How to choose the right gear
When selecting gears, there are various factors to consider, but in all cases, gears must be selected that are strong enough to withstand the load required for their intended use.
The first step is to determine the application’s required specifications. For example, how many kilograms of an object are to be moved in how many seconds, and then to calculate the load (torque) required to achieve those specifications.
In a pair of gears, the strength of the pinion gear is lower than that of the mating gear. Therefore, it is prudent to select the gears based on the pinion strength.
When choosing the gears, it is necessary to consider the bending strength and the surface durability of the teeth. The bending strength is the strength of the teeth against breakage, and the tooth surface durability is the strength of the tooth surface against wear such as fatigue damage.
In order to select gears that are strong enough to withstand the calculated load, it is necessary to select gears whose bending strength and tooth surface durability both exceed the calculated load.
