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14.5" Southbend Crossfeed Nut
"Mike" wrote in message . com... Help...I need one of these. The one in my lathe is wasted. I contacted Southbend and they want like $995 for a new screw and nut. THe screw is bent but straightenable if I can get a nut. Anybody know of another source ? Or help point me in the direction of making one ? I'm talkin' out of school, because I've never seen the crossfeed parts for a SB lathe. But... It should be something on the order of a simple post with an Acme threaded hole. Doesn't _seem_ like that bad a job. Threading the hole with a clean Acme profile will probably be the hardest part. Ones I've done bugged me with a lot of chatter. I'd have been happier with an Acme tap (I think). Is it a simple nut captured in a holder or is it a post arrangement, like the cross-nut on my Reed? LLoyd |
14.5" Southbend Crossfeed Nut
Mike,
I bought the nut from SB and made the screw to fit it. I got by for less than $100. If I were to do it again I'd make a tap at the same time and at the same settings as the lead screw and make the nut myself... just because. I made my screw on my 10" Logan after making a follower rest for it. I think it would be nearly impossible without a follower. George Willer "Mike" wrote in message . com... Help...I need one of these. The one in my lathe is wasted. I contacted Southbend and they want like $995 for a new screw and nut. THe screw is bent but straightenable if I can get a nut. Anybody know of another source ? Or help point me in the direction of making one ? I have done threading on a lthe a couple of times..but it has been awhile. I have a nice 10" sheldon to use to make the nut on. PLease help... Thanks Mike Miller |
14.5" Southbend Crossfeed Nut
Mike wrote: Help...I need one of these. The one in my lathe is wasted. I contacted Southbend and they want like $995 for a new screw and nut. THe screw is bent but straightenable if I can get a nut. Anybody know of another source ? Or help point me in the direction of making one ? I have done threading on a lthe a couple of times..but it has been awhile. I have a nice 10" sheldon to use to make the nut on. I made an Acme screw and nut for an Atlas lathe some years ago. I started with hardened rod, which made the job a lot harder. I made the nut out of brass. It worked very well. One thing, the typical crossfeed screw is LEFT hand thread! Guess how I know THAT! I made a standard right- hand screw, and it wasn't until I put it on the lathe that I discovered the slide moved the WRONG WAY! OOPS! Jon |
14.5" Southbend Crossfeed Nut
Lloyd E. Sponenburgh wrote: "Mike" wrote in message .com... Help...I need one of these. The one in my lathe is wasted. I contacted Southbend and they want like $995 for a new screw and nut. THe screw is bent but straightenable if I can get a nut. Anybody know of another source ? Or help point me in the direction of making one ? I'm talkin' out of school, because I've never seen the crossfeed parts for a SB lathe. But... It should be something on the order of a simple post with an Acme threaded hole. Doesn't _seem_ like that bad a job. Threading the hole with a clean Acme profile will probably be the hardest part. Ones I've done bugged me with a lot of chatter. I'd have been happier with an Acme tap (I think). Is it a simple nut captured in a holder or is it a post arrangement, like the cross-nut on my Reed? LLoyd Not meaning to butt in here but the crossfeed nut on my old no-name brand taiwan lathe is toast also. Mine is a brass block, acme style thread, with the block split into 2 pieces at an angle so you can theoretically (only theory) take up play. I hate to go back to a failed system (of course it took 30 years to fail so I guess I shouldn't complain) so what would you folks recommend going with if I made a new set-up from scratch? I have to replace the cross feed screw anyway due to wear so I'm just seeking the best option people have seen....the "wish mine was done that way" solution. Koz |
14.5" Southbend Crossfeed Nut
Never tried this my self, but may be worthwhile.
One of the old-technology books from Lindsay books on babbit bearings mentions casting a halfnut from babbit using the leadscrew as a pattern. Apparently this worked very well and the old time writers felt a babbit nut worked better than a brass one -- less wear -- easy renewal, etc. see: http://www.lindsaybks.com/prod/sub/machine.html I have all three of the babbit books, but don't remember which one this was in. These are cheap enough to get all three. http://www.lindsaybks.com/bks4/babbitt/index.html http://www.lindsaybks.com/bks7/babb/index.html I don't know what sort of accuracy you are looking for, but you might investigate replacing the leadscrew with a piece of "acme" allthread if its worn. You also might consider using some of the way surfacing/rebuild compounds such as moglice to build up the half nut using the leadscrew as a mold. [be sure to apply release compound ....] the diamet company [apparently parent of moglice] makes specific reference to halfnuts/leads screws see http://diamant.ph/en/referenzen/details/?refid=all see http://www.jmtsales.com/moglice.htm and http://moglice.de/en/home/ I have no idea about the cost/availibility of the small quantities you will require. also see http://www.lsitvc.com/ http://feedscrews.com/supplier/329 Uncle George On Thu, 8 Dec 2005 15:47:42 -0500, "George Willer" wrote: Mike, I bought the nut from SB and made the screw to fit it. I got by for less than $100. If I were to do it again I'd make a tap at the same time and at the same settings as the lead screw and make the nut myself... just because. I made my screw on my 10" Logan after making a follower rest for it. I think it would be nearly impossible without a follower. George Willer "Mike" wrote in message .com... Help...I need one of these. The one in my lathe is wasted. I contacted Southbend and they want like $995 for a new screw and nut. THe screw is bent but straightenable if I can get a nut. Anybody know of another source ? Or help point me in the direction of making one ? I have done threading on a lthe a couple of times..but it has been awhile. I have a nice 10" sheldon to use to make the nut on. PLease help... Thanks Mike Miller |
14.5" Southbend Crossfeed Nut
These folks have lots of parts:
http://www.partsworksinc.net/ I also have a 14.5" SB. I am looking for one of the twin gears. It has 28 teeth, is 14 pitch. Parts Works doesn't have it. If you come across any possible sources, please let me know. Steve Mike wrote: Help...I need one of these. The one in my lathe is wasted. I contacted Southbend and they want like $995 for a new screw and nut. THe screw is bent but straightenable if I can get a nut. Anybody know of another source ? Or help point me in the direction of making one ? I have done threading on a lthe a couple of times..but it has been awhile. I have a nice 10" sheldon to use to make the nut on. PLease help... Thanks Mike Miller |
14.5" Southbend Crossfeed Nut
Lloyd,
It's a post, probably like your Reed. It wouldn't be too difficult to carve out after first creating an accurately tapped hole and then working outward. A simple tap made at the same time as the screw could be used to nicely finish the hole after roughing the thread with a single point tool. That is how this non-professional would approach the problem... and save a lot of money while making a top quality nut and screw. George Willer "Lloyd E. Sponenburgh" wrote in message . .. "Mike" wrote in message . com... Help...I need one of these. The one in my lathe is wasted. I contacted Southbend and they want like $995 for a new screw and nut. THe screw is bent but straightenable if I can get a nut. Anybody know of another source ? Or help point me in the direction of making one ? I'm talkin' out of school, because I've never seen the crossfeed parts for a SB lathe. But... It should be something on the order of a simple post with an Acme threaded hole. Doesn't _seem_ like that bad a job. Threading the hole with a clean Acme profile will probably be the hardest part. Ones I've done bugged me with a lot of chatter. I'd have been happier with an Acme tap (I think). Is it a simple nut captured in a holder or is it a post arrangement, like the cross-nut on my Reed? LLoyd |
14.5" Southbend Crossfeed Nut
In article , Mike says...
Help...I need one of these. The one in my lathe is wasted. I contacted Southbend and they want like $995 for a new screw and nut. THe screw is bent but straightenable if I can get a nut. Anybody know of another source ? Miller Machine and Fabrication: http://www.millermachineandfabrication.com/products.html#southbend I've heard good things about them. Jim -- ================================================== please reply to: JRR(zero) at pkmfgvm4 (dot) vnet (dot) ibm (dot) com ================================================== |
14.5" Southbend Crossfeed Nut
On Thu, 08 Dec 2005 20:31:12 GMT, Mike wrote:
Help...I need one of these. The one in my lathe is wasted. I contacted Southbend and they want like $995 for a new screw and nut. THe screw is bent but straightenable if I can get a nut. Anybody know of another source ? Or help point me in the direction of making one ? I have done threading on a lthe a couple of times..but it has been awhile. I have a nice 10" sheldon to use to make the nut on. PLease help... Thanks Mike Miller Lood here to see how I did a similar repair. But instead of one lathe I had (as I recall) 6 that needed repair. All the lathes are still working fine four years later. http://pages.cthome.net/errol.groff/...rew_repair.htm Errol Groff Instructor, Machine Tool Department H.H. Ellis Technical High School 643 Upper Maple Street Danielson, CT 06239 New England Model Engineering Society www.neme-s.org |
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