Crankshaft Welding

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May 2, 2006 | 07:23 AM

#31

OldSStroker

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Joined: Oct 2002

Posts: 2,931

From: Upstate NY

Re: Crankshaft Welding

Quote:

Originally Posted by Kyrasis6

I will say yes Diamond Like Coatings (DLC) can be used on almost any application where friction and wear are a concern. The technology has advanced enough to be used on practically any application including high impact.

"may not say much" more like under contract to say nothing.

There is multiple sources for anything in the racing industry as there is in almost all industries.

If you want to DLC coat a part as the company about the application and see what they recommend, they will know best.

Edit: DLC coatings are usually between 2-5 microns thick (.000002"-.000005")
http://www.applieddiamondcoatings.co...teristics.html

Thanks for the update. A lot more information has surfaced about DLC and related coatings and how they are being used in race engines. One coater said that DLC coated cranks were run in some Nextel Cup engines during 2005 races. These may have been plate races. Cranks flex measurably so the coatings probably had more flexible layers under the top DLC layer.

Bekaert (Sorevi) has been DLC coating piston skirts on some F1 engines. Hendricks claimed (2005) to be using DLC on Cup engine lifters but not cams. I believe some lifters have DLC on the foot and a different formulation (like Cavidur N) on the OD. One estimate was 20,000 DLC coated cams in use by 2005.

I believe NASCAR has mandated shell bearings remain in the engines, so shell-less DLC coated rods aren't currently allowed. That's probably good from a cost standpoint. Non-round big end bores are tough to make.

Kyrasis6, any information you can "legally" add would be appreciated.

There are undoubtedly many more DLC developments already in use or in test which can't yet become public knowledge.