I'm considering renewing the crossfeed screw and nut on my new/old shaper. I'm considering using Errol Groff's method for renewing the screw. He purchased ACME threaded rod and cut it to the length of the threaded portion of the feed screw, then bored and reamed one end to a 3/16x1" hole. Then he cut off the worn threaded section of the feed screw, leaving 1" of the threads, then turned down the threads for a press fit and pressed on the new threads. This for a 16" South Bend, seems hard to believe it would hold up but if it didn't a little brazing would cure it.
The shaper's cross-feed nut looks somewhat like this one:
I'm thinking of purchasing a cylindrical nut and turning it down to make a bushing threaded on the ID. I'd then bore out the worn threads on my cross-feed nut for a slip fit over the nut, then silver solder the new threads in.
I'm planning to buy the parts from Green Bay Manufacturing Co. but they have multiple parts that would work for what I'm planning. For example, they carry rolled 5/8-10 LH ACME rod in both 4140 and 1018, and they carry 5/8-10 LH ACME nuts in bronze, gray iron, and 12L14 steel.
Is this a good way to go, and which material should I use?
In case I decide to make it, does anyone have a 5/8-10 LH ACME tap they might be willing to loan me?
Grant Erwin