How to Select the Right F Series Parallel Shaft Gearbox for Your Motor – Complete Selection Guide
Selecting the right F series parallel shaft gearbox for your motor isn’t just about picking a model from a catalog. It’s about matching power, torque, speed ratio, and mounting configuration to your specific application.
The core formula for matching F-series reducers with motors
The core function of the reducer is to "reduce speed and increase torque" - converting the high-speed low torque of the motor into low-speed high torque output
| 速比（speed ratio） i | Input speed ÷ Output speed | i = n₁ / n₂ |
| output torque T₂ | Motor torque x speed ratio x efficiency | T₂ = 9550 × P × i × η / n₁ |
Instructions:
P=motor power (kW)
N ₁=motor input speed (r/min, usually 1450-1500 r/min for 4-pole motors)
I=reduction ratio
η=gearbox efficiency (F-series single-stage efficiency ≥ 95%, two-stage efficiency up to 96%)
💡 Core principle: The power and torque of the motor must be less than the rated load capacity of the reducer, and the output torque of the reducer must be greater than the actual torque required by the load
2. Choose the machine base size based on power and torque
The F series offers 11 machine base specifications for F27-F157, with power ranging from 0.12kW-200kW and torque ranging from 3N · m-22500N · m
