T-71
Shaft Angle
Outside Radial Module
Normal Pressure Angle
Spiral Angle
Number of Teeth and Spiral Hand
Radial Pressure Angle
Pitch Diameter
Pitch Cone Angle
Cone Distance
Face Width
Addendum
Dedendum
Dedendum Angle
Addendum Angle
Outer Cone Angle
Root Cone Angle
Outside Diameter
Pitch Apex to Crown
Axial Face Width
Inner Outside Diameter
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Table 8-6 The Calculations of Spiral Bevel Gears of the Gleason System
Example
Pinion Gear
Item
No.
Symbol
S
m
a n
bm
z1, z2
a
t
d
d1
d2
Re
b
ha1
ha2
hf
qf
qa1
qa2
da
df
da
X
Xb
di
Formula
tanan
tan–1(–––––––)
cosbm
zm
sinS
––––––––
tan–1( z2 )
–– +cosS
z1
S - d 1
d2
––––––
2sind2
It should be less than Re /3 or 10m
1.700m – ha2
0.390m
0.460m + –––––––––
z2 cosd1
(––––––––)
z1 cosd2
1.888m – ha
tan–1 (hf /Re)
qf2
qf1
d + qa
d – qf
d
+ 2ha cosd
Recosd
– ha sind
b cosda
––––––
cosqa
2b sinda
da – –––––––
cosqa
90°
3
20°
35°
20 (L) 40 (R)
23.95680
60 120
26.56505° 63.43495°
67.08204
20
3.4275 1.6725
2.2365 3.9915
1.90952° 3.40519°
3.40519° 1.90952°
29.97024° 65.34447°
24.65553° 60.02976°
66.1313 121.4959
58.4672 28.5041
17.3563 8.3479
46.1140 85.1224
