Do you remember when I said that an 0.2mm end mill was going to be fragile?
I had my feed rate set to about 3 inches per minute with about 10,000rpm of bit speed. (I normally use 5-8 inches per minute for the 0.2mm 60 degree vbits as a comparison.)
It made one isolation cut and then snapped off. The cut (while it lasted) was ubber small and would be great for SMT work. <sigh>
Dinner is almost ready so that will put a temporary stop to my work. Maybe after dinner I will try a 0.2mm 30 degree vbit.
73 de NG0R