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Re: [TCML] Flywheel Pulley on Treadmill Motor
Many things in my experience are set to self-tighten. I haven't torn mine apart, but would guess that it would be threaded to self-tighten.
I had a '70 Duster that had opposite lug nuts on opposite sides.
________________________________
From: David Rieben <drieben@xxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Thursday, August 1, 2013 6:41 AM
Subject: Re: [TCML] Flywheel Pulley on Treadmill Motor
Hi Adam, all,
Thanks for the numerous response and ideas. Actually, I looked a bit closer last night and took the
two bolts loose that hold the armature, shaft assembly inside and aligned with the motor outer case
"shell" containing the permanent magnets. I'm thinking one may need to simply remove the armature
and clamp securely with a vise (with possible padding between the armature surface and the vise
jaws), then work on clamping and torquing that flywheel off. There is no "nut" as the flywheel pul-
ley assembly is obviously itself threaded with female threads onto the male threaded shaft of the
motor. And trying to possibly drill holes into the flywheel part of the assembly in an even circular
pattern while at the same time dodging the impeller veins on the opposite side would also prove
challeging as there are 13 evenly spaced veins. And I don't really have the machining facilities at
my desposal to to a "proper" job of this, anyway.
The next question is are the threads on the shaft left-hand or standard right-hand thread? The shaft
turns CW as you face the motor from the flywheel end of it (the shaft spins the same direction that
you would turn the flywheel to TIGHTEN it, IF it's a standard right-hand thread. I'm thinking that it
may be left-hand thread because my stick edger also turns the blade CW as you face the blade end
and the threaded shank and matching nut that hold it in place are left-hand threaded. Any suggestions
here also welcome.
David Rieben
From: Yurtle Turtle <yurtle_t@xxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Wednesday, July 31, 2013 5:07 PM
Subject: Re: [TCML] Flywheel Pulley on Treadmill Motor
Yeah, just remove the nut.
Wish we'd thought of that.
________________________________
From: Tim Flood <tfloodrr@xxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Wednesday, July 31, 2013 10:09 AM
Subject: Re: [TCML] Flywheel Pulley on Treadmill Motor
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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