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The reduction ratio, which is the transmission ratio of a speed reduction device, is a type of transmission ratio that represents the ratio of the instantaneous input speed to the output speed in a speed reduction mechanism. The maximum reduction ratio for single-stage WP series reducers is 1/60, while that for single-stage RV series reducers is 1/100. So, how are these reduction ratios determined? How should we calculate them? The following are several methods for calculating the reduction ratio of a gearbox: 1. Definition-based calculation method: Reduction ratio = input speed / output speed. 2. General calculation method: Reduction ratio = Applied torque / 9550 / Motor power. Motor power = Input rotation speed / Application factor. Precautions for using MB variable-speed transmissions. 3. Calculation method for the reduction ratio of belts, chains, and friction wheels: Reduction ratio = diameter of the driven wheel/diameter of the driving wheel. How to apply lubricant to helical gear reducers and cycloidal pinwheel reducers. 4. Calculation method for gear trains: Reduction ratio = number of teeth on the driven gear / number of teeth on the driving gear. (In the case of multi-stage gear reduction, multiply together the ratios obtained by dividing the number of teeth on the driven gear by the number of teeth on the driving gear for each pair of meshing gears; this applies to NRV reducers.)