Product Introduction
The SAF57-DRN90L4 represents a high-efficiency solution for compact industrial drive applications. This unit combines the S-series right-angle worm gearbox with the DRN90L4 IE3 premium efficiency motor, ensuring compliance with global energy standards. The "A" designation signifies the hollow shaft design, which eliminates the need for bulky couplings, while the flange mounting provides a stable, direct interface for heavy-duty machinery.
Engineered for quiet operation and high overhung loads, the SAF57 is particularly effective in environments where space is at a premium but high reduction ratios are required.
Technical Data Table
| Feature | Specification |
| Motor Power | 1.5 kW (2.0 HP) |
| Motor Type | DRN90L4 (IE3 Premium Efficiency) |
| Output Speed | Approx. 1400 RPM (Motor) / Variable (Gearbox) |
| Efficiency Class | IE3 |
| Enclosure Rating | IP55 (Standard) |
| Shaft Diameter | 35 mm (Hollow Shaft) |
| Lubrication | Synthetic Oil (CLP PG) / Mineral Oil |
Product Characteristics
High-Torque Right-Angle Transfer: Unlike smaller Spiroplan units, the SAF57 utilizes a specific worm-gear geometry that balances high torque output with a significant reduction in vibration.
Integrated DRN Efficiency: The inclusion of the DRN90L4 motor means the unit meets strict IE3 standards, reducing thermal loss and extending the service life of the gear teeth.
Wear-Free Torque Transmission: The friction-locked connection in the hollow shaft design prevents the "fretting corrosion" often found in keyed shaft alternatives.
Component Structure & Modular Flexibility
The SAF57 is built on a modular platform that allows for rapid adaptation. The "A" series hollow shaft is bored to high tolerances, allowing it to slide directly onto the driven machine's shaft. This reduces the total footprint of the drive system by up to 25% compared to parallel shaft configurations. Furthermore, the flange interface is compatible with various adapter plates, making it a "drop-in" replacement for legacy systems.
Related Models & Configurations
| Gearbox + Motor Model | Mounting Type | Shaft Type | Motor Power | |
| SAF57-DRN80M4 | Flange | Hollow | 0.75 kW | |
| SA57-DRN90L4 | Foot-Mounted | Hollow | 1.5 kW | |
| SHF57-DRN90L4 | Flange | Hollow/Shrink Disc | 1.5 kW | |
| SAF57-DRN100LS4 | Flange | Hollow | 2.2 kW |
Application Industries
Material Handling: Ideal for curved belt conveyors and palletizers.
Food Processing: Agitators and bottling lines where space-saving right-angle drives are needed.
Packaging: High-precision wrapping machines.
Wastewater Treatment: Small-scale sludge thickeners and scrapers.
FAQ
1. What is the benefit of the "A" in SAF57?
The "A" stands for the hollow shaft version. This allows the gearmotor to be mounted directly onto the customer's drive shaft, saving space and costs by removing the need for flexible couplings.
2. Can this unit be used with a frequency converter?
Yes. The DRN90L4 motor is fully compatible with frequency converters (AC Drives) for variable speed applications, provided the cooling and thermal limits are monitored.
3. Is the SAF57 gearbox self-locking?
Due to the high efficiency of the SEW worm-gear design, these units are generally not self-locking. For applications requiring the load to be held in place, an integrated brake (e.g., BE2 brake) is recommended.
4. What maintenance is required for the gear units?
Worm-gear units like the SAF57 require periodic oil changes. Depending on the ambient temperature and oil type (Mineral vs. Synthetic), intervals typically range from 10,000 to 25,000 operating hours.
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