20mm GM20-20BY Geared Stepper Motor with 18° Step Angle, 5V-12V Operation, and Multiple Gear Ratios for Precision Control
The 20mm GM20-20BY geared stepper motor delivers enhanced precision through integrated reduction gearing, subdividing the standard 18° step angle to improve load torque and control accuracy. With multiple reduction ratios available and operating voltages from 5V to 12V, this 2-phase 4-wire motor offers speeds ranging from 10rpm to 500rpm to meet diverse application requirements.
- 20mm diameter compact design with 18mm motor length
- 18° step angle with gearbox subdivision for enhanced precision
- Multiple reduction ratios available (10 to 488.3)
- 5V-12V operating voltage range
- Extended service life: motor exceeds 10,000 hours, gears 2,000+ hours
- Bipolar drive with 2-2 phase excitation
- Blood and saliva analyzers
- Welding machines and fiber fusion splicers
- Intelligent security products
- Digital electronics and automated test stations
- Optical equipment and laboratory instruments
| Parameter | Specification |
|---|---|
| Model | 20BY45-11G |
| Resistance | 20 Ω ± 10%/phase (25℃) |
| Current Per Phase | 100 mA/phase (800PPS) |
| Max Starting Frequency | 800 pps |
| Max Response Frequency | 1000 pps |
| Excitation Method | 2-2 phase excitation |
| Drive Mode | Bipolar drive |
| Pull-out Thrust | More than 260g at 800 pps |
| Insulation Class | Class E for one second |
| Insulation Strength | 100 V AC for one second |
| Insulation Resistance | 50 mΩ DC 500 V |
| Operating Temperature | -0 to +55 ℃ |
| Stages | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|
| Gear Ratios | 10, 12.5 | 25, 31.25 | 50, 62.5, 78.1 | 100, 125, 156.25, 195.3 | 250, 312.5, 390.6, 488.3 |
| Gearbox Length (mm) | 16 | 17.5 | 19 | 20.5 | - |
This precision geared stepper motor combines compact 20mm diameter construction with robust performance characteristics. The integrated reduction gearbox enables fine control with multiple ratio options, while the bipolar drive system ensures reliable operation across various speed ranges from 10rpm to 500rpm. Ideal for applications requiring precise positioning and consistent torque output in medical, industrial, and electronic equipment.
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