Product Overview
The SEW R57-DRN series is a versatile, coaxial (inline) helical gearmotor designed for high-efficiency power transmission. By pairing the robust R57 gearbox with a DRN series IE3 motor, this unit meets global premium efficiency standards while providing a compact footprint. It is widely regarded as the "sweet spot" for medium-load industrial applications, offering a perfect balance between high torque density and space-saving design.
Detailed Technical Specifications
| Category | Parameter | Value / Specification |
| Mechanical | Max Output Torque (Ma) | 450 Nm |
| Service Factor (fb) | 1.0 to 3.0+ (Application dependent) | |
| Gearbox Efficiency | Approx. 94% - 96% (Multi-stage) | |
| Output Shaft Dia. | 30 mm (ISO k6) | |
| Housing Material | High-strength Grey Cast Iron (GG20/25) | |
| Electrical | Efficiency Class | IE3 (Premium Efficiency) |
| Rated Speed (nn) | ~1450 RPM (4-pole, 50Hz) | |
| Protection Class | IP55 (Standard) / IP66 (Optional) | |
| Insulation Class | 155 (F) | |
| Ambient | Temp Range | -20°C to +40°C |
Complete Model Selection and Comparison Table
| Complete Model Name | Mounting Type | Typical Power | Key Features | Ideal Application |
| R57 DRN90S4 | Foot-mounted | 1.1 kW | Standard IE3 motor | Floor-mounted conveyors |
| RF57 DRN90L4 | B5 Flange | 1.5 kW | 200mm/250mm Flange | Machine-side attachment |
| R57 DRN100LS4/BE5 | Foot-mounted | 2.2 kW | BE5 Brake | Inclined belts & safety stops |
| R57 DRN90L4/V | Foot-mounted | 1.5 kW | Forced Cooling Fan | Low-speed VFD operation |
| R57 DRN90S4/TF | Foot-mounted | 1.1 kW | Thermistor | Heavy-duty thermal cycles |
3. Modular Options and Accessories
The R57-DRN can be customized using the SEW-EURODRIVE modular toolkit:
- BE Series Brakes: Integrated spring-applied brakes (e.g., BE2, BE5) for fail-safe stopping and holding.
- Encoders: Integrated incremental or absolute encoders (e.g., EI7C) for precise speed feedback and positioning.
- Surface Protection: Optional OS1 to OS4 coatings for high-moisture, chemical, or outdoor environments.
- Forced Cooling (/V): An independent fan that allows the motor to run at high torque even at very low RPM without overheating.
- FKM (Viton) Seals: Upgraded oil seals for high-temperature applications or aggressive lubricants.
Target Industries and Applications
The R57 is a versatile unit found in almost every industrial sector:
- Logistics & Warehousing: Standard drive for roller conveyors, belt conveyors, and sorters.
- Food & Beverage: Used in bottling lines, packaging machinery, and light mixers.
- Packaging: Primary drive for palletizers, wrappers, and labeling machines.
- Automotive: Auxiliary drives for assembly lines and skillet conveyors.
- Agriculture: Powering small screw conveyors and grain processing equipment.
FAQ
Q: Why choose the R57 over the R47 for a 1.5kW application?
A: While the R47 can handle 1.5kW, its torque limit is 300 Nm. The R57 increases this to 450 Nm. If your application has high starting loads or potential for jamming, the R57 provides a much higher Service Factor (fb), ensuring the gears don't strip under stress.
Q: Does the IE3 motor actually save money on such a small unit?
A: Yes. For a 1.5kW motor running 24/7, an IE3 motor reduces energy waste significantly compared to older IE1/IE2 units. Over a 5-year period, the energy savings often exceed the initial cost of the gearmotor.
Q: What is the maintenance schedule for the R57?
A: With standard mineral oil, a change is recommended every 10,000 hours. If using Synthetic CLP PG oil, the interval extends to 25,000 hours. Always check the breather valve during routine inspections to ensure it isn't clogged with dust.
Reliable and Efficient
The SEW R57-DRN IE3 is the go-to solution for engineers seeking a reliable, high-efficiency inline drive. Its modular design allows it to fit into almost any mechanical environment, while the IE3 motor ensures compliance with modern green energy regulations.
Hot Tags: sew r57 inline helical gearmotor with ie3 motor, China sew r57 inline helical gearmotor with ie3 motor suppliers, factory, compact gear reducer, industrial gear, industrial speed reducer, sew r series gear motor, SEW R77 DRN112M4 Industrial Gear Speed Reducer, SEW RF87 gearbox