Portable HDD Grinder

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Introduction: Portable HDD Grinder

Guys those who interested to make a simple grinder for small scale use can try this....
All you need is an old HDD, can be easily get from a computer shop.

Step 1: Parts Required

1. Old HDD 
2. 230Ac - 12v, 2A circuit board (you can also use 12v,2A step down transformer or SMPS)
3. Emery Sheet
4. Push button type micro switch
5. SPST switch

Step 2:

Open the HDD & remove front cover,actuator & magnetic disc.

Step 3:

Now take the magnetic disc, cut same size of emery sheet & stick it on the disc.

Step 4:

Place the hdd & circuit board on a plastic box.
attach the push button switch & spst swich on the side of box.

Step 5:

HDD has a tendency that when there is no usage the spindle will automatically turn off. So to get a continues spindle rotation just short "reset & ground" pins on the ide port. To identify the pins look at the picture.
Connections from these pins are given to push button & SPST switch

Step 6:

Mount all parts on a plastic box & give connections.

Step 7: Now Your HDD Grinder Is Ready..

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    user

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    10 Comments

    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 ?


    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 ?


    user

    Can this be done on a SATA HDD as well?

    2 replies

    yup...But i'm not sure it will give a continues rotation. If you have Seagate sata HDD then it works. it doesn't have power consumption mode, so you can get continues rotation.

    I have a Seagate SATA HDD which stops after 24 secs, do you know a way to keep it spinning? Thanks!

    I've tried this on an old drive (It had an old ESDI interface). I atached a fan, and once it got the power conector on, it would go full throtle.

    But it would run hot and then some kind of embeebed termal protection would shut it down!! But for 40 seconds or so.... what a draft!!!:D

    Thansk for the instr.

    short "reset & ground" doesn't work for WD drives (I have caviar22500, WD400), spindle even don't starts with jumper. Do you know how to fix it?

    1 reply

    Are you shorted the correct pins ? When you giving supply is it start for a second or not ?

    Would you kindly put a note in your ible to warn people of the possible danger of a grinder that makes thousands of rotations per minute?
    For example if too much pressure is used or damage occurs, the disk may explode and send shrapnel in many directions. Maiming and possibly killing people, pets or plants.

    1 reply

    Yes, you are right. I thought that those who making these kind of thing they have the awareness of spindle rotates in high rpm etc.But there is no chance of exploding the disc, when too much pressure apply it simply stop.