| Calculate |
When
Defined |
Formula |
| Diametral
Pitch (P) |
Pitch
Diameter (D) and the Number of Teeth (N) |
P
= N / PD |
| Diametral
Pitch (P) |
Circular
Pitch (p) |
P
= 3.1416/p |
| Diametral
Pitch (P) |
Outside
Diameter (OD) and the Number of Teeth (N) |
P
= (N+2)/OD |
| Pitch
Diameter (PD) . |
Number
of teeth (N) and the Diametral Pitch (P) |
PD
= N/DP |
| Outside
Diameter (OD) |
Number
of teeth (N) and the Diametral Pitch (P) |
OD
= (N+2)/DP |
| Number
of Teeth (N). |
Pitch
Diameter (D) and the Diametral Pitch (P) |
N
= PD * DP |
| Addendum
(a) . |
Diametral
Pitch (P) |
a
= 1/DP |
| Dedendum
(d) |
Whole
Depth and Addendum |
d
= hw - a |
| Tooth
Thickness (t) at the Pitch Diameter |
Diametral
Pitch (P) |
t
= 1.5708/P |
| Working
Depth (WD). |
Addendum |
WD
= 2(a) |
| Center
Distance (C) |
Normal
Diametral Pitch (P) and the Number of Teeth in Both Gears |
C
= (N1+N2)/2P |
| Center
Distance (C) |
Pitch
Diameters of both gears |
C
= (PD1+PD2)/2 |
| Circular
Pitch (p) |
Diametral
Pitch (P) |
p
= 3.1416 / P |
| Whole
Depth (hw) for 20 Pitch & finer . |
Diametral
Pitch (P) |
hw
= 2.2/P + .002 |
| Whole
Depth (hw) for Coarser than 20 Pitch . |
Diametral
Pitch (P) |
hw
= 2.157/P |
