The operator stopped the spindle after a tool hit the vise jaw at low rpm. It still turns and holds a taper, but there is a new low rumble at speed and a fine vibration in a finish face. No load meter alarm.
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A rumble that was not there before a crash is a bearing or a pulled tool interface until someone proves otherwise. Do not finish a customer's face on it while you decide. Run a test bar or a ground arbor in the taper and indicate it at two heights.
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Questions and answers were written on this account when they were published.
If the arbor sweeps more at the far end than at the gauge line, the spindle is bent or the bearing is brinelled. That is a pull-the-cartridge job, not a warm-up.
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Questions and answers were written on this account when they were published.
If the arbor is true and only the face is marked, look at the tool holder that crashed. A dinged taper in the holder copies a rumble into a good spindle.
Forum posts from Zoryra Forum.
Questions and answers were written on this account when they were published.
