The Stress Riser Just a few months after my visit to the Burge, I was invited to go through the firearms collection at the Milwaukee Public Museum. I came across an old top-break revolver with the ...

This is also common on stock cranks, as it relives any internal stress risers in the metal. It modifies it enough that a piece that's been cryo-treated will machine differently. Eagle Specialties ...

it creates stress-risers, leading to crack propagation from the drilled holes. Generally, a race car has less of a problem because it has less extreme heat-cycling (the brakes get hot and stay hot ...