This is interesting

kunin35

AzB Silver Member
Silver Member
I was replacing a ferrule and cut a piece off some rod, drilled it, ready to tap when I look and see a void. Anyone else experience this?
 
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I've never seen that!
It's probably cast, and that's an air bubble.
 
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You will often see that if the material is not properly dried or in the 1st few feet of the start of a run of material.
 
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