Description
The HS-20-II Hollow Shaft Strain Wave Gear Reducer is a compact, high-precision transmission solution designed for advanced motion control systems.
Featuring a hollow shaft structure, high torque density, and low backlash performance, this reducer is ideal for robotic joints, automation systems, and precision servo-driven mechanisms.
Engineered with advanced material processing and optimized tooth profile design, it delivers stable transmission accuracy, high torsional stiffness, and long service life.
Key Features
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Hollow shaft design
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Compact structure
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High torque capacity
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Low backlash (≤20 arcsec / ≤10 arcsec options)
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Maximum input speed up to 6500 rpm
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High torsional stiffness
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Long service life
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Optimized tooth profile for smooth transmission
General Specifications
| Parameter | Value |
|---|---|
| Model | HS-20-II |
| Outer Diameter | Ø95 mm |
| Total Thickness | 51.52 mm |
| Hollow Bore Diameter | Ø25 mm |
| Weight | ≤1.061 kg |
| Gear Ratios Available | 30 / 50 / 80 / 100 / 120 |
| Maximum Input Speed | 6500 rpm |
| Average Input Speed Limit | 3500 rpm |
| Moment of Inertia | 0.193 ×10⁻⁴ kg·m² |
Torque Performance (Rated @ 2000 rpm)
| Gear Ratio | Rated Torque (Nm) | Repeated Peak Torque (Nm) | Average Torque Limit (Nm) | Momentary Peak Torque (Nm) | Backlash |
|---|---|---|---|---|---|
| 30 | 15 | 27 | 20 | 50 | ≤20 arcsec |
| 50 | 25 | 56 | 34 | 98 | ≤20 arcsec |
| 80 | 34 | 74 | 47 | 127 | ≤10 arcsec |
| 100 | 40 | 82 | 49 | 147 | ≤10 arcsec |
| 120 | 40 | 87 | 49 | 147 | ≤10 arcsec |
Service Life
| Backlash Level | Service Life |
|---|---|
| ≤20 arcsec | 7000 hours |
| ≤10 arcsec | 10000 hours |
Dimensions
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Outer Diameter: Ø95 mm
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Total Thickness: 51.52 mm
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Hollow Bore Diameter: Ø25 mm
Mounting Configuration
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12 × Ø3.5 through holes
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16 × Ø3.5 (depth 13.5 mm)
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M3 threaded holes (depth 9 mm)
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6 × M3 threaded holes (depth 6 mm)
Material & Design Advantages
Advanced Material Processing
Enhanced structural stability and mechanical reliability. Designed to withstand overload conditions while protecting internal components.
Austempered Ductile Iron Structure
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Self-lubricating properties
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Low temperature rise
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Vibration damping
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Noise reduction
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Wide operating temperature range
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Extended service life
Precision Heat Treatment
Balanced hardness and toughness to improve fatigue resistance and long-term durability.
Optimized Tooth Profile
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Improved load distribution
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Reduced friction
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Smoother torque transmission
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Enhanced contact uniformity
Applications
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Industrial robotic joints
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Collaborative robotic arms
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Automated positioning systems
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CNC rotary mechanisms
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Servo-driven precision transmission
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High-accuracy motion control systems
Package Includes
1 × HS-20-II Hollow Shaft Strain Wave Gear Reducer
