Product Introduction
The SEW-EURODRIVE SAF47 series is specifically tailored for machine builders who require a compact right-angle drive that mounts directly to the application shaft. The "SAF" designation indicates a unit that combines a B5 flange housing with a hollow shaft, offering the ultimate flexibility in mechanical integration.
Powered by the DRN90S4 IE3 motor, this assembly delivers 1.1 kW of power with optimized electrical performance. The helical-worm design is particularly effective for applications that demand quiet operation and vibration damping, making it a preferred choice over standard bevel gearboxes in specific light-to-medium duty cycles.
Technical Data Table
| Feature | Specifications |
| Rated Power | 1.1 kW / 1.5 HP |
| Output Speed Range | 9 – 210 RPM (Based on ratio) |
| Hollow Shaft Diameter | 30 mm |
| Flange Diameter | 160 mm / 200 mm |
| Efficiency Class | IE3 Premium Efficiency |
| Housing Material | Aluminum / Grey Cast Iron |
| Lubrication | Synthetic Oil (CLP HC) |
Exclusive Performance Features
Integrated Slip Damping: The worm gear stage acts as a natural mechanical buffer, absorbing transient torque spikes that could otherwise damage sensitive upstream motor components.
Friction-Optimized Gearing: Unlike traditional single-worm reducers, the helical primary stage in the SAF47 pre-reduces the speed, allowing the worm set to operate at higher efficiency and lower thermal levels.
Low-Profile Installation: The right-angle orientation combined with the flange-hollow shaft design permits the gearmotor to sit flush against the machine wall, saving significant floor space in modular conveyor lines.
Component Structure & Modular Flexibility
The SAF47 utilizes a high-quality bronze alloy for the worm gear and a case-hardened steel worm shaft. The modularity of the DRN motor system allows this gearbox to be equipped with various options without changing the footprint:
Optional Torque Arm: Can be used in place of the flange for shaft-mounted configurations to handle reactive forces.
Integrated Brake (BE series): For applications requiring safe stopping or holding of loads.
Encoder Mounting: Direct interface for incremental or absolute encoders for speed and position feedback.
Related Models & Configurations
| Full Model Designation | Mounting Type | Motor Frame | Shaft Style | Additional Features |
| SAF47-DRN90L4 | B5 Flange | 90L | Hollow Shaft | 1.5kW Version |
| SF47-DRN90S4 | B5 Flange | 90S | Solid Shaft | External Drive |
| SA47-DRN90S4 | Foot Mounted | 90S | Hollow Shaft | Standard Keyway |
| SAF47-DRN80M4/BE1 | B5 Flange | 80M | Hollow Shaft | 5Nm Holding Brake |
Target Industry Applications
Intralogistics: Sorting systems and cross-belt conveyors where space is at a premium.
Food & Beverage: Driving small mixers and filling station carousels.
Packaging: Carton folding and sealing machines requiring smooth, quiet movement.
Material Handling: Light-duty lift stations and transfer modules.
FAQ
1. What is the benefit of the hollow shaft on the SAF47?
The hollow shaft allows you to slide the gearbox directly onto your machine's driven shaft. This eliminates the cost of couplings, reduces the overall width of the machine, and simplifies maintenance.
2. Is this model self-locking?
While some high-ratio helical-worm units have a degree of static self-braking, they are not a substitute for a mechanical brake. For safety-critical or vertical loads, the BE brake option is highly recommended.
3. Does the IE3 motor help with thermal load?
Yes. The DRN90S4 IE3 motor runs cooler than standard efficiency motors. Since worm gearboxes generate more heat than helical-bevel types, the higher efficiency of the motor helps maintain a lower overall system temperature.
4. Can I mount the SAF47 in any orientation?
Yes, but the oil level and breather valve position must be adjusted for the specific mounting position (M1-M6) to ensure the worm gear is properly lubricated and the seals don't leak.
Hot Tags: sew saf47 hollow shaft flange gearbox with drn90s4 ie3, China sew saf47 hollow shaft flange gearbox with drn90s4 ie3 suppliers, factory