Gallery, Projects and General > How do I??
Cross slide replacement nut
philf:
Phil,
Delrin nuts can be moulded to fit the screw perfectly. I have seen the process on the web.
A friend of mine made a lathe around 50 years ago with a Delrin nut and when he got rid of the lathe many years later there was little sign of any backlash. He then bought a Hardinge capstan lathe and proceeded to make a carriage with cross and top slides. He bought a metre of fairly cheap rolled trapezoidal screw. He used a few inches of the spare screw to make a tap to machine the threads.
Phil.
chipenter:
The club I belong to has a Raglan Little John mk 1 that has spare cross slide lead screws and nutts with a shop made tap , I could mesure thees when I go there Wednesday iff that is any help .
Pete.:
--- Quote from: philf on March 23, 2018, 02:33:50 PM ---Phil,
Delrin nuts can be moulded to fit the screw perfectly. I have seen the process on the web.
--- End quote ---
I've made a couple. Takes a couple of tries to get it right and you need to be patient when heating the screw but it does work and well.
appletree:
--- Quote from: chipenter on March 23, 2018, 03:05:38 PM ---The club I belong to has a Raglan Little John mk 1 that has spare cross slide lead screws and nutts with a shop made tap , I could mesure thees when I go there Wednesday iff that is any help .
--- End quote ---
Hi Chipenter
Thanks for the offer, but sadly the mk1 and mk2 are 1/2 od and 10 tpi, I know I had to gift my MK2 to my son to get permission for the 5 inch to come through the door! I could have fought and paid the price later, but the vacated space was the space I needed lol
Phil
nrml:
Make an 'Evanut'. From all accounts, it should be a lot easier to make and should outperform metal nuts of any description. http://bbs.homeshopmachinist.net/threads/43645-Making-Acetal-leadscrew-nuts-the-easy-way
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