Gears Flashcards
Gear definition
toothed wheels that interlock to transfer motion form one part of a machine to another
Gear train definition
transmits rotary motion and torque
Torque definition
force that causes rotation
Different sized gears connect to increase…
or decrease speed of rotation or torque
Drive gear definition
the input, turns the driven gear
Driven gear definition
the output, turned by the drive gear
Which way do the drive gear and the driven gear turn
opposite directions
Idler gear definition
used to change the direction of rotation, drive and driven gear turn the same way,
Does the idler gear’s size matter
no, it transfers movement
Gear ratio definition
ratio between the drive gear and the driven gear, relative sizes of the gears determines how fast each will turn
How to calculate gear ratio
number of teeth on driven gear/number if teeth on drive gear
Drive gear teeth = 40
Driven gear teeth = 20
Gear ratio = ?
20/40 = 0.5 or 1:2
How to calculate velocity ratio
drive gear/driven gear
