>> P.128
4-1TechnicalTerminologyOtherContactmodulusCoefficientdeterminedbytheballdiameterandcurvatureradiusContactellipseGrooveradiusGroovecurvatureAreaanditsshapewheretheballandracewaysurfaceareincontactCurvatureradiuswithintheaxialplaneoftheracewaygrooveRacewaygroovecurveshownasaratioofthegrooveradiusandballradius128
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