10-08-2012, 03:10 PM
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Get in, sit down, hang on
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Join Date: May 2005
Location: Olds, Alberta Canada
Age: 55
Posts: 2,504
Thanks: 9
Thanked 40 Times in 39 Posts
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Quote:
Originally Posted by BOBCRMAN@aol.com
Can't tell because of angle/clarity of pics. Don't have my crank book with me. Looks like cast.
Rule of thumb. If the parting line on the side of the crank throw is only a line, up to 1/16" wide it is a casting. If the line is 1/4" plus and looks like it has grind marks on it. It is forged.
Stand crank on end, on a shop towel. Rap a counter weight with a hammer. If it goes "thunk" it is cast. If it rings clearly, like a bell, it is a forging.
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Pics and more info fom BBC Parts Interchange Manual.
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