Machinery's Handbook, 31st Edition
Standard Tapers 1025 Table 12. American National Standard Plug and Ring Gages for Steep Machine Tapers ANSI/ASME B5.10-1994 (R2013)
L
L
A ”
A
C ”
A
Gage Line
Gage Line
Class X Type Gage
Class Y & Z Type Gage
B
L
L
A
A ”
A
A ”
Gage Line
Gage Line
Class X Type Gage
Class Y & Z Type Gage
Tolerances for Diameter A b
Length Gage Line to Small End L
Overall Length of Gage Body B
Diame ter at Small End a A ′
Taper per Foot a (Basic)
Diameter at Gage Line a A
Dia. of Opening C
No. of Taper
Class X Gage
Class Y Gage
Class Z Gage
5
3.500 3.500 3.500 3.500 3.500 3.500 3.500 3.500 3.500 3.500 3.500 3.500
0.500 0.00004 0.00007 0.00010 0.2995 0.625 0.00004 0.00007 0.00010 0.3698 0.750 0.00004 0.00007 0.00010 0.4401 0.875 0.00006 0.00009 0.00012 0.4922 1.000 0.00006 0.00009 0.00012 0.5443 1.250 0.00006 0.00009 0.00012 0.7031 1.500 0.00006 0.00009 0.00012 0.8438 1.750 0.00008 0.00012 0.00016 1.0026 2.250 0.00008 0.00012 0.00016 1.2839 2.750 0.00010 0.00015 0.00020 1.5833 3.500 0.00010 0.00015 0.00020 1.9870 4.250 0.00010 0.00015 0.00020 2.3906
0.6875 0.8750 1.0625 1.3125 1.5625 1.8750 2.2500 2.5625 3.3125 4.0000 5.1875 6.3750
0.81 0.30 1.00 0.36 1.25 0.44 1.50 0.48 1.75 0.53 2.06 0.70 2.44 0.84 2.75 1.00 3.50 1.00 4.25 1.00 5.50 1.00
10 15 20 25 30 35 40 45 50 55
60 6.75 2.00 a The taper per foot and diameter A at gage line are basic dimensions. Dimensions in Column A ′ are calculated for reference only. b Tolerances for diameter A are plus for plug gages and minus for ring gages. All dimensions are in inches. The amounts of taper deviation for Class X, Class Y, and Class Z gages are the same, respectively, as the amounts shown for tolerances on diameter A . Taper deviation is the permissible allowance from true taper at any point of diameter in the length of the gage. On taper plug gages, this deviation may be applied only in the direction that decreases the rate of taper. On taper ring gages, this devi ation may be applied only in the direction that increases the rate of taper. Tolerances on two-deci mal dimensions are ± 0.010.
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