Completed repairing the Harrison L5 cross-feed nut:
Boring out the old one.
Centred by threading the nut onto the full-thread portion of the tap and clamping that by its own centre-holes between centres. Then gently aligning the vice and clamps to match.
I made the vice very many years ago to fit the vertical slide of my EW lathe, and by sheer chance it matches the Myford's T-slots!
The boring bar is one of a Hemingway Kit set I made a few years ago, and this was its first use! I had to drill the extra hole in the Myford catch-plate to take its carrier, wider diameter than the slot width.
Truing the new threaded sleeve (leaded gun-metal) to the leadscrew. Lacking an outer-end centre I needed centre it in the independent 4-jaw chuck. The left-hand thread enforced a left-hand tool set upside down, and running the lathe in reverse…. very carefully, modest speed, fine feed, 0.005" cut.
Finally, I sweated the sleeve into the nut block, and re-assembled the lathe.
Oddly, the tightest part of the thread, which I am sure is ACME after all, is not at its far end as expected but a little way back.
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….
Then light relief.
A chance skip find: a hefty leg apparently from a broken-up table, consisting of two 4-limbed cast-iron "spiders" joined by a tubular steel column about 70mm diameter.
The use was obvious immediately: a mobile stand for the bench-grinder in my increasingly cramped workshop.
Add a piece of ex-pallet 12mm plywood, 4 castors, a few fasteners and some exterior-grade dark wood varnish found in the kitchen cupboard, and there we are. Just sufficient room to add a drill-grinding jig, too!
By serendipity, the PCD of the inner holes in the arms even matches the centre-distance of the 2 in the grinder's base, nearly enough for M8 bolts helped by slightly enlarging the cast-in arm holes a little.