Masters form the base standards when it comes to comparative measurement of components on the shop floor. Master Setting Rings and Discs when calibrated become the basic operational standards in general metal working industry.
Used for setting any kind of internal or external measuring instruments like horizontal comparators, dial bore gauges etc .
Made from oil
hardening non shrinking gauge steel , hardened and
tempered to 60-62 HRC.
Subzero treated at -80ºC for long-term dimensional stability.
Actual dimensions
duly etched
Calibrated at
20ºC under Standards Room Conditions
against Nationally/Internationally traceable masters
Certificate of
calibration is provided along with each master traceable
to national length standards.
Master
Type
Range
Blank
Design
Form
and Size
MSR.
ID
1.5-
315 mm
DIN
2250
Part 1
DIN
2250C
MSD
OD
3-
200 mm
ASME/
ANSI B47.1
ASME B 89.1.5-1998 Form Tolerance Class
X
Size Tolerance Class Y
Plain Plug Gauges
Made from oil
hardening non shrinking steel hardened and tempered
to 60-62 HRC
Sub zero treated
at - 80C for size stability
Calibrated at
20 degrees centigrade under standards room conditions
Range
Blank
Design
Form,
Surface Finish and Size Tolerance
OD
3- -40mm
For 'GO'
DIN 2248-1 Type Z
For 'Not Go'
DIN 2249-1, Type Z (shorter length )
Size and Form tolerance DIN 7162 Surface
finish
DIN 2239 class 2
