Ring gage and Master Disc Tolerances per B89.1.5

Tolerances, Engineering Design & Limits & Fits

The table defines Ring gage and Master Disc mechanical tolerances per B89.1.5-1998 (R2009) Measurement of Plain External Diameters for Use as Master Discs or Cylindrical Plug Gages

Gage Tolerance Chart ANSI/ASME B89.1.5 Inch Units
Diameter Range
XXX
XX
X
Y
Z
ZZ
.010 - .825
.000010
.000020
.000040
.000070
.0001
.0002
.825 - 1.510
.000015
.000030
.000060
.000090
.00012
.00024
1.510 - 2.510
.000020
.000040
.000080
.00012
.00016
.00032
2.510 - 4.510
.000025
.000050
.0001
.00015
.0002
.0004
4.510 - 6.510
.000033
.000065
.00013
.00019
.00025
.0005
6.510 - 9.010
.000040
.000080
.00016
.00024
.00032
.00064
9.010 - 12.010
.000050
.0001
.0002
.0003
.0004
.0008

 

Gage Tolerance Chart ANSI/ASME B89.1.5 Metric Units mm
Diameter Range
XXX
XX
X
Y
ZZ
.254 - 20.96
.00025 .00051
.00102
.00178
.00254
.00508
20.96 - 38.35
.00038 .00076
.00152
.00229
.00305
.00610
38.35 - 63.75
.00051 .00102
.00203
.00305
.00406
.00813
63.75 - 114.55
.00064 .00127
.00254
.00381
.00508
.01016
114.55 - 165.35
.00084 .00165
.00330
.00483
.00635
.01270
165.35 - 228.85
.00102 .00203
.00406
.00610
.00813
.01626
228.85 - 305.05
.00127 .00254
.00508
.00762
.01016
.02032

Tolerance Notes:

Cylindrical Ring Gage Go Member is to the minus side, Nogo Member is to the plus side.
Cylindrical Plug Gage Go Member is to the plus side, Nogo Member is to the minus side.
Master Gages Tolerance is split 50/50 or Bi lateral Equal

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