Yancheng Weigu Intelligent Technology Co., Ltd.
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20mm GM20-20BY: 18° Step Angle Geared Stepper Motor (2 Phase 4 Wire) for Optical Equipment
The PM20 reduction stepper motor stands out for its enhanced precision: after integrating the reduction gearbox, step angles are subdivided to boost load torque and control accuracy. Choose from reduction ratios (10, 12.5, 25...488) to match your speed/precision needs, paired with 5V-12V operation and speeds spanning 10rpm-500rpm. At 20mm in diameter (18mm motor length, 16.0mm-20.5mm gearbox lengths), it’s lightweight yet durable—motor life exceeds 10,000 hours, gears 2,000+ hours—perfect for lab instruments and automated test stations.
| Product Name | Geared stepper motor |
| 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 Range | -0~+ 55 ℃ |
Gearbox Ratio Datasheet
| Number of Stages | 3 | 4 | 5 | 6 | 7 |
| Gear Ratio | 10 | 25 | 50 | 100 | 250 |
| 12.5 | 31.25 | 62.5 | 125 | 312.5 | |
| 78.1 | 156.25 | 390.6 | |||
| 195.3 | 488.3 | ||||
| Length of Gearbox(mm) | 16 | 17.5 | 19 | 20.5 | |
Mechanical Dimension:MM
