Product Overview
The SEW R87-DRN160M4 is a robust, coaxial helical gearmotor designed for heavy-duty industrial applications. By pairing the R87 gearbox-which offers a massive torque jump over mid-range models-with the 11kW (15 HP) DRN160M4 IE3 motor, this unit provides the mechanical strength and energy efficiency required for continuous, high-load operations in primary industries.
Detailed Technical Specifications
| Category | Parameter | Value / Specification |
| Mechanical | Max Output Torque (Ma) | 1550 Nm |
| Service Factor (fb) | 0.85 to 2.5+ (Depending on Ratio) | |
| Gearbox Efficiency | Approx. 94% - 96% | |
| Output Shaft Dia. | 50 mm (ISO k6) | |
| Housing Material | GG25 High-strength Grey Cast Iron | |
| Electrical | Motor Power (Pn) | 11 kW (15 HP) |
| Rated Speed (nn) | 1475 RPM (50Hz) / 1780 RPM (60Hz) | |
| Rated Voltage (Un) | 400V/690V (Standard Delta/Star) | |
| Efficiency Class | IE3 (Premium Efficiency) | |
| Protection | Enclosure Rating | IP55 (Standard) / IP66 (Optional) |
| Insulation Class | 155 (F) |
Complete Model Selection and Comparison Table
| Complete Model Name | Mounting Type | Flange/Foot | Key Options | Ideal Application |
| R87 DRN160M4 | Foot-mounted | Foot | Standard | Heavy belt conveyors |
| RF87 DRN160M4 | B5 Flange | 250/300 mm | Standard | Mixer or machine-side drive |
| R87 DRN160M4/BE20 | Foot-mounted | Foot | BE20 Brake | Hoists and inclined conveyors |
| R87 DRN160M4/V | Foot-mounted | Foot | Forced Cooling | VFD use at low speeds |
| R87 DRN160M4/TF/OS2 | Foot-mounted | Foot | Thermal Prot. | Outdoor/Corrosive zones |
Modular Options & Accessories
The R87-DRN160M4 can be customized for extreme durability using SEW-EURODRIVE's modular system:
- BE20 Spring-Applied Brake: The standard fail-safe brake for 11kW motors. It provides reliable holding torque, essential for safety in lifting or incline applications.
- TF (Thermistor) Protection: PTC sensors embedded in the motor windings are highly recommended for 11kW drives to protect against overheating during high-cycle starts or overloads.
- Surface Protection (OS): Optional OS1, OS2, or OS3 coatings provide superior resistance to high humidity, salt air (OS2), or chemical exposure (OS3).
- FKM (Viton) Oil Seals: Upgraded seals that withstand higher temperatures and aggressive chemical environments, ensuring a leak-free gearbox.
- Condition Monitoring: The R87 housing can be equipped with vibration (DUV) or oil-aging (DUO) sensors for predictive maintenance.
Target Industries & Applications
The R87 is a "Heavy-Class" drive found in primary production and large-scale logistics:
- Mining & Quarries: Driving large aggregate conveyors, feeders, and vibratory screens.
- Bulk Material Handling: Powering high-capacity bucket elevators, screw conveyors, and ship loaders.
- Recycling & Waste: Main drive for heavy-duty shredders, balers, and sorting trommels.
- Timber & Wood: Used in large debarkers, chippers, and heavy log transport systems.
- Cement & Aggregates: Reliable power for rotary feeders and clinker transport.
FAQ
Q: Why choose the R87 instead of an R77 for an 11kW motor?
A: While an 11kW motor can technically be attached to an R77, the R77's max torque is only 820 Nm. The R87 nearly doubles this to 1550 Nm. Choosing the R87 ensures a significantly higher Service Factor (fb), allowing the unit to handle the high-inertia starts and shock loads typical of 11kW applications.
Q: Is the DRN160M4 motor compatible with 60Hz power?
A: Yes. On a 60Hz supply (common in North America), the motor speed increases from 1475 RPM to approximately 1780 RPM, and the power output increases by roughly 20%, reaching nearly 13.2kW.
Q: What maintenance is required for a unit of this size?
A: Due to the high power and heat generation of an 11kW drive, we strongly recommend Synthetic CLP PG oil. This extends the oil change interval to 25,000 operating hours (vs. 10,000 for mineral oil) and provides much better protection for the gear teeth.
Rugged Precision for Heavy Industry
The SEW R87-DRN160M4 IE3 is the definitive choice for 11kW applications requiring high reliability and premium efficiency. Its 1550 Nm torque capacity and 50mm output shaft ensure it can handle the most punishing duty cycles in the world's most demanding industrial environments.
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