Works fine, use it all the time. Now my big Vicmarcs I wouldn't use on my
mini...

--
Rusty Myers
Austin, TX

"David Claborn" wrote in message
...
I've heard conflicting reports on whether or not a Supernova chuck is too
heavy for a Jet Mini's bushings/bearings. Is the difference in weight
really all that much?

Relatedly, doesn't the method of tightening the Nova put quite a bit of
weight on the bearings/bushings in the first place -so that the Supernova
may actually be better b/c you never have to tighten with force downward
on
the headstock?

scratching head

Thanks in advance,
Dave

David,

I use both a Nova Compac chuck and a Super Nova on my Jet Mini as I have for
almost 2 years with no problems to date. You will notice a bit of a
"flywheel effect" because of the heavier weight of the Super Nova, but it
has caused me no problems.

I have read various other posts about the added stresses on the headstock
bearings caused by larger and heavier chucks. I don't quite buy their
arguments. The added stresses do not result from the rotation of the chuck
or the forces resulting from tightening the chuck.

The real cause of added stresses on headstock bearings is because with a
bigger and better chuck, you may tend to turn larger and heavier blanks, but
you are still limited by the capacity of the Jet Mini (10" D X 14" L). The
real stresses are caused by turning these larger blanks and using larger
tools which, in turn, generate more leverage against the headstock bearings.
Another factor is that larger chucks tend to "hang" further from the
headstock, which also causes some added stresses.

None of this would stop me from using a Super Nova chuck on a Jet Mini
Lathe. Besides, if you wear out the bearings, just replace them.

Barry


"David Claborn" wrote in message
...
I've heard conflicting reports on whether or not a Supernova chuck is too
heavy for a Jet Mini's bushings/bearings. Is the difference in weight
really all that much?

Relatedly, doesn't the method of tightening the Nova put quite a bit of
weight on the bearings/bushings in the first place -so that the Supernova
may actually be better b/c you never have to tighten with force downward
on
the headstock?

scratching head

Thanks in advance,
Dave

I've heard conflicting reports on whether or not a Supernova chuck is too
heavy for a Jet Mini's bushings/bearings. Is the difference in weight
really all that much?

Relatedly, doesn't the method of tightening the Nova put quite a bit of
weight on the bearings/bushings in the first place -so that the Supernova
may actually be better b/c you never have to tighten with force downward on
the headstock?

scratching head

Thanks in advance,
Dave

Barry N. Turner wrote: I use both a Nova Compac chuck and a Super Nova on
my Jet Mini as I have for almost 2 years with no problems to date(clip)
^^^^^^^^^^^
Barry has it right. This comes up from time to time in this group, and,
after considerable discussion , the answer settles out as Barry said. Not
to worry. It's a concern felt by some turners, particularly those without
engineering background, and those who have not thought it through. The size
and weight of the wood, and the forces resulting from the turning process
have much more to do with the bearing loads that the slight additional size
and weight of the chuck.

Using the tailstock as long as possible when making your pieces probably
preserves your bearings better than a lesser weight chuck. What would
bother me is the loss of capacity from a longer chuck. Regular Novas work
in a bit less space, and as you are tightening the bars against each other,
should make no difference with the bearings, even if they were so weak you
could pull them out of round.

Own two regulars and a Super, and the only way I chose which to use in my
shop is by which jaws are currently attached.

"David Claborn" wrote in message
...
I've heard conflicting reports on whether or not a Supernova chuck is too
heavy for a Jet Mini's bushings/bearings. Is the difference in weight
really all that much?

Relatedly, doesn't the method of tightening the Nova put quite a bit of
weight on the bearings/bushings in the first place -so that the Supernova
may actually be better b/c you never have to tighten with force downward
on
the headstock?

scratching head

Thanks in advance,
Dave

Many of us come by large & heavy old chucks and other fitments, so this
discussion by our engineers and others with experience should be a
helpful guide. Leo's use of 'slight' piques my interest. Does a heavy
but balanced and empty chuck put damaging stress on lathe bearings? If
so, are there any guides as to how heavy the chucks, spindles and
bearings need to be to be compatible? FWIW, once I was warned by an
Atlas Co. employee not to adapt their 3 jaw chuck made for their 12 in.
lathe to their 6" lathe as it would ruin the bearings. Arch

Fortiter,

Since I turned after lunch, I checked. The difference in length between the
Nova and the Super is 3/8 of an inch in the prebored version. Not enough to
worry about. Super's nice.

You can talk to your Physics types about asymmetrical loads, but I wouldn't
worry.

"David Claborn" wrote in message
...
Using the tailstock as long as possible when making your pieces
probably
preserves your bearings better than a lesser weight chuck. What would
bother me is the loss of capacity from a longer chuck. Regular Novas
work
in a bit less space,

I thought the Woodcraft employee took the more expensive option off the
table, but now I'm back to weighing the two. Most turners agree that the
$70 more is well spent on the supernova, so I'm leaning that way. I'd
love
to hear from any fans of the nova over the supernova.

Using the tailstock as long as possible when making your pieces probably
preserves your bearings better than a lesser weight chuck. What would
bother me is the loss of capacity from a longer chuck. Regular Novas
work
in a bit less space, and as you are tightening the bars against each
other,
should make no difference with the bearings, even if they were so weak you
could pull them out of round.

Own two regulars and a Super, and the only way I chose which to use in my
shop is by which jaws are currently attached.


Thanks to everyone for the useful input.

I thought the Woodcraft employee took the more expensive option off the
table, but now I'm back to weighing the two. Most turners agree that the
$70 more is well spent on the supernova, so I'm leaning that way. I'd love
to hear from any fans of the nova over the supernova.

Thanks again,
Dave


"David Claborn" wrote in message
...
I've heard conflicting reports on whether or not a Supernova chuck is
too
heavy for a Jet Mini's bushings/bearings. Is the difference in weight
really all that much?

Relatedly, doesn't the method of tightening the Nova put quite a bit of
weight on the bearings/bushings in the first place -so that the
Supernova
may actually be better b/c you never have to tighten with force downward
on
the headstock?

scratching head

Thanks in advance,
Dave

On Sun, 2 Nov 2003 13:22:59 -0800, "David Claborn"
wrote:

I thought the Woodcraft employee took the more expensive option off the
table, but now I'm back to weighing the two. Most turners agree that the
$70 more is well spent on the supernova, so I'm leaning that way. I'd love
to hear from any fans of the nova over the supernova.

David,
Before you lay down your greenbacks at Woodcraft, take a mosey over to
www.kmstools.com to save a few bucks.

This Canadian dealer has great prices and good customer service, to
boot.

Just a satisfied customer...


--
Chuck *#:^)
chaz3913(AT)yahoo(DOT)com
Anti-spam sig: please remove "NO SPAM" from e-mail address to reply.


September 11, 2001 - Never Forget


-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
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"Chuck" wrote in message
...
On Sun, 2 Nov 2003 13:22:59 -0800, "David Claborn"
wrote:

I thought the Woodcraft employee took the more expensive option off the
table, but now I'm back to weighing the two. Most turners agree that the
$70 more is well spent on the supernova, so I'm leaning that way. I'd
love
to hear from any fans of the nova over the supernova.

David,
Before you lay down your greenbacks at Woodcraft, take a mosey over to
www.kmstools.com to save a few bucks.

This Canadian dealer has great prices and good customer service, to
boot.

Just a satisfied customer...

Yeah, I hate to say it, but I went to Woodcraft to handle and see exactly
what I'm going to get when I finally do pull the trigger and buy one
on-line. : ) Woodcraft is a great place, but when the savings start going
over $15-20, I usually do buy online.

For what it's worth, there's a fellow on ebay who's selling novas for $99
and supernovas for $159, and those include some jaws and your size of
thread. Pretty excellent deal.

Thanks again,
Dave

I bought my Super Nova from KMS Tools with 4 sets of jaws, for about the
same I would have paid elsewhere for the chuck and standard jaws. Nice
folks, too.

Barry


"David Claborn" wrote in message
...
"Chuck" wrote in message
...
On Sun, 2 Nov 2003 13:22:59 -0800, "David Claborn"
wrote:

I thought the Woodcraft employee took the more expensive option off the
table, but now I'm back to weighing the two. Most turners agree that
the
$70 more is well spent on the supernova, so I'm leaning that way. I'd
love
to hear from any fans of the nova over the supernova.

David,
Before you lay down your greenbacks at Woodcraft, take a mosey over to
www.kmstools.com to save a few bucks.

This Canadian dealer has great prices and good customer service, to
boot.

Just a satisfied customer...

Yeah, I hate to say it, but I went to Woodcraft to handle and see exactly
what I'm going to get when I finally do pull the trigger and buy one
on-line. : ) Woodcraft is a great place, but when the savings start
going
over $15-20, I usually do buy online.

For what it's worth, there's a fellow on ebay who's selling novas for $99
and supernovas for $159, and those include some jaws and your size of
thread. Pretty excellent deal.

Thanks again,
Dave