I have some A2Z end mill holders, and live the tool offsets. Greatly speeded up my work with multiple changes. But I am a little leery of the runout of a setscrew style 3/8" and smaller holders? Does anyone make a ER16 collet style holder that one would clamp tool in with the collet, then it screws onto spindle like the A2Z ones? Or is my worry of runout unfounded? I am not doing real precision work, but there seems to me more chatter and less tool life with the A2Z 3/8" running a .250 4 flt end mill.
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