taper attachment question

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.
Reply to
Loading thread data ...
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:
Reply to
Is it a Hydramatic or what? - GWE
Reply to
Grant Erwin
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!
andy wrote:
Reply to
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.
formatting link
formatting link
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.
Reply to
DoN. Nichols

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.