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Scrumpy	31/01/2017 15:17:01
152 forum posts	help required I wish to make a new half nut for my Boxford Cud Lathe the lead screw is 8 tpi , I have been offered a acme tap of 8 tpi X 5/8 does anybody now what dia the lead screw is as I'm unable to measure mine as I'm away for a few days holiday thanks in anticipation
Brian Wood	31/01/2017 15:59:12
2742 forum posts 39 photos	It could be 3/4 inch diameter. Best to check before launch I think. Brian
John Stevenson	31/01/2017 16:45:35
5068 forum posts 3 photos	Also check whether RH or LH Don't know about Boxfords but Myfords are LH
Saxalby	31/01/2017 17:35:05
187 forum posts 33 photos	My Boxford ME10a is 3/4 inch RH leadscrew.
John Reese	31/01/2017 17:39:14
1071 forum posts	Years ago I had a large lathe with the half nuts worn out. I made a fixture to hold the half nuts in the correct orientation on the lathe faceplate. I welded up the half nuts with cast iron rod, then annealed them for machinability, remounted them on the fixture and single-pointed the threads. If you single point them you don't have to find a tap.

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