DIY Grinding Machine by HDD(hard Drive)





Introduction: DIY Grinding Machine by HDD(hard Drive)

Hello! This is my first Instructable, and English isn't my first language(I'm from Taiwan(R.O.C)!!!). So please give me some comments to tell me how to make it better. Thanks!!!

The progress is pretty simple, but the product is really amazing.

Material: HDD, sand paper(roughness depands on what kinds of grinding you want), double-side tape

Step 1: Disassemble the HDD

You have to take the read/write head, magnet off. What's left is the case, major motor, disk, control circuit .

Step 2: Placing the Sand Paper

Cut the sand paper into the matching size of the disk(mine is 3.7"), and one on top.

Then stick it on the disk by double-side tape

***The tape must be put balanced well, or when it turns in the high speed, the motor may be damaged or the sand paper may fly out***

Step 3: Protecting Shield (Optional)

The shield is used to protect things from flying out and hit you.

I made it by two aluminium sheet from two soda cans.

Step 4: Power It

You can simply power it by the PSU from computer.Or make a control circuit by your own.(There are many good ones in Instructables)


Thank you for your reading!

5 People Made This Project!


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hey thats cool, but when i tried to build it i had to let half of the litle arm inside the case, becuse if i wantetd tu unplug it the HDD stoped turning all 10 seconds can someone help me ?

You can try to trick the controller by shorting some of the RW head connectors, but that only works in rare cases (and can burn up the controller in other cases).

You can also try what I eventually did, and work above the RW head (so you don't need to touch it), by adding an extra platter on top of the existing assembly. In larger disks there's easily enough room for it on the spindle.

I have a dead TOSHIBA HDD 170 GB with two platters, the problems is it has two transducers (R/W) making it impossible to put another extra platter, can you tell more about the details about tricking the controller? Thank you in advance

It's been a while since you posted this but I'll give it a shot anyway-

I'm not disputing that the 3.5 inch HDDs don't need/use the 12v rail, reading your other comments you obviously know your tech. My question though, is if it is pretty much there just to be backward compatible or to adhere to the Molex standard, why are all (at least all I know of) external 3.5" HDD enclosures powered by 12v wall warts? Couldn't they theoretically run from a 5v PSU like the their 2.5" cousins?

Didn't understand the 12v wall wart hack mentioned in the comments. Mine just twitches, no constant rotation.

Congratulations, I really like the idea that you came out with, I have a question doesn't the double sided tape come
Off due to heat generated by sanding or grindin?

I've never thing it this problem. Although it may happen, the chance might be low since it is hard for the heat to transmit through sand paper and it's not so easy for the whole double sided tape to fail. However, to make it safer,I think it should be cooled down after using.

Thanks for your good question!

I think because the tape is evenly distributed and forces are basically in equilibrium because of speed and balanced, the tape probably stays put except under extreme conditions where the drive would stall or nearly so.

Brilliant, brilliant brilliant. I just inherited about 30 junked HD's, and this is GREAT!!!!!!! Going to put one together tonight.