Re: synchronous motor

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>

Hi Justin,

Also, you can use a pulley to attach to the disk and a center-press hub
designed to
fit the pulley hole and shaft. Center's the disk to the shaft very well.
They are
low cost items. I purchased this set up for about $10 all together at Fleet
Farm
back when I lived in MN (man, I miss that store). Anyway, just a thought
for you.
It's worked great for me and should I use another motor with a different shaft
size, I can easily pick up a hub for it without any further modifications
required
(the shaft sizes come in many different common sizes, but the pulley hole is
standard). You can mount the disk on and off in seconds and always have it
pefectly
mounted. Saves a lot of time messing around with part of the system.

Take care,
Bart

Tesla list wrote:

> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<FutureT-at-aol-dot-com>
>
> Justin,
>
> There are a number of ways to attach the disc to the motor.
>
> 1)   Use an arbor which can be from a drill chuck.  In this
> case, you don't use the chuck, but the arbor fits over the
> motor shaft, and has a threaded portion on the other end.
> This goes through the disc and a nut is tightened onto the
> threaded portion of arbor.  These arbors are available
> without the drill chuck.  (I don't know where to find or buy
> any of the items I mention.)
>
> 2)  Find a small pulley which fits onto the motor shaft.  Drill
> and tap 3 or 4 holes into the pulley, and drill matching holes
> into the disc.  Use a strong pulley and strong screws to hold the
> disc to the pulley
>
> 4)  Find some other pulley-like object which fits the motor
> shaft and use it as in (3) above.  Sometimes it is possible
> to drill only a center hole and use a large bolt at the center
> if the pulley is long, so it extends past the end of the motor
> shaft.  If you use just a center bolt, be sure to use a star-
> gripping washer beneath the rotor, and one under the screw
> so the disc won't spin loose.  There's a tendency for the
> disc to loosen the screw when the motor is shut off.......
> especially if there's any self-braking going on, in the case
> of a large motor used with the electrical sync gap phase
> shifter circuit.
>
> 5)  Have a special hub machined specially for the disc.
>
> John