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Shotpeening???
Posted: Tue Feb 07, 2006 2:15 pm
by buffly
May be a silly question, but i just bought a crank and rods for my 325 that have been "shotpeened"??? Not sure about the spelling, but can anyone give me a clue as to what it means??? Ta muchly!!!
Posted: Tue Feb 07, 2006 5:05 pm
by Turbo-Brown
Means they've had hard little balls of metal (shot) blasted at them to hammer out imperfections in the surface (peen).
Should make them more resistant to fatigue I believe
Posted: Tue Feb 07, 2006 11:36 pm
by bigkev
yes it compresses the surface making the metal denser and removes any minute imperfections that might entually open up as a crack or potentially fatal flaws
Posted: Wed Feb 08, 2006 5:20 pm
by jaistanley
As cracks in metal normally propogate from minute surface imperfections and cracks, this proccess shuld make your crank a lot less likely to snap/crack.
All balanced up too is it? Seems likely if the last owner went to the trouble of having it shot peened.
Nice one.
Jai
Posted: Wed Feb 08, 2006 8:04 pm
by dannosail
Shot peening also increases the surface hardness of the metal without hardening the component all the way through and running the risk of making it brittle.
Posted: Fri Feb 10, 2006 5:56 pm
by buffly
Thanks fellas, at least now i know what it means!!