Re: [TCML] Flywheel Pulley on Treadmill Motor

[David <drieben@xxxxxxx>]

Hi Tim,

Thanks for for your response. Actually, it appears that my flywheel pulley is itself female threaded onto the male threads of the motor shaft itself, so tapping or pulling it off wouldn't work. There is a small protrusion of the shaft from the opposite end of the motor that could possibly gripped with locking pliers (visegrips) to secure the shaft while the pulley is unscrewed from the working end of the shaft, but I fear the torque required to break the pulley free would cause deformation, if not total destruction of the small shaft protrusion being held by the locking pliers.

David Rieben 

Sent from my iPhone

On Jul 31, 2013, at 9:09 AM, Tim Flood <tfloodrr@xxxxxxxxx> wrote:

> Hi David,
> 
> Removal of the balanced pulley should not effect the balance of the motor.
> Some pulley mfg's. typically balance their product, especially when a
> second part is added. Your motor may not need a fan for your use. If by
> chance it does just add a small external fan.
> 
> Not seeing the motor/pulley and if it were mine I would first remove the
> nut. Tap on the back side of the pulley with a soft-face hammer moving
> around the circumference as you tap. If this does not work I would next use
> a puller.
> 
> Hope this helps.
> 
> Tim Flood
> 
> 
> On Wed, Jul 31, 2013 at 2:48 AM, Yurtle Turtle <yurtle_t@xxxxxxxxx> wrote:
> 
>> I have a similar motor and (functioning) controller, and am awaiting
>> responses.
>> 
>> My controller can be controlled by a big knob.
>> 
>> I currently have a VFD AC motor, but options are always nice, as I've
>> smoked two VFDs.
>> 
>> 
>> 
>> ________________________________
>> From: David Rieben <drieben@xxxxxxx>
>> To: "tesla@xxxxxxxxxx" <tesla@xxxxxxxxxx>
>> Sent: Tuesday, July 30, 2013 9:40 PM
>> Subject: [TCML] Flywheel Pulley on Treadmill Motor
>> 
>> 
>> 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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