energetically across the room. The spinning mass of several metal platters @ 7200 RPM is not to be underestimated. While it won't have anywhere near the power of a real grinder, it can still be dangerous. Adding a flat "table" surface in front of the grinder should make it safer and is recommended... but I'm too lazy for that.

Originally Posted by petehall347 View Post
get the magnets out of them
That's another excellent use of old HDDs that don't have much value (e.g. low capacity HDDs, especially IDE/PATA.) Their magnets are pretty strong - great for extracting screws from deep holes in devices, finding lots screws (or other metal bits) on the floor or if fallen in a hard-to-reach place, and for magnetizing cheap screwdrivers that don't have magnetic bits.

Oh, and one more thing: rip the "voicecoil" on the hear arm. These usually have 5-10 Ohms resistance and are handy if you need a power resistor in that range. Just solder some wires to the ends and dump in a cup of water (distilled preferred, though not necessary.) That should make it able to handle at least 5-10 Watts continuously for a very long time... or at least until the water starts to bubble too much around the coils.

Or you can use the voicecoil as an electromagnet in a hobby project.

The platter motors can be fun too if you have a 3-phase brushless controller for an R/C car.

The PCB is a good source of SMD ceramic caps and resistors. Actually, on that note, if you have any old IDE WD drives in your dead stack, let me know. I'm looking for a particular motor driver controller for a dead 40 GB WD HDD.

Last edited by momaka; 01-05-2022 at 11:11 PM..
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