SPUR GEAR – TOOTH FORCE ANALYSIS
The normal force F can be resolved into tangential force Ft which transmits the power
and radial component Fr which does no work but tends to push the gears apart. From the figure
Ft = F cos Ø
Fr = F sin Ø
Fr = Ft tan Ø
The pitch line velocity V, in meters per second, is given as
where d is the pitch diameter of the gear in millimeters and n is the rotating speed in rpm and W
power in kW.
V=πdn/6000
W=(Ft V)/1000
