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Regular concave surface profiles are adopted in many friction surfaces. But up to now,this is seldom tutored by the theory of lubrication. To design them, a model of the regular depthoptimization was provided. To determine the other size, two propositions are given. At same time,two main effect factors on lubrication were discussed in detail. A lubrication test for different regu-lar concave surface profiles was performed on a pin and ring tester. On the basis of theory analy-sis and experiment, a principle to design regular concave surface profiles is provided.
To design the other surfaces, both regular positions are are in many friction surfaces. But up to now, this is seldom tutored by the theory of lubrication. To design the other size, two propositions are given. At same time, two main effect factors on lubrication were discussed in detail. A lubrication test for different regu-lar concave surface profiles was performed on a pin and ring tester. On the basis of theory analy-sis and experiment, a principle to design regular concave surface profiles is provided.