CRAZY LATHE IDEA

[KENNETH BROWN]

I RUN A 13 FOOT DRILL PIPE IN A SLANT BED LATHE TAKES 2 GUYS TO RUN THIS JOB. MY COMPANY IS PURCHASING A MORI SEIKI SL-6B LATHE TO RUN THESE ON. I HAVE ISSUES WITH THE MACHINE THEY ARE ON NOW AS JAW STROKE WONT ALLOW ME TO DIRECT CLAMP ON THE PART, I HAVE TO ADD TOOTHED EXTENTIONS.THEY WANT TO PUT 2 SCROLL CHUCKS ON THE NEW MACHINE ONE IN FRONT AND ONE IN BACK. I HAVE NEVER MOUNTED A CHUCK TO THE BACK OF A LATHE AND HAVE NO IDEA HOW THEY PLAN ON DOING THIS.SO MY ? CAN THIS BE DONE AND HAS ANYONE EVER TRIED THIS BEFORE. ANY THOUGHTS OR IDEAS?

[mnd]

You mean something like this? Or a chuck on the tailstock?



(Large spindle bore and a chuck on the back side of the headstock are normal features of "oilfield lathes")

[KENNETH BROWN]

THATS WHAT THEY WANT THANKS FOR THE PIC . I AM IN ILLINOIS NOT A LOT OF OIL FIELDS AROUND HERE HAD HEARD OF THIS BUT NEVER SEEN .
STILL NOT SURE HOW TO ATTACH TO THE MORI BUT NOW I KNOW IT CAN BE DONE. AGAIN THANKS

[Bear]

thats why the other end is threaded
( for attachments )
Bear

[ironDigit]

impressive find but what the #!%*;> would you want a chuck on the bed of your lathe for ?

mind boggling.

[mnd]

Originally Posted by ironDigit impressive find but what the #!%*;> would you want a chuck on the bed of your lathe for ? mind boggling.

Turning threads on pipe.

Thats a 9" spindle bore I believe.

[mnd]

Here is another lathe, as installed.

[g-codeguy]

Originally Posted by KENNETH BROWN I RUN A 13 FOOT DRILL PIPE IN A SLANT BED LATHE TAKES 2 GUYS TO RUN THIS JOB. MY COMPANY IS PURCHASING A MORI SEIKI SL-6B LATHE TO RUN THESE ON. I HAVE ISSUES WITH THE MACHINE THEY ARE ON NOW AS JAW STROKE WONT ALLOW ME TO DIRECT CLAMP ON THE PART, I HAVE TO ADD TOOTHED EXTENTIONS.THEY WANT TO PUT 2 SCROLL CHUCKS ON THE NEW MACHINE ONE IN FRONT AND ONE IN BACK. I HAVE NEVER MOUNTED A CHUCK TO THE BACK OF A LATHE AND HAVE NO IDEA HOW THEY PLAN ON DOING THIS.SO MY ? CAN THIS BE DONE AND HAS ANYONE EVER TRIED THIS BEFORE. ANY THOUGHTS OR IDEAS?

Please take off your caps. All capital letters is considered yelling and isn't good etiquette on the web. Plus it seems harder to read when you aren't use to it.

Okay, flame me!

[RICHARD ZASTROW]

I saw a lathe once upon a time, long, long ago that had such a headstock installed at 1/3 of the bed length. Typical large engine lathe on the right hand side of the headstock and a boring set-up left of headstock. End product was 155mm artillery barrels. Pretty good sized thru hole to swallow that tube.

[KENNETH BROWN]

sorry about cap"s program all dat so that's all i see. okay seem's to me that this is done to engine lathes but iam being asked to but this on a cnc lathe with a exsiting hydrulic chuck there are no threads at the back to attach anything olny the hydrulic housing as far as i can tell

[Geof]

I think it will be impossible to mount a chuck on the end of the spindle with the hydraulic chuck still in use. If the hydraulic chuck and the hydraulic cylinder are both removed there will be a flange with a bolt circle on the end of the spindle that a manual chuck could be adapted to.

[mnd]

Even with a chuck on the back of the headstock you're going to need some sort of free standing steady rest(s) outboard to support the pipe.

I'm pretty sure that once you're done retrofitting your SL6B you'll be stuck with an old machine with a limited capacity (6.3" spindle bore?).

(This is what a 6B looks like, minus some sheet metal and the control.)