Hai every one
  Is any one in search of making brushless dc motor here is the link
http://homepages.enterprise.net/jayjay/cdrom_motors.htm

I built mine back in 2005 when it was a craze & branded brushless motors were hell expensive with a very few Chinese manufacturer made these motors at that time. Please see the pics of my CD Rom brushless i built 5 years back & yes i paid $60 for a motor controller at that time.. complete hand wound copper wire built from scratch.

7 or 8 months back I bought an old LG cd rom to make a brushless one like this.I was not able to open the bell of the motor so kept tat in my shelf.

How much thrust can these produce?

HAI,
Rajath
Thrust not only relates with rpm of bldc it also relates with which propeller u r using its pitch .there is a detail some were in this link http://www.bavaria-direct.co.za/models/faq.htm that u can increase the rpm by reducing the no of windings and increase torque by increaseing windings.one thing is sure that these BLDC motor r light weight and can produce enough rpm and thrust to make things fly.for understanding the basic of propeller go to this link http://www.rc-airplane-world.com/propeller-size.html

Hai Sharlock,
   From where did u get the magnets

Its Vijeesh Everyone
         Does any one know where i can get the magnets for BLDC motor in kerala ernakulam.

Quote from: vijeeshkumar on January 14, 2011, 10:26:48 AM
Hai Sharlock,
    From where did u get the magnets

I had imported the magnets from the US at that time.

hai Friend..its too easy to make a powerful brushless motor from an scraped CPU fan, and you only need a simple circuit, with IC 555, along with CD 4020, with 4, or 6 MJE , or TIP 3055, or BD 679 transistors, to power it, and a little rewoks on coil..then WROOOMMMMM....can adjust the speed, can brake and reverse...so i will post a detailed article here , its too simple, effective and only drops MA in work...but poerfull and high RPM...soon with video...now i am in a little bussy...will be with you...a motor from an old VCR also great...but because of its size a gyroscopic effect may occur in aero models...

Hai rathikumar can u give me the circuit diagram .The cpu fan is dc motor isn't it,it had got only 2 wires.

CPU fan is a brushless motor.. The speed controller is built into it so there are only 2 wires coming out for the power supply.. Anyway can somebody give some details on how this is done? I have some old drives lying around..

Quote from: vijeeshkumar on January 14, 2011, 10:29:14 AM
Its Vijeesh Everyone
          Does any one know where i can get the magnets for BLDC motor in kerala ernakulam.

One of the source for Strong magnets is the CD Rom itself. In the lens assy you can find 2nos of Strong magnets.
Try to use them. I have not tried myself but feel that there power will be enough for converting the CD Rom Motor to RC Motor. Drawback is that you need many CD Roms. You can get 2 Magnets per CD Rom.

Best of Luck
Vivek Kumar Singh
www.rcelectro.com

Best way is buy a new brushless motor rather than making one, better performance..

Its OK in buying but the fun and thrill of making will be lost. In RC it is Fun and thrill which keeps us intact with the hobby.

Hello Rathi, I have many CPU fans lying. Please post the Circuit. And since you seem to have done RND's then tell me wheter it is possible to make EDF using those fans.

Abhay

hi Abhay,tat person is no more active in this forum..

excellent idea considering cd rom drive motors are available for about 25 rupees in delhi's electronics markets how much speed / torque would this thing pull ?

Quote from: viksi on April 10, 2011, 01:56:51 AM
excellent idea considering cd rom drive motors are available for about 25 rupees in delhi's electronics markets how much speed / torque would this thing pull ?

can you buy 4 pcs and send it to me ? I shall PM you my address then...

hello
I am doing with hdd motor .Now i need to now what the maximum voltage & am that i can apply to it
it's seagate 40gb -6383 CYL-63 SECT
from that which speed controller has to be choose 

can anyone help me?

You may consider rewinding the stator to match your needs.
How much poles is that stator, and How many magnets in stock rotor ?

Quote from: abhijith s s on January 03, 2015, 08:40:34 PM
hello
I am doing with hdd motor .Now i need to now what the maximum voltage & am that i can apply to it
it's seagate 40gb -6383 CYL-63 SECT
from that which speed controller has to be choose  

can anyone help me?

My 20A ESC doing well on this, but still can produce only low thrust with its stock winding.