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Old 11-05-2005, 05:20 PM
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Chromed crank?

Has anyone ever heard of chroming a crank?

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Old 11-05-2005, 05:35 PM
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what for , you can;t see it
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Old 11-05-2005, 05:45 PM
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I know it was popular back a few years as a means of finishing the journals on an offset/welded crank.Thats where the company Chrom-a-Shaft got it's name.With the quailty of racing crankshaft materials today along with dedicated forgings for large strokes,I think the process has past it's usefulness.
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Old 11-05-2005, 05:50 PM
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My current engine combo in progress is 415 hp, I was told by one person to chrome the crank for 40 more hp. Sounds way too much money for the end result. Then agian this person has never really built anything that has amounted to much. (Guess always consider the source).
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Old 11-05-2005, 05:59 PM
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Quote:
Originally Posted by steve t
what for , you can;t see it
i guess you are talking about hard chroming, my mistake
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Old 11-05-2005, 06:07 PM
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You don't chrome a crank and if you did it wouldn't make 40 more HP. In fact it wouldn't turn as your clearances would be off.
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Old 11-05-2005, 06:10 PM
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Sure sounds good to me. If I knew, I wouldnt have posted the question.
So what do they mean when they talk of chroming a crank?
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Old 11-05-2005, 07:48 PM
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A crankgrinder told me about it in 1979,I was dropping off a crank for a tractor and he said he was doing alot of them.He said that he ground the journal undersize,then chromed it to oversize and then ground it to the finish size.I think he chromed only the journal to get a better finish but I didn't look at one.
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Old 11-05-2005, 07:53 PM
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There is a company in Charlotte that has chromed cranks for compressors for years. They dimple the crank journals, polish down any high spots and then they chrome them. They claim the dimples hold some oil to create a heavier barrier between the crank and bearings. But I think this is used strictly for industrial applications.

Dave
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Old 11-05-2005, 08:24 PM
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Thanks, guess I'll tell him have it with his own engine. Heck theres plenty of things (tried and tested) that I could do for 40hp.
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Old 11-05-2005, 08:29 PM
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Scored cranks can be repaired by hard chroming them.
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Old 11-05-2005, 08:33 PM
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chroming a crank

Put your money to more practical uses, like balancing your engine.
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Old 11-05-2005, 08:45 PM
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Scored cranks are welded and then reground.
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Old 11-05-2005, 08:55 PM
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The only reason to hard chrome a crank is to repair a scored journal.

http://crankshaftspecialist.net/services.html

Last edited by 56Maynard; 11-05-2005 at 09:06 PM.
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Old 11-06-2005, 12:37 PM
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Quote:
Originally Posted by Rick WI
You don't chrome a crank and if you did it wouldn't make 40 more HP. In fact it wouldn't turn as your clearances would be off.
LOL........LOL...
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