One hour CD ROM motor construction PART2 - Page 19 - RC Groups
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Jan 17, 2004, 05:12 PM
electron liberator
jaywatay's Avatar

I got some at Radio Shack. There was a pack of 3 spools with different gages. I can't remember what the gages are but all three were less than $5.

wire at RS

I actually looked up local stores online and called until I found one that had them in stock.

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Jan 17, 2004, 05:21 PM
Registered User
galloping gimp's Avatar
The three sizes of wire in the Radio Shack 3-pack are:

#22 = 0.0254" = 0.64516mm, 40 feet
#26 = 0.0159" = 0.40386mm, 75 feet
#30 = 0.01" = 0.254mm, 200 feet

Catalog #: 278-1345

Another source for magnet wire might be electric motor repair shops. There are still a few of these around.

- Jeff
Last edited by galloping gimp; Jan 17, 2004 at 05:25 PM.
Jan 18, 2004, 10:49 AM
Registered User
Where do you find the .32mm wire? Like a radio shack or something?

Jan 18, 2004, 11:02 AM
Registered User
I get mine in bulk at a electronics supply store. 1 cent a foot.
Look in the phone book all cities have one!
Well if your not in nowhere land.
Jan 18, 2004, 11:24 AM
Registered User
Carr-McMasters have many sizes of magnet wire reasonably
priced, but maybe larger quantities than needed for one or two motors. They have many other useable model supplies. Metric
nuts and bolts etc. Cecil
Jan 18, 2004, 11:24 AM
Registered User
How about a cd-rom? This is just a few of a very large batch we found. and are happy campers now:
this is 100 sitting here and we need to go and get the rest. Another 100 Bought 20 for samples a few day before and also already had 20-30 on hand that I was working with.
I can't wait for the factory to start sending us our new finnished motors tearing these apart and doing a re-build on them is a pain!
Jan 18, 2004, 11:42 AM
Registered User
Where did you get those from? I'll buy a few from you?
Jan 18, 2004, 11:47 AM
Registered User
Oooops , memory not toooo good. Its McMaster-Carr, Cecil
Jan 18, 2004, 12:04 PM
E-Flight Addict
ronin8451's Avatar
That little one wasn't from a Mitsumi drive or something like that was it? I pulled one yesterday that was all enclosed and looked like a coreless motor until I pried the outer case loose and looked inside.

I went to a local computer surplus with the "list" someone posted in excel format and found :
4pcs. Toshiba 5702B 24mm stator ball bearing cd-rom drives
1pc. Teac cd-55a 20mm stator ball bearing cd-rom drive (small little bugger, this drive is easy to find because it is a half-height drive with a full size faceplate)
4pcs. various non bearing drives good for 20mm cores
4pcs. Mitsumi crmc-fxoo1d for bearing donors
I lucked out and they had a buy one @ full price next is 50% off sale so my total haul was $15 !! I have a lot of machining to do making mounts for these buggers.
Jan 18, 2004, 12:12 PM
Registered User
Originally posted by ronin8451
That little one wasn't from a Mitsumi drive or something like that was it? I pulled one yesterday that was all enclosed and looked like a coreless motor until I pried the outer case loose and looked inside.

I wasn't paying close attention to the label on the drive, but I think Mitsumi may be right. This one was also enclosed, and at first I thought it was just a cheapie brushed motor until I popped the lid from the enclosure.

Jan 18, 2004, 12:15 PM
Hi Wattage Electrics - Cool
Rad Racer's Avatar
"Where did you get those from? I'll buy a few from you?"

Napolean B.,

I worked a deal with an electronic salvage company, purchasing them by the pound...which comes out to about $1.40 per drive.

They were reluctent at first, but after assuring them I would recycle the remains....(we have a recycle program where I work) they agreed to the deal.

I got 40 drives at the flick of a finger.

hope this helps,
Jan 18, 2004, 06:36 PM
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soundman's Avatar
I'm going to attempt my first motor soon. I think I've grasped an understanding of everything involved - I have one question though.

Some people have been double winding.....what effect does double (or more) winding have, examples:

a 30 turn single wind motor vs a 30 turn double wind motor.

a 30 turn single wind motor vs a 15 turn double wind motor.

I know that wire thickness would be different & cause changes in itself - but can someone have a go at explaining it in this simplistic way assuming that all other variables stay constant.


Jan 18, 2004, 09:56 PM
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DNA's Avatar
Jan 19, 2004, 12:06 AM
Foam Flyer
Depdog's Avatar
O.k. so after HOURS of reading this stuff. For a geared motor, use the Star winding, for a direct drive motor the Delta winding is better? (I know this is a big generalazation SP) but am I pretty much on the money.

My darn eyeballs hurt from reading and my fingers hurt from winding. To test your winds, after each set of 3 are wound, check with a multimeter for Ohms, or Continuity. Then check Ohms or Continuity between the leads (one at a time) and the stator. There should be none between the stator and the leads.

Then after the next set of 3 are wound, check just like before, but then check between the new set of leads and the first set of leads.

Finally repeat all this with the 3rd and final set of winds. If everything is right, you should have continuity between each end of the same lead, but not to the stator, or any of the other leads. If all that checks out o.k. then you choose your connection pattern (Star or Delta) and then connect your esc for power testing.

Am I right on all this?

Jan 19, 2004, 12:16 AM
Registered User

These any good?


I had three old cd drives on hand and decided to have a go at doing these brushless motors. Looks interesting...

I'll attach a picture. Two of these are panasonic, one is sony. panasonic's are ball bearing sony is not. What do you think? are these suitable? or would I be better off just buying a better motor to start with? Appreciate the thread and your advise... Thanks, Jeff

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