GEARS Flashcards
1
Q
Pinion - smaller of two mating gears
A
T1N1 = T2N2
D1N1 = D2N2
2
Q
Center Distance, C
A
(D1+D2)/2
3
Q
Speed Ratio
A
N1/N2
4
Q
Gear Ratio
A
T2/T1
T1 = no of teeth of the driver (pinion)
T2 = driver of the driven gear
5
Q
Diametral Pitch, Pd
A
No. of teeth/Pitch diameter, in
= T/D
6
Q
Circular Pitch, Pc
A
circumference of pitch circle, in/No of teeth
= πD/T
7
Q
module, m
A
Pitch diameter, mm/ no. of teeth
8
Q
Pc * Pd
A
π
9
Q
Power of Spur Gear
A
2πTN
10
Q
Transmitted load or tangential force, Ft
A
=T/(D/2)
= P/πDN
11
Q
Normal Load, Fn
A
Ft/cosθ
12
Q
Separating Load, Fr
A
Ft tan θ
