Gear Nomenclature - For Mechanical Engineers
This page aims to present basic gear nomenclature.
When you click on the alphabetically listed gear related words, you can confirm the meaning of each terminology.
Index :
B
Base circle
Base pitch
Bevel gears
Brass gears
C
Carburizing (Case hardening) of gears
Center distance
Chordal thickness
Circular pitch
Circular thickness
Circumferential backlash
Contact point
Contact ratio
Crowning
Cylindrical gears
D
Diametral pitch (DP)
Direction of rotation of gears
Driven gear
Driving gear
Dedendum of gears
Double helical gears
E
End relief (Relieving)
Enveloping worm gears
External gear
G
Gear efficiency
Gear formula
Gear injection molding
Gear shaper
Gears with a pressure angle of 20 degrees
Ground gears
H
Hardened gears
Hardness of gears
Helical rack
Helix angle of gears
Helix direction of gear teeth
Herringbone gears
High precision gears
I
Idler gear
Imperial gears
Induction hardening of gears
Intermeshing pitch circle
Internal gear
Intersecting axes gears
Involute curve
Involute gear
Involute tooth profile
L
Length of path of contact
Line of action
M
Metric gears
Module
Module 0.5 Gears
Module 1 Gears
Module 1.5 Gears
Module 2 Gears
Module 2.5 Gears
Module 3 Gears
Module 5 Gears
Multiple threaded worm
N
Nitriding process in gears
Nonparallel and nonintersecting axis gears (Skew gears)
Number of teeth
O
Operating pressure angle
Outside diameter
Over pin (ball) measurement
P
Parallel axis gears
Pitch circle
Pitch circle diameter (PCD)
Pitch cylinder
Pitch cone
Pitch point
Pitch surface
Planetary carrier
Pressure angle
Profile shift coefficient
R
Ring gears
Root circle
Root clearance
Root diameter
S
Shaft angle
Speed ratio of gears
Stub teeth
Sun gear
T
Thrust forces acting on gears
Tip circle
Tip diameter
Tooth face
Tooth flank
Tooth profile
Tooth size
Tooth surface
U
Undercut