Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
If the you cannot source a useable half nut and yours still works well enough, turn a bushing with the thread internally, and cut a section to replace the threads in yours.
If the threads are damaged beyond trusting them, casting a set of threads directly in to the half nut using a lower temp alloy, or a machine epoxy like is used to build up the sliding way surfaces of machine tools during rebuilds. Moglice? Then use them to make the parts you need.
All is not lost!
I assume you mean in the leadscrew? That's an interesting approach I hadn't considered. I guess I could also 3d print one and use lost pla to cast one out of bronze, then cut a proper one out of cast iron.
I did speak with Frank, told me he sells used half nuts for $500. I heard a supersonic crack come from my spinchter on that one. May still be my only option. Not sure if I'll be able to clamp down on that half nut reliably enough to cut some internal threads. Might be my best option. I'll make sure to take some dimensions from it so I can make a new one. Just my luck I need the part that needs replacement to make the replacement part.
Pyrex: Do you have an inch leadscrew or is it metric? I have a 13" x 36" Clausing/Colchester that needed a half-nut years ago. My lathe came from a shop class in a school that had been wrecked. the half-nut had been cobbled in its repair. I needed a new half-nut. Like you, the company in Michigan wanted $500.00 for a new one, this was about 20 years ago. I purchased a piece of cast and fabbed a new one on a friends lathe. I made it big enough for two and split it to make one half-nut for myself. My leadscrew is 1.125 dia. x 6 T.P.I. If yours is metric, this probably wont do you any good. I would take $100.00 shipping included, if someone can use it.
JH
Leadscrew is in remarkably good condition. The reason my nut is damaged is because someone pulled the engagement handle off and reattached it incorrectly so it was only half engaged on the threads.
Pyrex: I have replied to your Private message, but not sure if it went thru. Let me know if you didn't get it.
JH
Hey Pyrex , as long as you are working on the lathe how are you sight glasses ? Dirty and unclear ? I am getting some for my 13" Colchester that look like originals , my sight glasses are 1.5" OD , the ones I am getting are new old stock for a decent price. If interested send me a PM. mike
Notice
This website or its third-party tools process personal data (e.g. browsing data or IP addresses) and use cookies or other identifiers, which are necessary for its functioning and required to achieve the purposes illustrated in the cookie policy. To learn more, please refer to the cookie policy. In case of sale of your personal information, you may opt out by sending us an email via our Contact Us page. To find out more about the categories of personal information collected and the purposes for which such information will be used, please refer to our privacy policy. You accept the use of cookies or other identifiers by closing or dismissing this notice, by scrolling this page, by clicking a link or button or by continuing to browse otherwise.