[TMC] PAL-350 blower

[Richard Knoppow]

    I wonder if the new bearings are good. A very long time ago I 
used to rebuild tape recorders. I used Georg Mueller bearings. 
They were recommended by Studer and I found them to be the 
smoothest of all. From a quick google search they are still 
available. I had problems with SKF and others that ran rough, 
could be detected on the flutter tests. Make a simple test on 
your new bearings, just pinch the center with your fingers and 
spin the bearing. If you can feel any sort of roughness you need 
some other bearing. Don't assume the bearings are good because 
they are new. Also, they should be exactly on axis with the 
shafts and both bearings and shafts must fit snugly. Rumbling is 
typical of worn or galled bearings.
    It also possible the rumble is due to the motor "hunting" but 
only certain kinds of motors do this so it may not be relevant to 
yours.

On 7/16/2019 11:51 AM, Robert Nickels wrote:
> Well I replaced the bearings but I'm still not happy with the 
> blower - it still has a rumbling rattly sound.  Maybe my 
> expectations are too high, I'm going to live with it for now.
> 
> But since my gear pullers were too large for the job I thought 
> some others working on similar motors might be interested in my 
> 15 minute, almost-free improvised solution for removing the old 
> bearings: http://tinyurl.com/y55chh9o
> 
> 73, Bob W9RAN
> 
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL