Exercise 1:
A.
Calculation of gear ratios using the Job Master Trainer.
Gear
specification/
Part number
Gear type
Number of
Teeth
Pitch
Diameter
Diametrical
Pitch
Gear ratio
for the pair
H2472
Spur
72
3
24
3:4
H2496
Spur
96
4
24
L112Y
Miter
24
1.5
16
1:1
L112Y
Miter
24
1.5
16
H1616R
Helical
16
1
16
1:2
H1632
Helical
32
2
16
Speed
Gear pair 1
Actual velocity
ratio
Theoretical
velocity ratio
N1
N2
5
32
24
32/24= 4/3
96/72= 3:4
7
44
34
44/34= 22/7
96/72= 3:4
9
60
42
60/42= 10/7
96/72=3:4
Speed
Gear pair 2
Actual velocity
ratio
Theoretical
