Sorry, Microsoft munged that video link.

http://youtu.be/eq263AYgyYg

----------------------------------------
> From: lgtngstk@hotmail.com
> To: piclist@mit.edu
> Subject: RE: [OT]: CD/DVD spindle boss has free moving bearings
> Date: Thu, 5 Mar 2015 14:15:35 -0500
>
> Yes, they are for automatic balancing.
>
> <a href=3D"https&#58;&#47;&#47;www.youtube.com&#47;watch&#63;v&#61;eq263A=
YgyYg" target=3D"_blank" class=3D"newlyinsertedlink">https&#58;&#47;&#47;ww=
w.youtube.com&#47;watch&#63;v&#61;eq263AYgyYg</a>
>
> ----------------------------------------
>> Date: Fri, 6 Mar 2015 01:12:36 +0800
>> Subject: [OT]: CD/DVD spindle boss has free moving bearings
>> From: justin.richards@gmail.com
>> To: piclist@mit.edu
>>
>> I have noticed that CD/DVD drives make noises when starting/stopping.
>>
>> I had assumed it was simply motor noise but never quite satisfied with t=
hat.
>>
>> I have just dismantled the spindle boss(the bit the disk sits on then ha=
s
>> the magnetic clamp to hold in place) and discovered there are about 10
>> small bearing that are free to move about in a race and the source of th=
e
>> noise.
>>
>> I can only guess they are for balance.
>>
>> Anyone know how they work and if they are for balancing.
>>
>> Justin
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