Machinery's Handbook, 31st Edition
1016
Standard Tapers Table 2. American National Standard Taper Drive with Tang, Self-Holding Tapers ANSI/ASME B5.10-1994 (R2013)
J
Key Taper 1 3/4 in. per Ft. Optional
K Gage Line
N E
A
J H
G
F
Gage Line M
C
P
O
B
Shank
Tang
Diameter at Gage Line (1) A
Gage Line to End of Shank C
Total Length of Shank B
No. of Taper
Radius of Mill G
Thickness E
Length F
Diameter H
0.239 0.23922 0.299 0.29968 0.375 0.37525
1.28 1.59 1.97 2.56 3.13 3.88 4.88 5.38 6.12 8.25
1.19 1.50 1.88 2.44 2.94 3.69 4.63 5.13 5.88 8.25
0.125 0.156 0.188 0.203 0.250 0.312 0.469 0.562 0.625 0.750
0.19 0.25 0.31 0.38 0.44 0.56 0.63 0.69 0.75 1.13
0.19 0.19 0.19 0.19 0.25 0.22 0.31 0.38 0.38 0.50
0.18 0.22 0.28 0.34 0.53 0.72 0.97 1.20 1.41 2.00 0.13 0.17 0.22 0.38 0.44 0.56 0.50 0.56 0.56 0.50
1 2 3 4 5 6
0.47500 0.70000 0.93800 1.23100 1.50000 1.74800 2.49400
4 1 ⁄
2
Socket
Tang Slot
Min. Depth of Hole K
Gage Line to Tang Slot M
Shank End to Back of Tang Slot P
No. of Taper
Radius J
Width N
Length O
Drilled
Reamed
0.239 0.299 0.375
0.03 0.03 0.05 0.05 0.06 0.08 0.09 0.13 0.13 0.16
1.06 1.31 1.63 2.19 2.66 3.31 4.19 4.62 5.31 7.41
1.00 1.25 1.56 2.16 2.61 3.25 4.13 4.56 5.25 7.33
0.94 1.17 1.47 2.06 2.50 3.06 3.88 4.31 4.94 7.00
0.141 0.38 0.172 0.50 0.203 0.63 0.218 0.75 0.266 0.88 0.328 1.19 0.484 1.25 0.578 1.38 0.656 1.50 0.781 1.75
1 2 3 4 5 6
4 1 ⁄
2
All dimensions are in inches. (1) See Table 7b for plug and ring gage dimensions. Tolerances: For shank diameter A at gage line, +0.002, - 0.000; for hole diameter A , +0.000, - 0.002. For tang thickness E up to No. 5 inclusive, +0.000, - 0.006; No. 6, +0.000, - 0.008. For width N of tang slot up to No. 5 inclusive, +0.006, - 0.000; No. 6, +0.008, - 0.000. For centrality of tang E with center line of taper, 0.0025 (0.005 total indicator variation). These centrality tolerances also apply to the tang slot N . On rate of taper, all sizes 0.002 per foot. This tolerance may be applied on shanks only in the direction that increases the rate of taper and on sockets only in the direction that decreases the rate of taper. Tolerances for two-decimal dimensions are plus or minus 0.010, unless otherwise specified.
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