Re: arbors

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

Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>" <dhmccauley-at-spacecatlighting-dot-com>


Well, seeing you are using some hefty 1/2" G-10, then arbors are out of the
question.  If you had a small rinky-dink spark gap, then the arbors may
work, but for anything of some size,
you'll need to make a 4-bolt flange-hub connection or similar.

Dan



 > Hi all,
 >
 > I was thinking about redoing my RSG (maybe make it synchronous
 > and upgrade to G-10 and tungsten), anyway I was wondering if a ty-
 > pical arbor for attaching an emery wheel to the shaft of a motor would
 > suffice as a fastening mechanism for attachment of the RSG disc to
 > the shaft of the motor? I've used similar euipment before to accomplish
 > this although I have had a bit of trouble with wobble of the disc perpen-
 > dicular to the shaft. Is this going to be an ongoing problem with the ar-
 > bor type of shaft attachment? I've noticed that many RSGs have a hub
 > the has like 4 screws or bolts through the hub. Is this type of hub at-
 > tachment required to suppress the annoying disc wobble and if so can
 > they be purchased locally or do I have to order them from McMaster-
 > Carr or a similar outfit?
 >
 > Also, I have a decent sized piece of 1/2" G-10 and have already drilled
holes
 > for the shaft and the rotory electrodes. My problem is that I need to
 > cut the disc out and I don't have any decent machining facilities (only
 > basic tools) so I'm figuring on having to take it a local plastics
fabricator
 > and have them cut it out and drill and tap some holes in the outer peri-
 > phery of the disc lined up with the electrode holes so I can use
set-screws
 > to secure the tungsten flying electrodes. I'm sure this sounds quite ele-
 > mentary to many of you but I have only used threaded rods or bolts and
 > nuts to hold them in place as flying electrodes in the past, so using
 > smooth tungsten rods as flying (and stationary) electrodes is new terri-
 > tory to me :^)
 >
 > Thank you,
 > David Rieben
 >
 >
 >
 >
 >