Quote Originally Posted by WESTERNAERO View Post
Nice job Bob. The only thing I would change about what you said is metric threads aren't designated by threads per millimeter per say. Metric thread pitch is a crest to crest measurement. So a 13mm x 2.0 means the threads are spaced 2.0mm apart. Multiply .75 by .03937 is .0787", so your feed rate on a lathe would be .0787.
How about 2.0 mm divided by 25.4 = .07874 or 25.4 X .07874 = 2mm.


Math Question: What is the square root of "69"??? Eight (Ate) Something... 8.3066