punch life in aluminum?

[514761974]

I am looking for imformation on recomended pierce punch (non-shear)life before sharpening. Punch is approx. .500" X .125" through .125" aluminum heat treated to 47. I recomended a study to figure this out and was told someone should know.But of course no one there did.

 

[ornerynorsk]

Could you explain what "non-shear pierce" would entail? This is a contradiction in terms.

 

[TVP]

In addition to ornerynorsk's question, please provide more information regarding the heat treating. What does 47 mean? Hardness? Tensile strength?

 

[514761974]

Thank You for responding I have since found out that I can expect approx. 70000 cycles depending on lubrication methods. thanks again for the responses.