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My old boss called out my feed rate math and I owe him one
He caught me running a 1/4" endmill at 12k rpm and 40 ipm on 6061, said I was babying it. Dropped the rpm to 8k and pushed feed to 65, cycle time went from 22 mins to 14 on that part, anyone else have a supervisor who knew more than they let on?
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susan3508d ago
Old shop foreman did the same thing to me years back on a stainless job. Told me my SFM was way off and showed me his numbers on a napkin. I was running a 3/8" carbide at 9k, he bumped it to 6.5k and shoved the feed way up. Part came out cleaner and the tool lasted longer than my old setup. Sometimes those old guys have run so many parts they just know the sweet spot without even looking at a chart. I still run my own numbers most days but if a veteran calls something out, I pay attention now.
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