00:02
In this question, we have to find compressive strength of pinion for safe design.
00:07
So let us start the gear ratio is given by z1 upon z2 is equal to i.
00:14
So z1 upon 20 will be equal to 3 according to the equation that implies z1 will be equal to 60.
00:23
So it is the number of gears, number of gears, sorry, it is the number of teeth, not number of gears, it is number of teeth in driven gear, driver gear, sorry, number of teeth in driver gear.
00:44
So we are calculating the module, module m will be given by 2a cos beta upon z1 plus z2.
00:55
So it will come out to be the 0 .65, taking it approximately equal to approximately equal to 1 only.
01:05
So now pitch circle diameter of driver gear d1 will be given by m into z1 upon cos beta.
01:17
So it will be equal to 1 into 60 to cos 23 degree and pitch circle diameter for the driven gear that is d2, it will be equal to m into z2 upon cos beta.
01:35
So this will be equal to 1 into 20 upon cos 23...