A. Before punching, ensure that your punch stem and coupling nut are properly tightened and holding the punch securely.
B. Use keyways if available on shaped tools for proper alignment.
C. Tighten the die in the die pocket with the set screw.
D. Be sure the stripper is installed and properly positioned before punching.
E. Lubricate when possible.
F. Clearance.
G. Be sure that you have enough tonnage for your application.
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