Restoring old lathes, backlash in leadscrews

[irving2008]

Think its just the camera angle John, tho its hard to tell... The calipers are in the garage now and can't be assed to go get them, but it looks fairly even - cetrtainly not 1.5mm wear's worth!

Can't find a 3/8 x 8tpi LH tap anywhere... and quoted $201 to have one made! So thats not going to happen then...

The threads inside the brass block, if they were ACME square top originally are very much triangular now... so much so I wonder if they were ever ACME - well after 85 years a bodge or two wouldnt surprise me... but as you say John, maybe not worth bothering with, althopugh cutting the block 1/3 way downwould not be hard to do

Replacing them with 3/8 x 10tpi LH as per Myford had occured to me, I can get a tap from RDGTools as mentioned, but where can I get a die?