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Old 07-18-2007, 09:51 PM
nuch_ss396 nuch_ss396 is offline
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Default Correct crankshaft terminology

I have a question regarding crankshaft terminology and I'd
like to hear your opinions.

As we all know, originally there were cast & forged crankshafts available
from the factory. Cast cranks are obviously just that - cast.
Forged crankshafts start life as a rough casting, then go
through the forging process to compress the steel and make
it inherently stronger. So, is it correct to refer to
forged crankshafts as a casting ( eg. this crankshafts casting
number is '7115 ), or should that '7115 be the forging number?

For those that know, are the part numbers on the forged
cranks ( eg. 6223, or 7115, or 7118 ) originally cast in to
the rough castings, or added during the forging process?

I often hear people refer to casting numbers when they refer
to forged crankshafts. I just want to know if this is correct.

Obviously, neither of these variants take into account billet
crankshafts. But they are another topic altogether.

Steve
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