Hello,
I have an old Cincinnati 13x60 lathe the I would like to use for long
tapers. There is a "taper attachment" or the remnants of one already in
place but I cannot figure out how it works. It is the telescoping
variety, with several other bells and whistles that don't make sense
due to missing pieces. I would guess it is original equipment (ie...it
doesn't look aftermarket).
Does anyone out there have any information/diagrams/etc. on a mid
1960's Cincinnati taper attachment.
I read several previous posts and found "Metal Lathe Attachments" and
am hoping someone might be able to point me to a set of plans or
something like it.
Thanks in advance.
what usually gets lost is the way clamp and rod. Ther must be a clamp of
some type to clamp to the bed all the way by the tailstock, an a hefty
rod that attaches to the taper attachment and is calmped to this clamp,
leving this loose allows the lathe to function azs normal, tightening it
and otherwise setting thetaper attachment up turns a taper.
andy wrote:
I don't have any info for you, Andy, about the taper attachment. I was
just daydreaming about what a great time it was in the early and
mid-60's in the metalworking field.....
I guess I better come down-to-earth and get back to work!
John
andy wrote:
Well ... none specific to the Cinci, but since you say that it
is a telescoping one, I'll describe how I understand them to work.
1) The "telescoping" part is a spline which couples the cross-feed
handwheel to the cross-feed leadscrew. Let's assume that the
nut remains in the cross-slide, but instead of the leadscrew
being attached to the flange which mounts the handwheel as
usual, it is instead attached to a sliding block straddling the
taper bar, with a ball bearing, and provisions to make it
self-align when the taper bar is shifted to a new angle.
2) The taper bar is attached to another bar which rides in a
dovetail on the back of the carriage. It is pivoted in the
middle of this, and locked at the two ends. There are typically
two angle scales -- one in degrees, and one in inches/foot.
(And they aren't always clearly marked as to which is which, so
you have to learn to recognize which is which.
3) Under non-taper conditions, the taper bar and its support bar
ride along with the carriage, so there is no effect upon the
cross-slide position.
4) However, when you are cutting tapers, the tailstock end of the
support bar (which is connected to a clamp via a rod) is fixed
via a clamp near the tailstock. At this point, when the
carriage is moved, the support bar slides in its dovetail,
bearing the taper bar with it. Since the cross-slide leadscrew
is mounted to a block riding on the taper bar, as it slides, it
moves the cross-slide one way or the other.
Non-telescoping taper attachments are simpler to make, but more
difficult to use. You have to uncouple the nut from the cross-slide
(sometimes you have to remove it), and then clamp a tail projection of
the cross-slide to the block which rides on the taper bar. You lose the
ability to use the cross-feed leadscrew and handwheel, but otherwise the
operation is similar. This is what I have, and mine has provisions for
unclamping a special replacement cross-slide nut from the cross-slide
prior to clamping the sliding block to the tail of the cross-slide.
If you think that the Clausing manual will give you enough of an
idea -- here are the URLs for two styles of taper attachment for the
Clausing which I use.
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IIRC, the first is the plain type, and the second is the telescoping
type. Ok -- yes it is. And be warned that it is a PDF created from
scanning a manual, so it is big -- about 1.5 MB for only four pages --
and a bit slow to display. But it should print well on a 600 DPI laser
printer which does PostScript.
Good Luck,
DoN.
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