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Bearings may be sent to coaters for moly-graphite treatment.
The buildup of anti-friction coating is so minute that additional clearance compensation isn’t usually required.
Cam bearings (such as these from Dart) are available pre-coated, or you can send your cam bearings out for coating.
If you send bearings out for coating, don’t forget the thrust bearings. This anti-friction coating will also benefit the thrust surfaces. These thrust bearings were coated by PolyDyn.
A moly-graphite skirt coating will extend the life of both skirts and cylinder walls, serving as an anti-scuff protectant. This piston skirt was coated by Calico.
An example of Dart’s in-house coating. These pistons were treated to a moly-Teflon coating on the skirts and a high-temperature reflective heat barrier coating on the domes.
Here’s a set of slugs with only the domes coated with a heat barrier treatment. When it comes to pistons, you can have the domes or skirts coated, or both.
All of the coating shops offer both thermal barrier dome coating and anti-friction skirt coatings. This example is from PolyDyn.
Swain Tech Coatings offers an extreme-temperature gold coat specifically designed for high-temperature/high-pressure turbo, supercharger and nitrous applications.
In addition to piston dome coating, in order to complete the thermal-barrier protection for the combustion area, the same high-temperature heat barrier coating may be applied to the combustion chamber, all valve faces, exhaust valve throats and exhaust valve ports. This chamber (and exhaust port) was coated by Dart.
Tags: ANTI-FRICTION COATINGS, BEARINGS, COMBUSTION CHAMBER THERMAL BARRIER COATINGS, PISTON SKIRT COATINGS, THERMAL BARRIER COATINGS
