① honing the workpiece mounting in the Heng bed workbench or fixtures, with several the Whetstone bars honing head insert processing The hole, driven by the machine tool spindle rotation and axial reciprocating. Whetstone article to a certain pressure in contact with the hole wall, i.e. Can be cut very thin layer of metal. The honing head spindle generally into floating joins. ② honing head mechanically pressurized pneumatic or hydraulic automatic voltage regulator several kinds. Shown in the figure, the honing head is mechanically pressurized Type, the actual production of a multi-purpose hydraulic regulator.