Generally PASS punching tools are made of special alloyed steel to fullfil the highest punching demands.

Furthermore we attach great importance to a high quality hardening process by repeated  temporing and deep-freeze subsequently.
This process guarantees an extremely high hardness with an outstanding  wear resistance of our punching tools.

Associated with modern production methods (grinding of the cutting edges with special grinding  wheels)  we can ensure that the wide range of different sheet qualities can be punched up to 1.600 N/mm² - no matter if it concerns mild alloyed aluminium, mild steel, stainless steel or spring band steel. 

A high punch hardness as well as an excellent grinding surface are important in order to counteract the problem with edge build-up.

This newsletter will inform our customers of our latest research results concerning modern variation of coatings in order to get a better understanding regarding these problems. Tests show us that the well-known TICN coating is  a good coating to increase the lifetime (especially working with stainless steel).  However, the problem of material build-up on the edges have not really been counteracted.

Built-up edges are known especially when working with
-    zinced steel
-    aluminium sheets
-    copper sheets

After specialized tests at PASS Stanztechnik AG the below mentioned coatings turned out to be the most successful coatings:

A-MAX coating		C-MAX coating		T-MAX coating
for dry processing with aluminium sheet		for working with copper		for working with galvanized sheet

Our technical sales staff working daily with these situations are please to answer any questions you may have.