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Thread Part Of The Punch Crack
Tel:+86 555 5207358/5207359  E-mail: sales@tenroy.com

Problem: Thread Part Of The Punch Crack


Reason & Solution


A. Punch threaded shank hardness is too high, not properly annealed---Make correct annealing of screw shank

B. Punching pressure exceeds the punch force---Punch edge adopt oblique cutting or change a large station to punch

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