Product Introduction
The SH57-DRN gearmotor is a specialized right-angle drive solution designed for precision and ease of maintenance. Unlike standard keyed shafts, the SH series utilizes a hollow shaft paired with a shrink disc, providing a high-strength, friction-locked connection between the gear unit and the machine shaft.
Equipped with the DRN90 series IE3 motor, this unit offers premium energy efficiency, reducing operational costs while maintaining high reliability. The helical-worm design ensures extremely quiet operation, making it a preferred choice for indoor industrial environments where noise reduction and space-saving geometry are essential.
Technical Data Table
| Feature | Specification |
| Motor Power | 0.75 kW - 1.5 kW (Typical for 57 frame) |
| Energy Class | IE3 Premium Efficiency |
| Shaft Design | Hollow Shaft with External Shrink Disc |
| Housing Construction | High-strength vibration-damping cast iron |
| Output Torque | Up to 300 Nm |
| Voltage | 230V/400V or 460V (Global compatibility) |
| Standard Sealing | NBR oil seals (FKM optional for high temp) |
Product Characteristics
Zero-Backlash Connection: The shrink disc mechanism creates a 360-degree force-fit connection, eliminating the mechanical play and "fretting corrosion" typically associated with traditional keyways.
Streamlined Maintenance: By utilizing a friction-locked hollow shaft, the gearbox can be removed from the driven shaft effortlessly, even after years of operation in humid or dusty environments.
Exceptional Running Smoothness: The SH57 optimizes the sliding friction of the worm stage with a helical pre-stage, resulting in a drive that is significantly quieter than standard bevel or parallel shaft units.
Mounting Flexibility & Component Structure
The SH57 is engineered for versatile integration. The absence of an output flange (as seen in the SAF series) allows the unit to be foot-mounted or stabilized using a torque arm. This "floating" mount capability compensates for slight misalignments in the machine shaft, reducing stress on the bearings and extending the service life of both the gearmotor and the driven equipment. The shrink disc is positioned on the side of the housing, allowing for easy access for torque wrench tightening during installation.
Related Models & Configurations
| Full Gearmotor Model | Connection Type | Motor Frame | Mounting Position | |
| SH57-DRN90L4 | Shrink Disc | 90L | M1 Foot-Mounted | |
| SHF57-DRN80M4 | Shrink Disc + B5 Flange | 80M | M4 Vertical | |
| SA57-DRN90S4 | Keyed Hollow Shaft | 90S | M1 Foot-Mounted | |
| SH57-DRN100LS4 | Shrink Disc | 100LS | M3 Ceiling-Mount |
Application Industries
Conveyor Technology: Smooth start-stop cycles for package handling and sorting.
Packaging Machinery: Ideal for labeling and wrapping stations where space is limited.
Water Treatment: Driving small rotary aerators or chemical dosing pumps.
Food & Beverage: Used in bottling lines where easy disassembly for cleaning is required.
FAQ
1. What is the advantage of a shrink disc over a standard keyed shaft?
The shrink disc provides a backlash-free connection and prevents the "locking" of the shaft caused by corrosion. It makes removal much easier and handles reversing loads more effectively than a keyway.
2. Is the shrink disc included with the SH57 model?
Yes, the "H" in SH57 specifically denotes the hollow shaft with a shrink disc, and the component is typically supplied with the gear unit.
3. Does this IE3 motor support international voltages?
The DRN motor series is designed as a global motor, supporting various voltages and frequencies (50Hz/60Hz) to comply with energy standards in Europe, North America, and Asia.
4. Can I use the SH57 for vertical applications?
Absolutely. However, you must specify the mounting position (e.g., M4 or M2) so the factory can optimize the oil level and ensure the upper bearings are properly lubricated.
5. How do I prevent the shrink disc from slipping?
Ensure the machine shaft is free of grease and that the bolts are tightened to the specific torque values indicated in the SEW operating instructions using a calibrated torque wrench.
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