Product Overview
The Flender H3SH09 is part of the world-leading modular gear unit system, designed to bridge the gap between high-speed motors and heavy industrial machinery. With a 37kW power capacity, the H3SH09 excels in applications that demand high reduction ratios without the heat generation or efficiency losses typical of worm gears. The triple-reduction architecture ensures a smooth transmission of power, utilizing precision-ground helical gears to minimize noise and vibration. Housed in a rigid cast-iron casing, the H3SH09 is designed for longevity in harsh environments like mining, water treatment, and bulk material handling.
Technical Parameter Table
| Parameter | Specification Detail |
| Rated Input Power (Pn) | 37 kW |
| Nominal Torque (T2n) | 23,000 Nm |
| Number of Reduction Stages | 3 Stages |
| Standard Output Shaft Dia. | 120 mm / 140 mm |
| Center Distance | Optimized for Size 09 Frame |
| Efficiency | > 94% (Full Load) |
| Housing Construction | High-Grade Grey Cast Iron (GG25) |
| Approximate Weight | 630 kg |
H3SH09 Specific Highlights
Triple-Stage Load Distribution: The H3SH09 distributes the 37kW input load across three precision gear sets, significantly reducing the pressure on individual teeth and extending the service life of the unit in high-torque scenarios.
Superior Oil Sump Capacity: The size 09 housing is cast with an enlarged internal oil reservoir, which enhances natural heat dissipation and ensures the gear mesh remains fully lubricated even in high-ambient-temperature environments.
Low-Friction Gearing: By utilizing advanced grinding techniques to achieve a DIN Class 4 finish on all gear flanks, the H3SH09 operates with minimal internal resistance, maximizing the 37kW power throughput.
Component Integration & Mounting Flexibility
Integrated Backstop System
For inclined conveyor or elevator applications, the H3SH09 can be equipped with an internal, maintenance-free backstop. This centrifugal-lift-off design ensures that the unit can hold the load in place during power failures without any mechanical wear during normal operation.
Adaptable Input Connections
The unit is designed for maximum versatility. It can be supplied with a standard input shaft for coupling connections or an IEC/NEMA motor adapter bell housing, allowing for a direct-coupled, space-saving gear motor configuration.
Related Model Reference Table
| Model Code | Rated Power (Typical) | Connection Type | Primary Use Case |
| H3SH08 | 22-30 kW | Solid Shaft | Medium Duty Conveying |
| H3DH09 | 37 kW | Hollow Shaft | Shaft-Mounted Applications |
| B3SH09 | 37 kW | Right-Angle | Perpendicular Drive Layouts |
| H3SH10 | 45-55 kW | Solid Shaft | Heavy Duty Material Handling |
Industry Applications
Mining & Minerals: Secondary drive units for belt conveyors and reclaimers.
Water Treatment: Powering large-scale screw pumps, flocculators, and thickeners.
Chemical Processing: Reliable drives for high-viscosity industrial mixers and reactors.
Recycling Industry: Main drive for horizontal shredders and bale compactors.
FAQ
1. Is 37kW the absolute limit for the H3SH09?
37kW is the standard nominal rating. However, the actual permissible power depends on the service factor, gear ratio, and ambient conditions. We can perform a project-specific calculation to verify suitability for your load profile.
2. What type of oil is recommended for the H3SH09?
For most 37kW industrial applications, an ISO VG 220 or 320 mineral oil is standard. For extreme temperatures or to extend maintenance intervals, a synthetic PAO-based lubricant is highly recommended.
3. Does the triple-reduction design affect the noise level?
No. In fact, the H3SH09 is designed with noise-absorbing housing geometry and high-precision helical gears, which keep noise emissions well within industrial standards, even at full 37kW load.
4. How is the H3SH09 protected against dust and moisture?
Standard units feature high-quality radial lip seals. For extremely dusty environments (like cement or mining), we offer Taconite labyrinth seals which provide a grease-purged barrier to protect the internal gears.
5. Can this gearbox be mounted vertically?
The H3SH09 is primarily a horizontal unit. Vertical mounting is possible with specific modifications to the lubrication system, such as an oil expansion tank and potentially forced lubrication for the upper bearings.
6. What is the typical lead time for a brand-direct H3SH09 order?
Depending on the specific transmission ratio and optional extras (like backstops or fans), lead times typically range from 8 to 14 weeks for factory-direct ordering.
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