Hi Ed,
No, it wouldn't matter which direction you were cutting. The taper
is a result of a changing distance between the tool point and the
spindle axis.
Dave, your chuck may not be a factor in your taper. If the test bar
is tight and not moving in the jaws, a little clearance at the ends
of the jaws wont matter. As others have mentioned, the test bar
should fairly large in OD. I'm using a piece of 1 3/4" 6061. I
think the journals are down to about 1.680 now with a slightly
smaller relief in between.
Yes, I can see a new chuck in your future.... :-) Your chuck is
probably worn to a point where new jaws wouldn't help. Even if you
got new jaws, it's my understanding that they would have to be ground
to to match your chuck. I wonder if Dennis has a trick to "load" the
jaws under tension so you could use a boring bar to true up your
existing jaws.
Jim
--- In daltonlathes@..., "Ed stoller" <edstoller@...>
wrote:
As a non machinist lurking in the background here, I wonder if the
taper would be the same if you cut from right to left and left to
right. I have the same problem with my Senica Falls 103 year old
lathe which is very worn and had been abused.
Ed Stoller
New Fairfield, CT
----- Original Message -----
From: Dave
To: daltonlathes@...
Sent: Wednesday, June 21, 2006 7:49 PM
Subject: [daltonlathes] Re: Taper
Good evening gentlemen,
Well, it turns that at least some of the taper is due to the
chuck
jaws. I can fit a .002 feeler gage in between the jaws and the
work.
Sooo, anybody know if there are jaws still available for a
Cushman, or
is it time for a new chuck?
Dave
