ISB SG Series Slewing Drives
Suitable for industrial, mobile, and automation applications requiring controlled rotation and high holding torque.
The ISB SG Series Slewing Drives are compact, high-performance worm-driven units designed for precise rotary motion under heavy loads. They provide excellent rigidity, positioning accuracy, and protection against environmental conditions.
Key Features
- Integrated worm gear slewing system
- Cast iron housing for strength and durability
- Enclosed lubrication system
- High positioning accuracy (≤ 0.15°)
- High holding and self-locking capability
- Corrosion-resistant sealing system
- Compact, space-saving design
- Optional encoder and customised finishes
Selection Guidelines
Output torque is calculated from friction torque and operating resistance. Input torque must include a safety margin of 40–100% depending on duty cycle. When selecting an SG Slewing Drive, ensure:
- Load capacity meets axial, radial, and moment requirements
- Output torque exceeds application demand
- Input torque is within allowable limits
- Operating speeds are within rated values
Construction
Designed to ensure smooth operation, long service life, and resistance to dust and moisture. Each SG Series unit consists of:
- Cast iron housing
- Slewing ring and raceway
- Worm gear drive system
- Labyrinth sealing system
- Motor adapter flange
- Optional encoder
- Cast iron housing
- Slewing ring
- Raceway
- Labyrinth monolithic seal
- External companion flange
- Drive (hydraulic motor / electric motor
- Motor adapter
- O-ring
- Input hole
- Shaft opposite to motor
- End cap
- Cover
- Encoder (optional)
Drive Options
ISB SG Slewing Drives can be powered by:
- Hydraulic motors (standard interface)
- Electric motors with gearbox (via adapter flange)
Both configurations allow rigid or flexible coupling depending on application requirements.
Performance Range
| Model | Max Output Torque (kNm) | Max Input Torque (Nm) | Ratio | Max Output Speed (rpm) |
|---|---|---|---|---|
| SG175 | 3.5 | 180 | 47:1 | 1.0 – 2.5 |
| SG222 | 8.0 | 300 | 62:1 | 1.0 – 2.5 |
| SG310 | 9.5 | 300 | 79:1 | 1.0 – 2.5 |
| SG342 | 10.8 | 300 | 86:1 | 1.0 – 2.5 |
| SG430 | 13.0 | 300 | 104:1 | 1.0 – 2.5 |
| SG480 | 18.5 | 300 | 94:1 | 1.0 – 2.5 |
| SG540 | 28.7 | 800 | 90:1 | 1.0 – 2.5 |
| SG630 | 34.2 | 800 | 104:1 | 1.0 – 2.5 |
Load Capability
Each model includes verified static and dynamic load charts for safe sizing and application. Technical verification is recommended for suspended loads. Designed to handle combined loads:
- Axial loads (Fa)
- Radial loads (Fr)
- Tilting moments (Mf)
Maintenance
Operating Temperature
- Drive: –30°C to +60°C
- Grease: –40°C to +200°C
Maintenance Guidelines
- Insufficient lubrication is the most common cause of failure
- Full re-lubrication recommended every 3 years
- Do not clean using high-pressure water or steam
Resources
