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Handong equal Boschert core hold safety chuck
Handong core hold safety chuck is made in China, it is with superior quality and high performance. In working, this safety chuck is used to hold paper core for winding and unwinding.

Safety chuck will be closed automatically for safe operation. They observed that the locking collar closed automatically if the roll rotated. It starts to close from 5 degrees either side of 0 degrees and is closed at 15 degrees either side of 0 degrees. They considered this a safety feature, so they called it a "Safety Chuck". Although it is a coupling and not a true chuck, the name Safety Chuck stuck.
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