DESCRIPTION
The HS-25-II Hollow Shaft Harmonic Drive Reducer is a high-precision strain wave gear designed for BLDC servo motor drive systems and robotic joint applications.
Featuring a compact hollow shaft structure, this reducer enables direct cable routing, shaft integration, and space-saving installation while maintaining exceptional positioning accuracy.
Thanks to its strain wave transmission principle, the HS-25-II delivers high torque density, ultra-low backlash, and smooth motion control, making it ideal for precision automation systems powered by BLDC motors.
Advanced material processing, optimized tooth profile design, and strict quality testing ensure long service life and stable performance under continuous operation.
This harmonic drive reducer is widely used in robot arms, collaborative robots, medical automation, and precision motion control platforms where BLDC servo motors are required.
SPECIFICATIONS
Series: HS
Model: HS-25-II
Type: Hollow Shaft Strain Wave Gear
Compatible Motor Type: BLDC Servo Motor
Available Gear Ratios
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30 : 1
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50 : 1
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80 : 1
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100 : 1
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120 : 1
Performance Parameters
| Gear Ratio | Rated Torque @2000 rpm (Nm) | Repeated Peak Torque (Nm) | Average Torque Limit (Nm) | Momentary Peak Torque (Nm) |
|---|---|---|---|---|
| 30 | 27 | 50 | 38 | 95 |
| 50 | 39 | 98 | 55 | 186 |
| 80 | 63 | 137 | 87 | 255 |
| 100 | 67 | 157 | 108 | 284 |
| 120 | 67 | 167 | 108 | 304 |
Maximum Input Speed: 5600 rpm
Average Input Speed Limit: 3500 rpm
Moment of Inertia: 0.413 × 10⁻⁴ kg·m²
Backlash: ≤20 arcsec (≤10 arcsec for higher ratios)
Physical Dimensions
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Outer Diameter: 115 mm
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Thickness: 55.5 mm
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Weight: ≤1.663 kg
APPLICATIONS
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BLDC servo motor drive systems
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Robot joint modules and robotic arms
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Collaborative robots (cobots)
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Medical automation equipment
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Precision positioning platforms
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Industrial automation and motion control
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Smart actuators and rotary modules
PACKAGE INCLUDES
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1 × HS-25-II Hollow Shaft Harmonic Drive Reducer
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Factory inspection and quality control verification
