Re: SRSG - rotor attachment

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Hi Bart,

I looked at the grainger bushings and thought the OD of the flange 
was rather small.  The ones at McMaster are larger diameter (over 4 
inches), which I think will be desireable for a larger rotor.

Gerry R.

> Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>
>
> Hi Terry,
>
> I'm not impressed with the set screw shaft attachment. If there is 
> any play in the coupler to shaft, the set screw is going to make the 
> disk "wobble" (especially the looks of this attachment).
>
> I use what I call a press-center hub (split taper bushing). David 
> just mentioned his bushing from Grainger. That is certainly a better 
> choice. They run $6 for a 5/8" bore, so they are very reasonable. 
> The outer flange bolt holes are the same across a range of bore 
> sizes, so coilers could easily pick up a bushing for a different 
> bore (should they change their motor) without having to modify the 
> disc. The secure attachment of this bushing as well as the center 
> fit makes it a perfect choice for RSG disc mounting (and no 
> machining required!).
>
> Take care,
> Bart
>
> Tesla list wrote:
>
> > Original poster: "Terry Blake" <tb3@xxxxxxx>
> >
> > Hi all,
> >
> > There is an item called an arbor attachment for electric motors.
> > McMaster
> > catalog page 2523.
> >
> > The item description is as follows;
> > Convert your bench-mount motor into a grinder-buffer. Fit this attachment
> > onto the motor shaft and then mount wire wheel brushes, grinding wheels, and
> > more. Shaft thread is right hand. Flanges and hex nut are included.
> >
> > They support shaft diameters from 1/4" to 5/8" and the most expensive one is
> > only $4.50.
> >
> > Here is the one you may be interested in;
> > Item 43555A25
> > Arbor Attachment for Electric Motors Fits 5/8" Shaft Dia, 1/2"-20 Wheel
> > Arbor Size
> > In stock at $4.50 Each
> >
> > I have never used one of these, but they look promising.
> >
> > Remember to make an enclosure for the rotary gaps.
> >
> > Cheers,
> >
> > Terry Blake
> > Coiling in Chicago
> > http://www.tb3.com/tesla/index.html
> >
> >
> >
> >
> >
> > ----- Original Message -----
> > From: "Tesla list" <tesla@xxxxxxxxxx>
> > To: <tesla@xxxxxxxxxx>
> > Sent: Saturday, May 13, 2006 1:05 PM
> > Subject: Re: SRSG - rotor attachment
> >
> >
> > > Original poster: "Scott Hanson" <huil888@xxxxxxxxxxxx>
> > >
> > > David -
> > >
> > > The split-taper bushings listed by McMaster-Carr are just the
> > > adapters needed to couple a motor shaft of a specific diameter to a
> > > flanged hub that you would bolt the RSG rotor to. As far as I can
> > > tell, McMaster does not offer just a flanged hub with the correct
> > > female taper to accept the split-taper bushings.
> > >
> > > They do offer hardened steel sprockets that accept the taper-lock
> > > bushings, but these are through-hardened and would take a lot of
> > > machine work (EDM & grinding) to remove the sprocket teeth and add
> > > the bolt holes for the RSG disk.
> > >
> > > Or have you found something hidden in the McMaster catalog that would
> > > provide the complete solution for mounting an RSG disk directly to a
> > > motor shaft (3/8", 1/2", 5/8", or 3/4" dia)?
> > >
> > > Regards,
> > > Scott Hanson
> > > ----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
> > > To: <tesla@xxxxxxxxxx
> > > Sent: Saturday, May 13, 2006 9:56 AM
> > > Subject: Re: SRSG - rotor attachment
> > >
> > >
> > > >Original poster: DRIEBEN@xxxxxxxxxxxxxxx
> > > >Gerry,
> > > >
> > > >You can get these adapters from McMaster-Carr
> > > >or a local branch of an industrial supply
> > > >chain like Johnstone or Grainger. What you're
> > > >looking for is called a "split taper bushing".
> > > >
> > > >David Rieben
> > > >
> > > >----- Original Message -----
> > > >From: Tesla list <tesla@xxxxxxxxxx>
> > > >Date: Saturday, May 13, 2006 8:30 am
> > > >Subject: SRSG - rotor attachment
> > > >To: tesla@xxxxxxxxxx
> > > >
> > > > > Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>
> > > > >
> > > > > Hi All,
> > > > >
> > > > > My previous SRSG used a motor that already had an aluminum piece
> > > > > to
> > > > > attach the rotor to the motor shaft.  My higher HP motor does not
> > > > > have this adapter (not sure what the correct name for it is).
> > > > > Does
> > > > > anyone know where I can get an adapter for a 5/8 dia motor shaft
> > > > > to
> > > > > attach the rotor to (or do I need to machine it)???
> > > > >
> > > > > Gerry R.
> > > > >
> > > > >
> > > >
> > >
> > >
> > >