Recess TIR Gage

This gage was specifically developed to measure the concentricity of a screw’s shank to its recess or external drive system quickly and accurately. This fastener characteristic is becoming more critical with the widening use of automatic screw feeding and driving assembly equipment. If a screw’s recess is too far from the axis of its shank the automatic equipment’s driver can not engage the recess and the equipment will jam, ruining its efficiency. This gage’s single recess measuring element will inspect all styles of recesses in all screw sizes #4 through 1/4″ (M3M6).