Product Introduction
The SEW-EURODRIVE SF67 series represents the middle-ground of the helical-worm range, offering a significant jump in torque capacity over the SF57 without requiring a massive increase in installation space. The "S" series is distinct because it utilizes a helical gear primary stage to offset the inherent efficiency losses of traditional worm gearboxes.
This specific configuration utilizes the DRN100LS4 motor, part of the modular DR.. motor platform. The flange-mounted design is particularly effective for vertical or horizontal mounting directly onto bulkheads or gear-driven machinery, providing a rigid and vibration-resistant connection.
Technical Data Table
| Parameter | Specification Details |
| Input Power | 2.2 kW / 3.0 HP |
| Output Speed | 10 – 200 RPM (Depending on ratio) |
| Motor Frame | 100LS |
| Efficiency Class | IE3 Premium Efficiency |
| Enclosure Rating | IP55 (Standard) / IP66 (Optional) |
| Lubrication | Synthetic Oil (CLP HC 460) |
| Shaft Dimensions | 35mm x 70mm (Solid Shaft) |
Exclusive Performance Features
High Overhung Load Tolerance: The SF67 is built with heavy-duty output bearings that allow it to support high radial forces, making it suitable for chain-driven or sprocket applications.
Silent Power Transmission: The sliding contact of the worm stage results in exceptionally low noise emission, which is critical for indoor production environments and conveyor systems located near personnel.
Corrosion-Resistant Options: Available with the "i" series coating and specialized oil seals, the SF67 can be adapted for humid or chemical-heavy environments where standard units might fail.
Component Structure & Durability
The SF67-DRN100LS4 is constructed with a high-grade grey cast iron housing that provides excellent thermal damping and structural rigidity. The worm wheel is made from a specialized abrasion-resistant bronze, paired with a case-hardened worm shaft. This material synergy, combined with the precision-ground helical input stage, ensures that the gearbox maintains its efficiency over thousands of operating hours with minimal mechanical backlash.
Related Models & Configurations
| Full System Designation | Mounting Type | Motor Frame | Shaft Style | Specific Options |
| SF67-DRN90L4 | B5 Flange | 90L | Solid Shaft | Standard 1.5kW |
| SAF67-DRN100LS4 | B14 Flange | 100LS | Hollow Shaft | Space-Saver Design |
| SF67-DRN100L4/BE5 | B5 Flange | 100L | Solid Shaft | 55Nm Spring Brake |
| SF67-DR2S100LS4 | B5 Flange | 100LS | Solid Shaft | Standard Efficiency |
Primary Industry Applications
Packaging Machinery: Driving rotary tables and high-torque indexing units.
General Conveying: Used in logistics for heavy pallet transport where right-angle space is limited.
Water Treatment: Small-scale agitators and chemical dosing pumps.
Automotive Logistics: Powering skids and transfer stations in assembly plants.
FAQ
1. Is the SF67 gearbox interchangeable with other S-series models?
The SF67 has specific mounting dimensions. While it shares the "S" design philosophy with the SF57 or SF77, the flange diameter and shaft height are unique to the 67 size. Always check the dimension sheet before retrofitting.
2. Does this model require a breather valve?
Yes. For most mounting positions (especially M1 or M4), a breather valve is essential to prevent pressure buildup within the gearbox, which can lead to oil seal leakage.
3. What is the benefit of the IE3 motor on this gearbox?
The IE3 (DRN) motor significantly reduces energy loss during continuous operation. In high-torque applications where the worm stage might generate heat, the higher motor efficiency helps maintain a better overall system thermal balance.
4. Can I get a hollow shaft version of this unit?
If you require a hollow shaft, you should look for the SAF67 or SA67 series. The "SF" prefix specifically denotes the flange-mounted housing with a solid output shaft.
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