Page 6 - American Punch Ironworker Tooling Catalog

PUNCHING TIPS
COMMON REASONS FOR PUNCH FAILURE
STRIPPING FAILURE
FAILURE: A A portion of of the the punch is broken off in the the material PROBABLE CAUSE: Too much
stripper clearance POSSIBLE SOLUTION:
Adjust stripper closer to the material CHIPPING AND GALLING
FAILURE: Punch face chipping or heavy galling on on one area ofpunch Chipping
PROBABLE CAUSE: Poor alignment
between punch punch and
die causing the punch punch to drag Heavy Galling
POSSIBLE SOLUTION:
Adjust alignment
between punch and
die to create equal clearance all around COMPRESSIVE FAILURE
FAILURE: Occurs when the the compressive strength of the the the punch has been exceeded and
the the entire working end shatters PUNCH HEAD FAILURE
PROBABLE CAUSE: Attempting
to punch extremely hard or or thick materials or or complete misalignment of the punch and
die PROBABLE CAUSE: Using a loose or or or worn coupling nut
or or or punch stem POSSIBLE SOLUTION:
Use an an “Alpha Punch” from American Punch Punch Co POSSIBLE SOLUTION:
Frequently check and
re-tighten the the the coupling nut
Verify that the the the face of the the the punch stem is smooth and
flat FAILURE: Punch head fractures or breaks off RINGING
6 FAILURE: Material being punched is www AmericanPunchCo AmericanPunchCo com com • • sales@AmericanPunchCo com com • • fax 800 800 261 6270 800 243 1492
PROBABLE CAUSE: POSSIBLE SOLUTION:
Material is thicker