M-14MMitutoyo operates a policy of continuous improvement that aims to provide the customer with the benet of the latest technological advances.Therefore the company reserves the right to change any or all aspects of any product specication without notice.ScaleIndenterTest force ApplicationADiamond588.4NCarbide, sheet steelCase-hardened steelSteel (100HRB or more to 70HRC or less) D980.7NC1471NFSphere of1.5875mmdiameter588.4NBearing metal, annealed copperBrassHard aluminum alloy, beryllium copper, phosphor bronzeB980.7NG1471NHSphere of3.175mmdiameter588.4NBearing metal, grinding wheelBearing metalBearing metal E980.7NK1471NLSphere of6.35mmdiameter588.4NPlastic, leadM980.7NP1471NRSphere of12.7mmdiameter588.4NPlastic, leadS980.7NV1471N■Relationship between Rockwell/Rockwell Supercial Hardness and the Minimum Thickness of a Specimen■Rockwell Hardness Scales■Rockwell Supercial Hardness ScalesScaleIndenterTest force Application15-NDiamond147.1NThin surface-hardened layer on steel suchas carburized or nitrided30-N294.2N45-N441.3N15-TSphere of1.5875mmdiameter147.1NSheet of mild steel, brass, bronze, etc.30-T294.2N45-T 441.3N15-WSphere of3.175mmdiameter147.1NPlastic, zinc, bearing alloy30-W294.2N45-W441.3N15-XSphere of6.35mmdiameter147.1NPlastic, zinc, bearing alloy30-X294.2N45-X441.3N15-YSphere of12.7mmdiameter147.1NPlastic, zinc, bearing alloy30-Y294.2N45-Y441.3NRockwell hardnessRockwell Supercial hardnessRockwell hardnessMinimum thickness of specimen (mm)Minimum thickness of specimen (mm)Minimum thickness of specimen (mm) 10 20 30 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 20 30 40 50 60 70 80 90 1001.


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