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Three months fighting with surface finish on 316 stainless
Been running a job for a pump manufacturer here in Tulsa and could not get the surface finish below 125 RMS no matter what I tried. Swapped inserts, slowed down the spindle, even tried a different coolant mix. Finally an old timer from the shop next door told me to try a wiper insert with a 0.031 radius. First pass after that gave me a 63 RMS finish. Has anyone else had luck with wiper inserts for finishing tough stainless?
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angela_park4h ago
Are you running with a pretty light depth of cut on that finish pass? I've found wiper inserts are a game changer for stainless but you gotta dial in the feed rate just right or they chatter something awful. That .031 radius sounds about right though, too big and you'll get nasty vibration. Glad that old timer steered you in the right direction, sometimes the simple stuff is what gets missed.
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