Machinery's Handbook, 31st Edition
2238
Spur Gearing
1) Pinion contact diameter, d c
. 33 10 31 093969 088274 . . # #
cos A
=
(1)
28 130
=
=
A
° ′ ′′
. b 036397 23 31 0 53227 0 36397 013713 7 4826 ° ′ ′′ = − − = ^ h = . . .
tan b
(2)
. . 23 093969 2 1815 inches # # . d 10 099073 c = =
(3)
2) Gear contact diameter, D c
. 25 10 23 093963 086452 . . a # #
=
cos a
(4)
=
=
30 1020
° ′ ′′
. B 036397 31 23 0 58136 0 36937 020267 11 2726 ° ′ ′′ = − − = ^ h = . . .
tan B
(5)
. . 31 093969 2 9725 inches # # . D 10 098000 c = =
(6)
3) Contact ratio, m f
31 0 53227 0 20267
.
.
m
h
^
f =
−
. 628318 . 1626 . 628318 . 1626
(7a)
=
23 0 58136 0 13713
.
.
m
h
^
f =
−
(7b)
=
4) Pinion LPSTC, d L
. c 058136 23 628318 030818 . . − =
tan c
=
(8)
17 741 ° ′ ′′
=
. . 10 095565 23 093969 2 2616 inches . # #
= =
d
L
(9)
5) Gear LPSTC, D L
. C 053227 31 628318 032959 . . − =
tan C
=
(10)
18 1430 ° ′ ′′
=
. . 10 094974 31 093969 3 0672 inches . # #
=
D
(11)
L
=
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