Recent content by 961008

The gear ratio is the ratio of angular displacement, angular velocity, angular acceleration, torque etc of the input with respect to output. However, I would like to know that which of these variables will be scaled exactly to the gear ratio in reality, as there might be some friction in the...

Is it true that quenching will decrease the toughness of material and tempering the quenched material will then increase the toughness? I need an explanation in term of the effect of quenching and tempering on the structure of the material.

The friction I refer to is the friction per revolution of the wheel. The "big" refers to the diameter of the wheels, with the same width.

How can we calculate the friction between the wheels and the surface in contact? I know that big wheels will have a greater friction, but what is the formula to calculate it?