The Flender H3SH15 stands as a cornerstone in heavy-duty transmission technology, bridging the gap between standard industrial gearboxes and specialized mill drives. With its 200kW power rating, the H3SH15 is built to manage the immense internal stresses of large-scale material handling and processing. By utilizing a triple-reduction architecture, the unit achieves extreme ratios without the efficiency drops found in other gear types. Every H3SH15 is constructed with high-alloy, case-hardened helical gears that are flank-ground to ensure a perfect contact pattern, resulting in a drive that is both exceptionally powerful and remarkably quiet.
| 200 kW | |
| Nominal Torque (T2n) | 110,000 Nm |
| 3-Stage Helical | |
| 210 mm / 230 mm | |
| 90 mm / 100 mm | |
| > 94% | |
| Approx. 2,650 kg |
H3SH15 Specific Highlights
High-Torque Torsion Resistance: The H3SH15 housing is engineered with an advanced internal ribbing system specifically designed to resist the "twisting" forces generated by 110,000 Nm of torque, ensuring gears stay aligned under peak loads.
Triple-Stage Thermal Management: Unlike smaller units, the H3SH15 utilizes three stages of gear sets to distribute thermal friction across a larger oil volume, preventing oil film shearing even during continuous high-load operations in hot climates.
The helical gear teeth in the size 15 unit feature specialized longitudinal crowning, which compensates for natural shaft deflection during 200kW power pulses, ensuring an even wear pattern across the entire gear flank.
For inclined conveyors or bucket elevators driven by the H3SH15, an internal, maintenance-free backstop can be integrated. This centrifugal-lift-off design allows for frictionless rotation in the drive direction while providing instantaneous locking in the event of a power failure to prevent load roll-back.
To maximize the 200kW thermal capacity, the H3SH15 is prepared for multiple cooling upgrades:
- High-efficiency fan mounted on the input shaft for enhanced air convection.
- Copper-nickel coils integrated into the oil sump for connection to external water circuits.
- Oil-to-Air External Cooler: A dedicated lubrication unit with a pump and radiator for extreme environments.
| H3SH14 | 160 kW | ||
| H3DH15 | 200 kW | ||
| B3SH15 | 200 kW | Right-Angle | Bevel-Helical Stage |
| H3SH16 | 250-315 kW |
Main drives for high-capacity overland conveyors, apron feeders, and reclaimers.
Driving units for large-scale roller tables, slab shears, and cooling beds.
Powering heavy-duty coal pulverizers and biomass handling systems.
Reliability-focused drives for rotary kilns and ball mill auxiliaries.
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1. Is the 200kW rating sustainable for 24/7 operation?
Yes, the H3SH15 is specifically designed for S1 continuous duty. However, for 24/7 operation at peak load, we recommend a synthetic oil upgrade and verifying the thermal limit based on your local ambient temperature.
2. What type of maintenance is required for the H3SH15 backstop?
The integrated backstop is virtually maintenance-free. Because it uses a centrifugal-lift-off design, the internal wedges do not touch the inner ring during normal high-speed operation, eliminating wear.
3. What is the benefit of a triple-reduction (H3) vs. a double-reduction (H2) unit?
The H3SH15 (H3) allows you to reach much higher transmission ratios (up to 112:1) while keeping the unit compact. It is the most efficient way to achieve slow output speeds without resorting to massive, oversized 2-stage gearboxes.
4. Can the H3SH15 be used in corrosive or maritime environments?
Yes. For these conditions, we provide specialized multi-layer epoxy coatings and stainless steel hardware for external components, along with advanced Taconite seals to block moisture.
5. How is the H3SH15 shipped?
Due to its 2,650 kg weight, the unit is shipped on a heavy-duty steel-reinforced pallet. It is typically shipped dry (without oil) to comply with safety regulations, with all internal parts protected by a VCI corrosion inhibitor.
6. Does the H3SH15 support forced lubrication?
While splash lubrication is standard for horizontal mounting, the H3SH15 is pre-drilled to accept an external oil pump and distribution manifold if your application involves high-speed input or a tilted mounting angle.
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