How to Select the Right CH/GH/GV Gear Motor – A Practical Guide for Engineers
Selecting the right gear motor for your application requires matching three critical parameters: power, torque, and reduction ratio. Here's a practical framework for CH/GH/GV series selection.
Step 1: Determine Required Output Speed
Calculate the output speed (RPM) your application needs. For a conveyor example:
Belt speed required: 0.5 m/s
Drive roller diameter: 100mm (radius 0.05m)
Roller circumference: 2π × 0.05 = 0.314m
Required shaft RPM = (0.5 ÷ 0.314) × 60 = 95.5 RPM
Step 2: Calculate Reduction Ratio
Reduction Ratio (i) = Motor Input Speed (RPM) ÷ Required Output Speed (RPM)
Motor rated speed: 1400 RPM (50Hz)
Required ratio = 1400 ÷ 95.5 ≈ 14.7:1
Select nearest standard ratio: 15：1
Step 3: Verify Output Torque
Output Torque = Motor Torque × Reduction Ratio × Efficiency
Motor torque ≈ 5.1 N.m
With 15:1 ratio and 92% efficiency:
Output torque ≈ 5.1 × 15 × 0.92 ≈ 70 N.m
Step 4: Choose Mounting Configuration
| Application Requirement | Recommended Model |
| Floor-mounted, horizontal shaft | CH / GH (Foot-mounted) |
| Machine frame, vertical shaft | CV / GV (Flange-mounted) |
| Space-constrained, direct motor coupling | GHM / GVM |
| Dual-direction output | GHD / GVD |
Step 5: Consider Environmental Factors
●Temperature: -10°C to +40°C operating range
●Dust/moisture: IP54/IP55 protection standard
●Frequent start/stop: Specify electromagnetic brake option
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CH/CV/GH/GV Vertical/Horizontal Gear Motor Related Knowledge: Product Introduction