Re: RSG Mounting Problem

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

Original poster: Bart Anderson <classi6-at-classictesla-dot-com> 

Hi Ian,

I use a press center hub. You'll find these in the motor section of a 
hardware store. Basically, the hub is used to attach a pulley of some type 
to the shaft. 2 machine screws pull the hub on and into the pulley, which 
causes the hub to clamp onto the motor shaft. There are no problems with 
set screws or anything of that nature to deal with. It's a very secure fit 
and naturally centers the pulley perpendicular to the shaft. What I did for 
my G10/tungsten disc, was to attach the disc to the pulley with three grade 
8 bolts. Then it's just a matter of sliding on the disc and inserting the 
hub. The pulley is heavy and wouldn't be good for small motors if trying to 
stay in sync, but for say 1/4 HP or larger, it's a good arrangement. The 
added weight of the pulley helps with dampen the initial startup stress of 
the disc.

Anyway, that's what I do.

Take care,
Bart

Tesla list wrote:

>Original poster: "Ian McLean" <ianmm-at-optusnet-dot-com.au>
>Hi everyone,
>
>Anyone know where I can get a hub for a half inch shaft (cheap) that I can
>use for my tungsten SRSG?  Only thing holding up it's completion.
>Prefer a
>four hole connector plate on the end, and hollow all the way through, with
>grub screws.  Having lot's of trouble trying to find something I can use to
>attach to my 12" diameter, 1/4 inch thick HDPE platter.
>
>The motor spindle is 1/2" dia shaft with a flat down one side, ideal for a
>1/2" holed assembly with one or two grub screws.  I would prefer the hole to
>go all the way through the hub for best alignment capability.  Any ideas
>where I can get something like this anyone ?
>
>Oh how I wish I had access to a lathe ...
>
>PS: I am in Sydney, Australia.
>
>Thanks and regards
>Ian.
>
>
>
>