Crankshaft repair

[carl hinkson]

Dougy Rowe turned into a bad guy, Callies and Bullet cams offer crank repair as well.

[joespanova]

Originally Posted by carl hinkson

Dougy Rowe turned into a bad guy, Callies and Bullet cams offer crank repair as well.

They don't do chrome.......

[SSDiv6]

Speak to Nick Boes at Shaftech.
He specializes in doing repairs that others can't.

[joespanova]

Originally Posted by SSDiv6

Speak to Nick Boes at Shaftech.
He specializes in doing repairs that others can't.

Thanks

[Alan Roehrich]

It really is not necessary to chrome a crankshaft these days. Chroming was commonly done when it was much harder and more expensive to nitride a crankshaft, only big corporations had access to it. When you grind a crankshaft, especially if you have done a repair, once you grind it very much, you grind through the nitriding, and in some cases, the heat treating. You end up with a journal surface that is not real hard, it won't get quite as slick, and it will be more vulnerable to debris and sticking. You don't want the entire crankshaft hard all the way through, but you really need to get the surface hard. Chroming a crank merely makes the surface hard, and there is a risk of hydrogen embrittlement. These days, most good crankshaft repair businesses have access to both heat treating and nitriding.

[SSDiv6]

Originally Posted by Alan Roehrich

It really is not necessary to chrome a crankshaft these days. Chroming was commonly done when it was much harder and more expensive to nitride a crankshaft, only big corporations had access to it. When you grind a crankshaft, especially if you have done a repair, once you grind it very much, you grind through the nitriding, and in some cases, the heat treating. You end up with a journal surface that is not real hard, it won't get quite as slick, and it will be more vulnerable to debris and sticking. You don't want the entire crankshaft hard all the way through, but you really need to get the surface hard. Chroming a crank merely makes the surface hard, and there is a risk of hydrogen embrittlement. These days, most good crankshaft repair businesses have access to both heat treating and nitriding.

Alan is correct.
What I like about Shaftech is in addition to their great maching, they also offer Nitriding, and other propietary processes such as their Omicron surface coating.

They do crankshaft finishing for many NASCAR, Comp and Pro Stock teams and Callies sends their high end crankshafts to Shaftech.