Table 1. Essential Dimensions of American National Standard Spindle Noses for Milling Machines ANSI/ASME B5.18-1972 (R2014)
E min
X Slot and key location .002 total M
Face of column
Usable threads
M
Z
Standard steep machine taper 3.500 inch per ft
K
X See Note 3
H
.015
Max variation from gage line
.015
B
D min
C
A gage
H
–X–
Z
L min section Z-Z
F ′ F
Keyseat Key tight fit in slot when insert key is used
X .0004 See note 4
F
G
G
G ′
Preferred Key Construction
Optional Key Construction
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