The purpose of a gearbox is to reduce the amount of revolutions per minute and to increase the output of torque. The motor is fed through the gearbox in order to accomplish this.
The way that a gearbox puts torque out is dependent on the lifetime of the gearbox. The lifetime is determined by the number of gears that are present in the box and the direction that the gears move in. The stronger the power that is created from the gears, the stronger the torque that is put out will be. The speed by which it is put out is referred to as the gear ratio. This ratio determines the type of gearbox that is present in a motor setting.
The amount of torque that a gearbox puts out and the number of revolutions per minute that it reduces are both directly related to the efficiency of the gearbox. Gear boxes have several stages in them and the amount of stages changes the efficiency of the box. The more gear stages that are present in a gearbox, the greater the efficiency will be. When there are fewer, the efficiency will be reduced and the gearbox will not put out as much torque.