[TCML] Re: Tesla Digest, Vol 69, Issue 27

[Russell L Thornton <Russell.L.Thornton@xxxxxxxx>]

David,
I suggest you first search the machinist forums and then if you can't get 
an answer pose the question to them.  It happens that there is a very 
popular practice of using treadmill motors to run lathes and mills giving 
them continuously variable speeds.  don't forget the Yahoo groups.

Russell at the Cape

Message: 4
Date: Tue, 30 Jul 2013 18:40:07 -0700 (PDT)
From: David Rieben <drieben@xxxxxxx>
Subject: [TCML] Flywheel Pulley on Treadmill Motor
To: "tesla@xxxxxxxxxx" <tesla@xxxxxxxxxx>
Message-ID:
 <1375234807.8452.YahooMailNeo@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Content-Type: text/plain; charset=iso-8859-1

Hi all,
 
I was hoping that I could dip into the collective knowledge of this group 
on my inquiry, as I've never
dealt with this before. I have an old treadmill that finally bit the dust 
(mainly due to the electronic con-
trols messing up). Since it's about 10 years old, I figured it wasn't 
worth the cost and/or effort that it 
would take to troubleshoot and fix it but I could not resist rescuing that 
nice 1.5 HP cont. duty, DC 
drive motor from the landfill. Like many treadmill duty motors, it has a 
nicely balanced weighted fly-
wheel pulley on the drive end of the ~3/8" shaft and I was wondering 
what's the best way to remove this 
flywheel with minimal collateral damage to the motor and shaft that it's 
attached to? I'm wondering if the 
motor would run too hot even if the flywheel was successfully removed, as 
the inner side of the flywheel 
has impeller vains that seem to moving most of the air through the motor 
and I doubt that there are any 
impeller fan blades inside the motor housing, due to its relatively small 
size. In other word, I'm concerned 
that the motor is only designed to run with the weighted flywheel pulley 
in place. It looks as if the shaft 
end may be threaded and the flywheel pulley is simply screwed onto the 
shaft but I also wonder how 
much torque it would require to remove it and how one would go about 
locking down the shaft so the 
flywheel could be broken free from it? Of course I'm imagining being able 
to secure a rotory disc to the 
motor shaft for a possible variable speed ARSG and I had also thought of 
simply leaving the flywheel in
place and drilling holes in it for passing through bolts into matching 
holes on the garolite rotory disc.
However, this would be problematic due to the fanned out impeller vains on 
the inside, motor-facing 
side of the flywheel. Not that I have to have a ready made ARSG anytime 
soon, as I already have a 
complete one that's working fine in my current big SG driven coil, but I 
was just wondering how to 
go about this for possible future reference.
 
Thanks for any advice,
David Rieben
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