Master Setting Ring gauges are ideals for setting bore measurement instrument. Features: Manufacturing Range : 4.00 mm to 500 mm. Material : OHNS , En 31 Alloy steel. Blank Design as per IS 3485 1983. Gauging practice as per IS 3455 1971. Are ground and precision lapped after a heat treatment process which includes subzero stabilization cycle to ensure dimensional stability. Calibration under standard room temperature at 20 degree celsius on carl zeiss,Horizontal Metro scope which is traceable to National Standards.
