Product Overview
The SEW R137-DRN180L4 is an ultra-heavy-duty helical gearmotor designed for high-power industrial applications where maximum torque and mechanical endurance are critical. By combining the massive R137 gearbox-the largest in the standard R-series range-with a 22kW (30 HP) DRN180L4 IE3 motor, this unit provides the brute force required for heavy infrastructure. With a maximum torque capacity of 8000 Nm, it is the industry standard for driving massive conveyors, mixers, and processing plants.
Detailed Technical Specifications
| Feature | Technical Specification | Engineering Significance |
| Nominal Output Torque | Up to 8000 Nm | Handles extreme starting loads and high-inertia cycles |
| Output Shaft Dia. | 90 mm (ISO k6) | Massive shaft diameter to withstand extreme radial loads |
| Energy Efficiency | IE3 Premium Efficiency | Critical energy savings for high-wattage industrial utility |
| Protection Class | IP55 (Standard) / IP66 | Total protection against dust and high-pressure water jets |
| Gearing Surface | Precision-ground & Hardened | Ensures 96% efficiency despite the massive power output |
| Weight | Approx. 450 - 520 kg | Heavy-duty stability for high-vibration environments |
Technical Selection & Functional Variants
| Model Variant | Power (kW) | Mounting Type | Key Features | Best For |
| R137 DRN180L4 | 22 kW | Foot-mounted | 90mm Solid Shaft | Main belt conveyor drives |
| RF137 DRN180L4 | 22 kW | B5 Flange | 550mm or 660mm Flange | Large chemical agitators |
| R137 DRN180L4/BE30 | 22 kW | Foot-mounted | Integrated BE30 Brake | Safety-critical hoists & lifts |
| R137 DRN180L4/V | 22 kW | Foot-mounted | Forced Cooling Fan | Low-speed VFD control (<20Hz) |
| RF137 DRN180L4/TF | 22 kW | B5 Flange | Thermistor Protection | Thermal monitoring in hot zones |
Modular Options & Accessories (System Enhancement)
Given the 22kW power scale, the R137 is often equipped with advanced diagnostics to prevent costly downtime in critical production lines.
1. High-Performance Braking (BE Series)
The BE30 spring-applied brake provides the high static holding torque required for 22kW systems. This is vital for inclined conveyors to prevent gravity-induced back-driving during stops.
2. Condition Monitoring & Diagnostics
DUO (Diagnostic Unit Oil): Essential for R137 units due to the large oil capacity (up to 40+ liters depending on mounting). It monitors moisture and aging, enabling predictive maintenance.
DUV (Diagnostic Unit Vibration): Monitors bearing vibration and gear meshing frequency to detect early-stage wear in high-load scenarios.
3. Precision Feedback
EG7S / EH7S Encoders: High-resolution optical encoders for high-precision speed and position control, turning this massive unit into a controlled motion drive.
Built for Heavy-Duty Infrastructure
The R137-DRN180L4 is the "power core" for sectors requiring maximum mechanical torque.
- Mining & Quarries: Driving Primary Crusher Feeders, Long-distance Overland Conveyors, and Bucket Elevators. The 90mm shaft is designed to handle extreme radial tension.
- Cement & Aggregates: Powering Large Screw Conveyors, Ball Mill Auxiliaries, and Kiln Feeders where high heat and dust are prevalent.
- Chemical & Wastewater: Ideal for Massive Sludge Mixers, Aeration Turbines, and High-pressure Agitators.
- Metal Processing: Heavy-duty drive for Rolling Mill Tables, Scrap Cranes, and Baling Systems.
FAQ
Q: Why choose the R137 over the R107 for a 22kW application?
A: While the R107 can handle 22kW at specific ratios, its maximum torque is 4300 Nm. The R137 nearly doubles that capacity to 8000 Nm. If your machine requires slow speeds with high torque, the R107 will reach its mechanical limit quickly, whereas the R137 provides a massive Service Factor (fb) for a much longer lifespan.
Q: What is the maintenance interval for a 22kW helical gearmotor?
A: For a unit of this size, we recommend using Synthetic CLP PG oil, which extends the change interval to 25,000 operating hours. Standard mineral oil should be changed every 10,000 hours.
Q: Can this unit handle high radial loads from a large chain drive?
A: Yes. The R137's 90mm shaft and heavy-duty bearings are specifically designed for high permissible overhung loads. Always verify the radial force calculation based on your sprocket diameter and position on the shaft.
Ultimate Strength for Global Industry
The SEW R137-DRN180L4 IE3 Helical Gearmotor is a definitive industrial powerhouse. With its 8000 Nm torque capacity, 90mm shaft, and IE3 efficiency, it provides the reliability and raw power needed for the world's most demanding 22kW industrial drive tasks.
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