Product Overview
The SEW S37 series is a high-performance helical-worm gear unit. By incorporating a helical gear input stage, it significantly improves the mechanical efficiency compared to traditional standalone worm gearboxes. Paired with the 0.75kW (1.0 HP) DRN80M4 IE3 premium efficiency motor, this model provides an extremely quiet, smooth, and cost-effective right-angle drive solution, ideal for noise-sensitive or space-constrained automation environments.
Detailed Technical Specifications
| Category | Parameter | Value / Specification |
| Mechanical | Output Torque (Ma) | Max 92 Nm |
| Gearbox Efficiency | Approx. 65% - 90% (Ratio dependent) | |
| Output Shaft Dia. | 20 mm (ISO k6 / H7) | |
| Noise Level | Extremely Low (Worm gear characteristic) | |
| Electrical | Motor Power (Pn) | 0.75 kW (1.0 HP) |
| Rated Speed (nn) | 1440 RPM (50Hz) / 1750 RPM (60Hz) | |
| Efficiency Class | IE3 | |
| Protection Rating | IP55 (Standard) / IP66 (Optional) | |
| Ambient | Temp Range | -20C to +40C |
Complete Model Selection and Comparison Table
| Complete Model Name | Mounting Type | Output Style | Key Options | Ideal Application |
| S37 DRN80M4 | Foot-mounted | Solid Shaft | Standard | Small floor conveyors |
| SF37 DRN80M4 | B5 Flange | Solid Shaft | Standard | Machine-side attachment |
| SA37 DRN80M4 | Torque Arm | Hollow Shaft | No coupling needed | Shaft-mounted direct drive |
| SAF37 DRN80M4/BE1 | B5 Flange | Hollow Shaft | BE1 Brake | Small lifts or stoppers |
| SA37 DRN80M4/TF | Torque Arm | Hollow Shaft | Thermistor | High-cycle start/stop |
Modular Options & Accessories
- Hollow Shaft Design (SA37): Allows the gearmotor to be mounted directly onto the customer's machine shaft. This eliminates the need for a coupling, significantly saving installation space.
- BE1 Electromagnetic Brake: A compact, fail-safe brake that provides reliable holding torque for the 0.75kW motor, preventing unintended movement.
- Torque Arm: Used with hollow shaft versions to simplify installation and absorb reaction torque, protecting the machine frame from stress.
- Synthetic Lubricant (CLP PG): It is highly recommended to use synthetic oil in helical-worm units. It reduces internal friction, improves efficiency, and extends the oil change interval to 25,000 operating hours.
Target Industries & Applications
- Logistics: Small belt conveyors, diverters, and sorting tables.
- Food and Beverage: Bottling line speed control, packaging machinery, and light mixers.
- Stage Technology: Curtain drives and small theater equipment (due to near-silent operation).
- Pharmaceutical: Tablet presses and clean-room conveyor systems.
FAQ
Q: Why choose the S37 (Helical-Worm) over a standard worm gearbox?
A: Standard worm gearboxes are often inefficient and generate high heat. The S37 uses a helical gear stage to handle part of the reduction, allowing the worm stage to operate at a more efficient angle. This results in higher torque output and lower operating temperatures.
Q: Does this model have a self-locking feature?
A: Some high-ratio versions provide a degree of self-locking. However, for safety-critical lifting applications, you should never rely on gear friction alone; always specify the BE1 Brake option.
Q: What are the maintenance requirements?
A: Helical-worm drives involve sliding friction, making oil quality critical. We recommend checking the oil level every 6 months. If using standard mineral oil, it should be changed every 10,000 operating hours.
Silent, Compact, and Efficient
The SEW S37-DRN80M4 IE3 is the professional choice for right-angle drives under 1.0 HP. Its superior noise reduction and diverse mounting options make it a versatile component for modern automated systems.
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