As far as threaded fasteners are concerned, there are a large number of coatings which can be applied, and in doing so we are generally seeking to address one of a small number of issues, the main ones being: Corrosion- Material incompatibility- Friction- Lack of suitable lubrication In terms of addressing the problem of corrosion, the main candidates come from a list of metallic platings, although polymeric alternatives exist. The common types of plating aimed at limiting or delaying...

In the design of crankshafts we have to incorporate counterweighting for various reasons, either for reduction of bearing loads, or to reduce or eliminate primary couples. Often this is achieved through careful design of the crankshaft and the counterweights are incorporated into the crankshaft. What we aim to do in providing a counterweight is to achieve a certain moment relative to the crankshaft axis. Depending on the configuration of the crankshaft these may or may not be directly...