Product Introduction
The SEW-EURODRIVE ML3PSF100 is a heavy-duty, three-stage parallel shaft helical gearbox engineered to handle brutal industrial environments where continuous torque delivery and rock-solid reliability are mandatory. Operating as a critical node in heavy machinery drivetrains, this 132 kW unit bridges the gap between high-speed prime movers and low-speed, high-torque applications.
Designed around a split-housing concept, the ML3PSF100 simplifies routine maintenance and structural inspection without requiring complete teardowns. The helical gear geometry is precision-ground to minimize friction losses, keeping mechanical efficiency exceptionally high across its entire load spectrum. This specific variant thrives in operations where structural rigidity, thermal stability, and precise speed reduction cannot be compromised.
Technical Specifications
| Technical Parameter | Metric Specification | Imperial Equivalent |
| Nominal Input Power | 132 kW | 177 hp |
| Nominal Output Torque | 68,000 to 90,000 Nm | 50,154 to 66,380 lb-ft |
| Standard Ratio Range (i) | 35.5 - 90 | 35.5 - 90 |
| Input Speed | 1500 rpm / 1800 rpm | 1500 rpm / 1800 rpm |
| Output Speed Range | 16 to 50 rpm | 16 to 50 rpm |
| Lubrication Type | Splash Lubrication / Pressure Feed | Splash Lubrication / Pressure Feed |
| Oil Capacity (Approx.) | 115 Liters | 30.3 Gallons |
| Dry Weight (Approx.) | 1,850 kg | 4,078 lbs |
Product Features: Distinctive Highlights for ML3PSF100
Optimized Three-Stage Helical Mesh for Low-Speed Aggregates: Unlike smaller or single-stage variants, the ML3PSF100's specific three-stage reduction kinematics are dynamically balanced to eliminate high-frequency micro-vibrations, ensuring smooth torque transfer at ultra-low output velocities.
Enhanced Structural Rigidity (PSF Foot Geometry): The PSF structural profile features reinforced foot-mounting foundations with localized ribbing designed to absorb extreme reaction forces, directly preventing casing distortion under cyclic shock-loading.
Advanced Internal Oil-Flow Routing: Engineered with dedicated internal ducts that redirect oil directly to the high-speed input bearings, preventing localized thermal spikes without relying on external cooling loops in standard ambient conditions.
Custom Application Solutions & Modular Assembly
Integrated Drive Packages
The ML3PSF100 is engineered for seamless drop-in integration with heavy-duty drive components. To minimize field alignment errors, SEW offers pre-engineered swing bases and steel construction foundations.
Optional Auxiliary Packages
Cooling Upgrades: Integrated water-glycol plate heat exchangers or air-oil cooling fan systems for high thermal load cycles.
Condition Monitoring (DUO/DUV): Vibration sensors and oil aging analysis ports for predictive maintenance scheduling.
Backstops: Mechanical non-reversing lift-off backstops to prevent back-driving in inclined conveyor designs.
RELATED MODEL PARAMETER TABLE
| Model Designation | Frame Size | Mounting/Connection Variant | Power Rating (1500 rpm) | Max Torque Capacity | |
| ML3PSF100 | 100 | Foot Mounted, Solid Shaft | 132 kW | 90 kNm | |
| ML3PSF110 | 110 | Foot Mounted, Solid Shaft | 160 kW | 112 kNm | |
| ML3PSH100 | 100 | Hollow Shaft with Shrink Disc | 132 kW | 90 kNm | |
| ML3PVF100 | 100 | Vertical Flange Mounted | 110 kW | 85 kNm | |
| ML4PSF100 | 100 | 4-Stage High-Ratio Parallel | 45 kW | 90 kNm | |
Industry Applications
Bulk Material Handling: Primary drive systems for heavy-duty inclined belt conveyors, bucket elevators, and stacker-reclaimers.
Mining and Minerals: Driving force behind mid-sized ball mills, rotary kiln feeders, and slurry agitators.
Pulp and Paper: Ideal for heavy log-debarking drums, waste paper pulpers, and industrial mixing vats.
Water and Waste Management: Continuous operation drives for large-scale aeration basins and screw pumps.
FAQ
Q: What does the "PSF" stand for in the ML3PSF100 model code?
A: In SEW nomenclature, P indicates a parallel shaft layout, S specifies a helical gear type, and F denotes a standard foot-mounted housing style with a solid output shaft.
Q: Can this unit be mounted vertically?
A: The ML3PSF100 is specifically designed for horizontal installations. For vertical orientations (input or output shafts pointing straight up or down), you should select the ML3PV series, which incorporates specialized oil drywells and pressure-fed lubrication lines to safeguard upper bearings.
Q: What maintenance schedule is required for the ML3PSF100 under standard conditions?
A: For mineral oil lubricants, oil changes are typically required every 10,000 operating hours or every two years, whichever comes first. Synthetic oils (such as polyalphaolefins) can extend this interval up to 20,000 operating hours. Regular visual checks on seal integrity and oil level plugs should occur monthly.
Q: Is it possible to retrofit a backstop after installation?
A: Yes. The ML3PSF100 features an accessible intermediate shaft extension housing that permits the field installation of an internal, maintenance-free backstop without requiring complete dismantling of the gear sets.
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