[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [TCML] Re: Tesla Digest, Vol 69, Issue 27
Hi Carl, all,
Looks like mine is definitely threaded on, as there is no key way slot and I just ran it this morning slowly enough through my variac to watch the end of the shaft, which is just about flush with the pulley end of the flywheel. I can just barely see that the thread-spin orientation is definitely a left-hand thread, though. I even compared the thread inclination of the shaft with that of a known standard right-hand threaded bolt to completely verify my suspicion. So it looks like the "best" way to go about removing the flywheel/pulley assembly from the shaft is to remove the armature from the motor shell, firmly clamp down the armature via padded vise jaws and proceed to twist off the flywheel from the shaft, noting that the flywheel/pulley will need to be twisted CW to loosen.
David Rieben
Carl Bradley <old_fogey@xxxxxxxxx> wrote:
>They are usually pressed on.
>From: Russell L Thornton <Russell.L.Thornton@xxxxxxxx>
>To: tesla@xxxxxxxxxx
>Sent: Wednesday, July 31, 2013 2:26 PM
>Subject: [TCML] Re: Tesla Digest, Vol 69, Issue 27
>
>
>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
>_______________________________________________
>Tesla mailing list
>Tesla@xxxxxxxxxx
>http://www.pupman.com/mailman/listinfo/tesla
>_______________________________________________
>Tesla mailing list
>Tesla@xxxxxxxxxx
>http://www.pupman.com/mailman/listinfo/tesla
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla