Re: [TCML] Flywheel Pulley on Treadmill Motor

[Tim Flood <tfloodrr@xxxxxxxxx>]

David,

Sometimes motor shafts of this configuration are made to insert an allen
wrench in the end. Doesn't sound like yours does.

The next thing I would try is put the V belt around the pulley and grip the
belt/pulley with a large pair of Channel Locks or similar tool. Give the
tool handle a sharp rap with a soft-faced hammer with the motor held
securely.

Tim Flood


On Wed, Jul 31, 2013 at 11:17 AM, David <drieben@xxxxxxx> wrote:

> 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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