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Old 11-14-2008, 09:30 AM
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Can a radius be added to a crank?

Just had an 1182 crank ground .010/.010, but the guy left VERY LITTLE radius on the journals. Can one be added, w/out grinding it down to .020/.020 or farther?

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Old 11-14-2008, 09:54 AM
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It could be done without a regrind, but you run the risk of ending up with too much rod side clearance as a result,because of having to go side to side to blend in to the cheeks of the journal, as opposed to grinding into the journals themselves to accomplish this!
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Old 11-14-2008, 10:01 AM
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The radius has to be on his crankshaft grinding wheel. Normally you need to take a little bigger cut than just .010 to get a good radius on the crankshaft.



I've ground some .030 just to get a good filet on it.
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Old 11-14-2008, 10:34 AM
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Thank you very much!!!
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Old 11-14-2008, 10:59 AM
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Quote:
Originally Posted by flyin99
Just had an 1182 crank ground .010/.010, but the guy left VERY LITTLE radius on the journals. Can one be added, w/out grinding it down to .020/.020 or farther?
The first answer is no, a new radius would have to be formed by reducing journal diameter.

However, there is another solution seldom used except by Chrysler. That is instead of a radius, the intersection point of the journal and cheek is pressure grooved. A small roller under high pressure is fed into this area to compress the metal into what's called a rolled fillet. This is, needless to say, a somewhat expensive process that can only be accomplished by a few pro race crank builders.

Bogie
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