I skimmed a few thou of my bed today. Largest endmil wouldn't quite reach the front edge so I used a boring head set to a 30mm radius.

It just missed in the top right hand corner but I have to remove another 3 thou anyway to lose an accidental dent I chopped in it several years ago.

Q1: I did the first skim with 4 parallel passes in the X axis, is there an approved, better way?

Q2: I think you cut cast iron dry, but an experimental smear of Rocol RTD seemed to improve the finish somewhat on the first pass. It could just be the tool was blunter for passes 2, 3 & 4. What thinkest thou? :nope:

I put a DTI in a chuck so it revolved around a 4" radius arc, measuring distance to the bed at the cardinal points to make sure it was square. Got .002" difference in the X and .001" in the Y :naughty: