Machinery's Handbook, 31st Edition
Standard Tapers 1017 Table 3. American National Standard Taper Drive with Keeper Key Slot, Self-Holding Tapers ANSI/ASME B5.10-1994 (R2013)
P
N G E
Taper 1 3/4 in. per Ft.
O
J
H
F
C
B
Z
K
X
M
N ”
Y
Y ”
A
Gage Line
Gage Line
Shank
Tang
Socket
Dia. at Gage Line (1) A
Gage Line to Tang Slot M
Gage Line to End C
Min. Depth of Hole K Drill Ream
Radius of Mill G
No. of Taper
Total Length B
Thickness E
Length F
Diameter H
Radius J
3 4
0.938 3.88 3.69 0.312 1.231 4.88 4.63 0.469
0.56 0.28 0.63 0.31 0.69 0.38 0.75 0.38 1.13 0.50 1.38 0.75
0.78 0.97 1.20 1.41 2.00 2.63
0.08 3.31 3.25 3.06 0.09 4.19 4.13 3.88 0.13 4.63 4.56 4.32 0.13 5.31 5.25 4.94 0.16 7.41 7.33 7.00 0.19 10.16 10.08 9.50
4 1 ⁄ 2 1.500 5.38 5.13 0.562 1.748 6.13 5.88 0.625
5 6 7
2.494 8.56 8.25 0.750 3.270 11.63 11.25 1.125
Tang Slot
Keeper Slot in Shank
Keeper Slot in Socket
Gage Line to Front of Slot Y
Gage Line to Bottom of Slot Y ′
Shank End to Back of Slot P
No. of Taper
Width N ′
Width N ′
Length X
Length Z
Width N
Length O
3 4
0.328 1.19 0.484 1.25 0.578 1.38 0.656 1.50 0.781 1.75 1.156 2.63
0.56 0.50 0.56 0.56 0.50 0.88
1.03 1.41 1.72 2.00 2.13 2.50
1.13 0.266 1.13 1.19 0.391 1.50 1.25 0.453 1.81 1.38 0.516 2.13 1.63 0.641 2.25 1.69 0.766 2.63
1.19 0.266 1.25 0.391 1.38 0.453 1.50 0.516 1.75 0.641 1.81 0.766
4 1 ⁄ 2
5 6 7
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; for hole diameter A , +0, - 0.002. For tang thickness E up to No. 5 inclusive, +0, - 0.006; larger than No. 5, +0, - 0.008. For width of slots N and N ′ up to No. 5 inclusive, +0.006, - 0; larger than No. 5, +0.008, - 0. For centrality of tang E with center line of taper 0.0025 (0.005 total indicator variation). These centrality tolerances also apply to slots N and N ′ . On rate of taper, see footnote in Table 2. Tolerances for two-decimal dimensions are ± 0.010 unless otherwise specified.
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