Product Overview
The F77-DRN100L4 represents the transition from standard industrial drives to heavy-duty power transmission. While the F67 caters to mid-range tasks, the F77 is built with a significantly larger gear set and a wider bearing base to manage a consistent 3.0kW input. The parallel shaft arrangement ensures the motor runs alongside the machine shaft, providing a "flat" footprint that allows for dense equipment clustering in factories.
Equipped with the DRN100L4 motor, this gearmotor satisfies global IE3 efficiency mandates, ensuring high energy conversion with minimal heat loss. This makes the F77 ideal for continuous duty (S1) cycles where reliability and low operational costs are the primary KPIs.
Technical Parameters Table
| Feature | Performance Specification |
| Output Speed | 5.2 to 348 RPM (at 50 Hz) |
| Service Factor (fB) | 1.0 to 3.5 (Application specific) |
| Efficiency Class | IE3 Premium Efficiency |
| Housing Construction | Reinforced GG25 High-Strength Cast Iron |
| Brake Options | Optional BE5 Brake (55 Nm holding torque) |
| Lubrication | High-pressure CLP mineral or food-grade oil |
F77 Unique Performance Features
- Over-Sized Internal Bearing Spans: Unlike smaller models, the F77 utilizes an expanded internal housing architecture. This allows for the installation of larger bearings that can absorb the massive bending moments generated by heavy-duty agitators and large-diameter pulleys.
- Extreme Torsional Rigidity: The F77 housing is cast with thick-walled reinforcement ribs at critical stress points. This prevents casing "flex" under peak loads, ensuring that gear teeth remain perfectly aligned to avoid localized pitting.
- High-Flow Lubrication Passages: The internal geometry is designed to promote oil circulation even at very slow output speeds, preventing dry-starts in vertical mounting positions that often plague standard gear units.
Component Structure & Reliability
The F77 is built using a two or three-stage helical gear train. All gear components are manufactured from high-tensile alloy steel, case-hardened, and ground to sub-micron tolerances.
- Dual-Lip Oil Seals: The F77 comes standard with advanced sealing systems to protect against abrasive dust in mining or cement environments.
- Hollow Shaft Versatility: The unit's hollow shaft design allows for direct mounting onto the driven machine's shaft, eliminating expensive and high-maintenance couplings.
Related Model Comparison (Heavy-Duty F-Series)
| Model | Max Torque (Nm) | Power Range (kW) | Application Focus |
| F67 | 820 | 1.1 - 2.2 | General Material Handling |
| F77 | 1500 | 1.5 - 4.0 | Mixers & Heavy Conveyors |
| F87 | 3000 | 2.2 - 7.5 | Primary Crushers & Elevators |
Primary Application Industries
- Wastewater Treatment: High-torque drives for clarifiers and thickener rakes.
- Pulp & Paper: Operating rollers and drying cylinders in paper machines.
- Mining & Aggregates: Driving heavy-duty screw conveyors and vibrating feeders.
- Chemical Industry: Powering large-scale top-entry mixers for high-viscosity fluids.
FAQ
Q: Can the F77 handle extreme cold or hot environments?
A: Yes. With specialized oil seals (Viton) and low-temperature or high-temperature synthetic lubricants, the F77 can operate in environments ranging from -20°C to +60°C.
Q: Is the TorqLOC® hollow shaft system available for this model?
A: Yes, the F77 supports the TorqLOC® non-keyed mounting system, which makes installation and removal much easier, especially in environments where corrosion might otherwise "freeze" a keyed shaft to the gearbox.
Q: Why use a parallel shaft gearmotor instead of a helical-bevel (K-series)?
A: While K-series units are great for 90-degree turns, the F77 is often more cost-effective and simpler to install if your motor can sit parallel to the drive shaft. It provides high efficiency (up to 96%) without the complexity of bevel gearing.
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