MECHANISM OF MEASURING DISPLACEMENTS OF LOADING SHAFT OF ROCKWELL HARD NESS METERS

摘要

PURPOSE:Both ends of a pivot shaft fixed to the base end of an expanding lever abutting on the top end of the loading shaft of a Rockwell hardness meter is supported by way of bearings to the main unit of the hardness meter to decrease friction moment, whereby measurement of displacements of the loading shaft can be stably made at high accuracy.