Product Introduction
The SEW-EURODRIVE SA87R57 series is a "problem-solver" for engineering teams requiring high torque at extremely low output speeds within a right-angle layout. The 5.5kW DRN132S4 motor provides the necessary power to drive heavy loads, while the R57 helical pre-stage optimizes the input speed for the secondary S87 worm stage.
This configuration is particularly valued for its hollow shaft design, which allows for direct mounting onto the driven machine shaft. This eliminates the need for expensive couplings and alignment procedures, significantly reducing the mechanical footprint and maintenance complexity of the drive system.
Technical Data Table
| Parameter | Technical Details |
| Rated Power | 5.5 kW / 7.5 HP |
| Input Speed | 1461 RPM (50Hz) / 1765 RPM (60Hz) |
| Efficiency Standard | IE3 Premium Efficiency |
| Output Shaft Dia | 60 mm (Hollow) |
| Duty Cycle | S1 (Continuous) |
| Oil Capacity | Approx. 8.5 - 13.0 Liters (Orientation dependent) |
| Weight | Approx. 185 kg (Varies with options) |
Exclusive Performance Features
High Overhung Load Capacity: The SA87 gearcase is built with reinforced bearing seats, allowing it to withstand significant radial forces often encountered in heavy conveyor and agitator applications.
Acoustic Optimization: The combination of precision-ground helical gears in the R57 stage and the sliding contact of the S87 worm stage results in a drive that is considerably quieter than multi-stage pure helical units.
Thermal Resilience: The large surface area of the S87 housing, combined with high-grade synthetic lubricants, ensures stable operating temperatures even under high-torque, low-speed conditions.
Installation Flexibility & Modular Design
The SA87R57 offers unparalleled versatility for machine builders. The "Universal" housing design permits mounting in six different orientations (M1 through M6). Furthermore, the modular system allows for the integration of specialized add-ons:
Torque Arm (OT): Simplifies shaft mounting by absorbing the reactive torque without requiring a foundation.
Shrink Disc (SAH): For applications requiring a zero-backlash, friction-locked connection to the machine shaft.
Encoder Integration: The DRN132S4 motor can be equipped with absolute or incremental encoders for precise positioning tasks in automated warehouses.
Related Models & Configurations
| Full System Model | Mounting Type | Motor Frame | Shaft Style | Brake/Option |
| SA87R57-DRN132M4 | Flange (SAF) | 132M | Hollow Shaft | Standard |
| S87R57-DRN132S4 | Foot Mounted | 132S | Solid Shaft | High Force |
| SA87R57-DRN132S4/BE11 | Torque Arm | 132S | Hollow Shaft | 40Nm Brake |
| SAH87R57-DRN112M4 | Flange (SAF) | 112M | Shrink Disc | Zero-Fret |
Primary Industry Applications
Mining & Aggregates: Driving heavy feeders and secondary conveyors.
Chemical Processing: Large-scale slow-speed agitators and mixers.
Waste Management: High-torque shredders and compacting machinery.
Port Machinery: Powering crane travel drives and heavy-duty winches.
FAQ
1. Why use a compound R57+S87 instead of a single S87 gear unit?
High ratios in a single-stage worm gear (e.g., 100:1) result in low efficiency. By using the R57 helical stage to provide the initial reduction, the worm stage operates at a more efficient speed, delivering more power to the shaft and generating less heat.
2. Is the 5.5kW motor suitable for high-start frequency?
The DRN132S4 is built for durability, but if your application requires more than 10-20 starts per hour, we recommend checking the thermal service factor or adding a forced cooling fan (V-fan).
3. What lubricant is recommended for the SA87R57?
Due to the high sliding friction in the worm stage, we strictly recommend SEW GearOil Polyglycol (PG) or equivalent high-performance synthetic oil. This ensures the gear set reaches its intended 20,000+ hour service life.
4. Can this unit be used in washdown environments?
Yes. For food or beverage applications, we can provide the unit with OS2 to OS4 surface protection (high-durability paint) and IP66 enclosure ratings for the motor.
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