(5.1cm ) - 5.1cm Carbide Indexable End Mill, R8 Shank, with 3 Pc Tpg 322 Inserts, 0046-0916

What is the shank diameter?

What rpms have people been running this at? i have found suggestions on pm ranging from 250, to 2200... makes no sense...

How many thousandths cut (per pass) can one take when using this tool on various metals.

is the bore head adjustable?