<VV> '65 Corvair heater "FAN" motor shaft keyed?

[J. R. Read]

Charlie,

The piece you are describing as having a "keyed hole" which fits the flat on 
the shaft from the motor is the same piece that I called the "metal center 
piece" and has ALSO been called the "hub".  It is a part of the fan or 
"squirrel cage".

Since (as you describe) it is "keyed" to the shaft from the motor, it is 
going to spin at the same speed as the motor.  However, since it is merely 
crimped to the REST of the squirrel cage, over time the crimp fails and 
allows the fan to move slower than the motor - creating the squeal that you 
hear emanating from the heater area.

EMs and LMs used the same motor and fan SFAIK.  Well, those with the 
"fresh?" air heater.

The plastic fans (I'm not sure if they are/were GM or aftermarket) are 
molded and do not have that crimped on center hub and will therefore spin at 
the same speed as the output shaft from the electric blower motor.  They 
don't seem to be easily available now.  This leaves you with finding a way 
to fix the one you have in some way to prevent the hub from spinning at the 
point of attachment to the fan itself.

It seems to me that applying lubricant is going to stop the squeal for a 
while, but the fan will likely not be spinning as fast as the motor - if at 
all.

Yes - you have circled to part of the fan that is the problem area.

Later, JR

----- Original Message ----- 
From: "Charlie via VirtualVairs" <virtualvairs at corvair.org>
To: "'Bryan Blackwell'" <bryan at skiblack.com>
Cc: "'Virtual Vairs'" <virtualvairs at corvair.org>
Sent: Monday, December 08, 2014 12:18 PM
Subject: Re: <VV> '65 Corvair heater "FAN" motor shaft keyed?


> JR had said "try to peg the fan to that metal center piece in some way so
> that it cannot slip."
>
> Is the "metal center piece" called the "hub"?
> Where is this "metal center piece" or "hub" - inside the motor, or part of
> the squirrel cage?
>
> Is the shaft (that inserts into the keyed hole in the "squirrel cage")
> crimped to the hub (inside the motor housing), and that what comes loose?
>
> See VV's linked pix below (if not attached) ~
>
> Can that be fixed and how?
>
> Thanks ~
> Charlie
>


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