Spent some time getting the new leadscrew and Mounting boss to a point of almost (75-80%) finished.
Original cross slide feed screw (top) Vs New cross slide feedscrew taking into account the full backwards travel of the cross slide after the saddle modification.
Both are 3/8 20 L/H. Using a die for that thread was entertaining.... Not often I create a "backwards" (left hand) thread using a die and I have all the fun of making a new feed screw nut and using the left hand tap to come yet!
The Part finished carrier boss and the cap blank
Yes, that is threaded, it is M34x1mm fine pitch. Easier to get a metric die than faff about single pointing it.
Finally, all the parts together.... I will get these finished next week.
The spigot to the right of the threaded section on the carrier boss is only there as a way to mount it using my collet faceplate, the same with the cap blank. They are both part of the material they were turned down from (2" 6082 T6).
Looking at the new feed screw, from right to left, there is:
Imperial 50 division dial
Bearing race washer (feed screw to be machined so this is a tight sliding fit)
Gap (where bearings would be)
Bearing race washer. (feed screw to be machined so this is a press fit)
Boss between the two races
Bearing Race Washer (press fit)
I have the other bearing race washer, however, I need to skim the feed screw shaft down to a tight sliding fit for that one.