Agroshield
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...how many workpieces have been ruined by ER-mounted cutters pulling themselves into the part...
Given that the ER system is widely used in industrial/production/making money machining, it is unlikely that there is an inherent fault in the system.
Industrial users would buy chucks, collets and nuts to a known standard, rather than Amazon specials, which may contribute to their success with it. They will also know the correct torque for the securing nut.