T-152
Fig. 17-1 Chart of Tooth Profile Factor, YF
Normal STD Pressure
Angle an = 20°
Addendum ha = 1.00 mn
Dedendum hf = 1.25 mn
Corner Radius of Cutter
g = 0.375 mn
3.8
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
3.5
3.4
3.3
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
10
11
12
13
14
15
16
17
18
19
20
25
30
35
40
45
50
60
80100200 400 ¥
X = 0.8
X = 0.9
X = 1.0
z
Equivalent Spur Gear Number of Teeth
zv = ––––––
cos3b
