Product Overview
The F57-DRN90L4 is specifically engineered to handle the "overhung load" challenges that smaller models cannot. While the motor provides a consistent 1.5 kW output, the F57 gear unit translates that power through high-tensile helical gearing, resulting in a drive that is both quiet and thermally stable.
Unlike standard worm gears that lose efficiency through heat, the F57's parallel helical design maintains over 95% efficiency across most ratios. This ensures that the DRN90L4 motor operates within its optimal range, extending the service life of the windings and bearings even in 24/7 automated environments.
Technical Parameters Table
| Feature | Performance Data |
| Output Speed Range | 5.3 to 365 RPM (at 50 Hz) |
| Service Factor (fB) | Up to 3.0+ (Ratio dependent) |
| Efficiency Class | IE3 (Premium Efficiency) |
| Housing Construction | Torsion-resistant gray cast iron |
| Lubrication | Mineral (CLP) or Synthetic (PGL) options |
| Weight | Approx. 45 - 55 kg (depending on options) |
F57 Unique Performance Features
- Reinforced Bearing Span: The F57 housing features an elongated internal bearing distance. This specific geometry is designed to support the heavy radial forces common in industrial mixers and large-diameter pulley drives.
- High-Stiffness Gearing: The gear teeth are ground with a specific "crowned" profile, which compensates for shaft deflection under maximum load, ensuring uniform contact and preventing edge-chipping.
- Optimized Oil Chamber: The internal casting of the F57 is designed to maximize oil splashing even at low output speeds, ensuring the upper gear stages are lubricated without requiring a pump.
Installation Flexibility: The "Space-Saver" Advantage
One of the most significant benefits of the F57 series is its mounting adaptability. Because the gear unit is notably flatter than the K-series (Bevel) or R-series (Helical), it can be tucked directly against a conveyor wall.
- Torque Arm Support: Can be fitted with a rubber-buffered torque arm to absorb startup jolts, protecting your machine's drive shaft.
- Shrink Disc Compatibility: The hollow shaft version can be equipped with a shrink disc for a maintenance-free, friction-locked connection that eliminates the need for shaft keys and prevents mechanical play over time.
Related Model Comparison (F-Series Parallel Units)
| Model | Max Torque (Nm) | Typical Motor (kW) | Best Use Case |
| F47 | 400 | 0.75 - 1.1 | Lightweight conveyors |
| F57 | 600 | 1.1 - 2.2 | Agitators & Heavy Transfers |
| F67 | 820 | 2.2 - 4.0 | Heavy-duty bucket elevators |
Primary Application Industries
- Chemical Processing: Driving top-entry agitators and chemical mixers.
- Material Logistics: High-capacity belt conveyors and incline sorters.
- Wood & Paper: Feeding systems for timber processing where vertical space is limited.
- Packaging: Multi-lane palletizing units requiring slim-line drive clusters.
FAQ
Q: Why choose the F57 over an R-series (Inline) gearbox?
A: The F57 offers a "flat" geometry. If your motor cannot stick out perpendicular to your machine, the F57 runs parallel to the shaft, saving significant aisle space in factories.
Q: Is the DRN90L4 motor compatible with 60Hz power grids?
A: Yes. As a global motor platform, the DRN series is multi-voltage and multi-frequency, making it suitable for export to North American and Asian markets.
Q: Does the IE3 rating actually save money at 1.5kW?
A: Over a standard 3-year lifecycle in a 24/7 facility, the IE3 motor pays for its price premium through reduced electricity consumption and lower heat-related downtime.
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