stroker
#11
RE: stroker
ORIGINAL: Denny Carlton
Whats the different between regrind and new? Is it that they use a bigger cam and grind it down to fit our car.
Whats the different between regrind and new? Is it that they use a bigger cam and grind it down to fit our car.
Billet Cam: This is the term for a camshaft made from a solid piece of cast iron or steel bar. 99% of steel camshafts are made this way.
Regrind: Term used when a worn camshaft is reprofiled to the same profile or modified to a different profile. To achieve this the bulk of the shaft may need undercutting to keep the base circle above the shaft diameter.
Rockwell Hardness: The type of hardness testing used to check the hardness of most hardened materials. Rockwell C process uses 120deg diamond with a weight of 150kg. of preload on it. This is loaded into material, and depth of the indent is measured . The result of this is given in a Rockwell C measurement.
Flame Hardening: This is a hardening technique using oxy/acetylene torch to heat a camshaft to a cherry red which is then quenched in a water based coolant.
Induction Hardening: An electrical process of heat treating, where a camshaft is passed through a coil, through which a high frequency current is passed. The camshaft inside the coil is quickly heated to a cherry red and quenched in oil. Ivan Tighe Engineering hardens all new camshafts using this process.
Here's the source of the above: http://www.tighecams.com.au/camtypes.htm
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