Re: SRSG - Making hubs

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <FutureT-at-aol-dot-com>

In a message dated 7/24/02 10:08:53 AM Eastern Daylight Time, tesla-at-pupman-dot-com
writes:

Winston,

Don't feel bad, it's very tricky to do this work precisely, unless you're
very skilled in machining.

I'm no expert.  I just took a piece of nice 1" aluminum stock,
cut it to length, then placed it into the lathe chuck and used
a drill bid placed into the dead center to drill the hole for the 
shaft.  I used a drill one size smaller for the first cut.  I was
just lucky that it came out well, because the lathe is kind
of wobbly.  The center hole at the hub end that holds the
rotor is off-center a little, so I bolted the rotor in place onto
the hub, and turned it concentric on the lathe so it all turns
concentricly as long as the rotor is in a certain rotational position
relative to the hub.  I marked the spot with a scribe.  So it's all
slightly crude, but works well with no wobble.

Cheers,
John


>
> Hi John,
>
>     Could you share your method of making hubs?  I made one for my "big"
> SRSG, and it wobbles a bit.  I guess the center hole isn't quite
> straight.  Is good Al stock (straight, and of even composition)
> necessary?  I can't afford big metal stock of any kind, so I used a slug
> of melted down Al cans cast into 1.5" copper pipe.  It works, but not
> the way I'd like it to.  I'm dissapointed, since I was very careful in
> machining the piece, and used decent tools.  I'm also feel bad, since I
> have access to high quality/somewhat rare equipment, yet can't make
> something as simple as a hub ;-(.
>
> Peace/good cheer to all,
> Winston K.
>
>