Hard Drive Technologies

Reviews, Guides, Tips and Recovery of Hard Disk Drive Data

HARD DRIVE (HDD) Diamond Grinder Conversion

February 14, 2017 Jon 12 Comments

Don’t throw away old or broken desktop hard drives! Instead, convert them into a very nice, variable speed, diamond grinding tool for metal (sharpening tools) or stone. In this how to video, I’ll explain exactly how it’s done, and demonstrate how well it works. Enjoy!

*Link to the 555 drive circuit:

RC Servo Tester with 555 IC

**If you don’t want to make the 555 drive circuit, then you can buy a servo tester for little money at the link below.

*Link to ESC(Only .30 if ordered from China & .45 if ordered from the US):

**Package deal for both shown above: http://bit.ly/2kySjTz

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  1. FEMA Region 9
    February 14, 2017 - 9:34 pm

    I like your videos, you pay attention to detail and give good explanations in layman's terms for people like me who are learning. Question, is this speed controller essentially a high current pulse-width modulator? I want to find out if I can use something like this for high current LEDs for dimming. Thanks again!

  2. robfel68
    February 14, 2017 - 9:49 pm

    Could you please post a link where you ordered that grinding Diamond Disc. Thanks for the awsome videos.

  3. pei broker
    February 14, 2017 - 10:21 pm

    thanks …

  4. electronicsNmore
    February 14, 2017 - 10:47 pm

    Correction: The 3 phase motor is making the "Beeping" noise due to pulses from the ESC. The ESC is not beeping. If you have a 4 wire hard drive(which is 3 phase Star/Wye), then you need to identify which terminal is the "common" terminal for the 3 windings. Once identified, don't use the common terminal, only the other 3.

  5. Robonza
    February 14, 2017 - 10:53 pm

    The ESC beeping normally comes from the motor via a bit of modulation, adding a beeper to the ESC would make them more expensive. See if it still beeps with no motor plugged in?

  6. Tooterr102 E.
    February 14, 2017 - 11:25 pm

    Another well explained thumbs up video. Thank you

  7. Bobby Tectalabyss
    February 15, 2017 - 12:21 am

    Hi Doug. Awesome use for an old hard drive ! If you get a chance take a look at a drill doctor,it may give you an ideal on how to make a jig for drill bits. Just a thought. And thank you has always for sharing.
    All my best.

  8. bazrazin1
    February 15, 2017 - 12:51 am

    can you show a way to drive the printer bipolar 4 wire 2 winding stepper motor, i've a couple of them lying around.

  9. Edmorbus
    February 15, 2017 - 1:46 am

    Thanks for sharing : )

  10. RapiBurrito
    February 15, 2017 - 1:56 am

    You are right in saying that it doesn't matter where you connect the wires, since its an AC motor in delta configuration(most likely), however, some viewers might find their hdd has four terminals, in that case you have a Y configuration AC motor. In that case it might be important to get your connections right. Using a multimeter on the ohms setting measure all the points to one another, you will find that some show more resistance than others use this info to find your center tap and use the right driver. I made my own driver some time ago but needless to say, it's a lot of trouble that a single chip prettymuch solves. Thanks for the video!

  11. Abel Fesshazion
    February 15, 2017 - 2:20 am

    Also I can do this with laptop hard drives?? I have about 20 old ones made from the early 2000s really low storage about 5gb average lol.

  12. Abel Fesshazion
    February 15, 2017 - 3:04 am

    A practical project. No stupid s**t! 🙂 Btw are you an engineer?

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