Re: Crossfeed Nut
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gorvil
Jim,
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The nut alone may not solve the problem. If there is a lot of wear on the screw, the nut won't fix it. There is a description in the files area (I think) on how to fix it with a piece of LH 1/2 x 10 Acme rod and a machineable nut from MSC. I bought some to try someday.... Glen Reeser
--- In southbendlathe@yahoogroups.com, "Jim Wilson" <jwilson002@a...> wrote:
Glen, Thanks for the response. I guess I'll buy one from Rose too. Seems like a vital, although seemingly simple, part to cheap out on. Jim ----- Original Message ----- From: "Glen Reeser" <Gorvil@a...> To: <southbendlathe@yahoogroups.com> Sent: Wednesday, June 04, 2003 12:31 PM Subject: [southbendlathe] Re: Crossfeed Nut Jim, The crossfeed nut is shaped like a T. The cross bar part of the T is threaded 7/16 x 10 Acme. The other part of the T is drilled and tapped for a setscrew along the axis of the part. It is also cross drilled for a pin. The set screw and the pin have a taper on the ends. As you drive in the setscrew, it forces out the pin (at 90 degrees to the screw) which impinges on the inside of the cross slide hole. As a last step when assembling the whole thing, you tighten down the set screw. HTH Dennis Pantazis and I have both made replacement cross feed nuts. Dennis had some kind of CNC milling set up that fabricated beutiful looking nuts. For my homemade nuts, I single pointed the Acme threads on my lathe and continually trial fitted the screw until I got a tight fit. I had one of Dennis's nuts on my lathe while I was machining a MLA milling attachment. I used a big carbide cutter in a 4 jaw as a fly cutter. I think the interrupted cut on a big cast iron piece ruined the threads, at least I got a lot of back lash after that. I sent one of my home made nuts to Crazy Bert who was happy with it at first, but after a "milling in the lathe" incident, he had a lot of back lash, too. Maybe the best solution is to buy replacement nuts and screw from Rose. Glen Reeser --- In southbendlathe@yahoogroups.com, "Jim Wilson" <jwilson002@a...> wrote: Dennis, Would you explain please? The nut is supposed to be free to turn? What 60 degree set screw? We are talking about the cross slide and not the compound, right? Please forgive all the questions but this is exactly what I am trying to fix right now and this is all new information to me. Jim ----- Original Message ----- From: "Dennis Pantazis" <dennis@p...> To: <southbendlathe@yahoogroups.com> Sent: Tuesday, June 03, 2003 11:13 PM Subject: RE: [southbendlathe] Crossfeed Nut gary- the threads are 7/16-10 left hand acme. long story...search the archives. does the cross pin move freely in the hole or is gunged up? try cleaning it. check the 60deg point setscrew too, make sure its a FULL point. you need to trap the nut as there is no outboard bearing on the screw. it will waller everything out. dennis -- Web: http://groups.yahoo.com/group/southbendlathe/ More pix: http://groups.yahoo.com/group/SouthBendLathePix/ Newbie guide: http://smaa.techwood.net/SBL/Newbie.pdf FAQ: http://groups.yahoo.com/group/sblinfo/files/SouthBendLatheFAQ.html Post: southbendlathe@yahoogroups.com Email Moderators: southbendlathe-owner@yahoogroups.com * * * * * Manage your subscription by sending a blank message as follows: Unsubscribe: southbendlathe-unsubscribe@yahoogroups.com Stop delivery: southbendlathe-nomail@yahoogroups.com Daily digest mode: southbendlathe-digest@yahoogroups.com Individual emails: southbendlathe-normal@yahoogroups.com Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ -- Web: http://groups.yahoo.com/group/southbendlathe/ More pix: http://groups.yahoo.com/group/SouthBendLathePix/ Newbie guide: http://smaa.techwood.net/SBL/Newbie.pdf FAQ: http://groups.yahoo.com/group/sblinfo/files/SouthBendLatheFAQ.html Post: southbendlathe@yahoogroups.com Email Moderators: southbendlathe-owner@yahoogroups.com * * * * * Manage your subscription by sending a blank message as follows: Unsubscribe: southbendlathe-unsubscribe@yahoogroups.com Stop delivery: southbendlathe-nomail@yahoogroups.com Daily digest mode: southbendlathe-digest@yahoogroups.com Individual emails: southbendlathe-normal@yahoogroups.com Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
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