Product Overview
The Flender B3HH10 is the workhorse of the mid-range industrial agitator sector. In agitation applications, the gearbox must survive constant torque fluctuations and potential fluid-induced vibrations. The B3HH10 addresses these challenges with a high-rigidity Size 10 housing and precision-ground gear teeth that ensure a mechanical efficiency of over 94%. By utilizing a hollow shaft with a Shrink Disk, the unit provides a backlash-free friction connection to the agitator shaft, eliminating the mechanical stress points associated with traditional keyways. This model is specifically tuned for 45kW inputs, ensuring that thermal dissipation and mechanical load-bearing are perfectly balanced for continuous-duty cycles.
Technical Parameter Table
| Parameter | Specification Detail |
| Rated Input Power (P1) | 45 kW |
| Nominal Output Torque (T2n) | 19,000 Nm |
| Gear Stages | 3 (1 Bevel set + 2 Helical sets) |
| Hollow Shaft Bore | 100 mm / 110 mm |
| Casing Material | GG25 Grey Cast Iron (Vibration-damping) |
| Lubrication Type | Splash Lubrication (Standard) |
| Efficiency Rating | ≥ 94% |
Unique Features of the B3HH10 Agitator Drive
Agitator-Specific Bearing Span: The B3HH10 features an optimized internal bearing arrangement designed to absorb the bending moments of long agitator shafts without the need for an external "upper" bearing in many tank configurations.
Friction-Locked Reliability: The shrink disk interface on the B3HH10 creates a high-pressure seal between the hollow shaft and the machine shaft. This prevents fretting corrosion, which is a common failure point in chemical tanks where moisture or vapors are present.
Enhanced Thermal Ribbing: The Size 10 housing is cast with a proprietary external fin pattern. This increases the effective surface area for heat dissipation, allowing the 45kW unit to maintain a lower oil temperature during high-intensity blending sessions without requiring external cooling.
Specialized Agitator Solutions
Sealing & Structural Integration
The B3HH10 can be customized to meet the specific safety and maintenance requirements of chemical plants:
Viton Agitator Seals: For tanks containing aggressive chemicals or operating at higher temperatures, we provide Viton (FKM) dual-lip seals as standard to ensure the 45kW gearbox remains hermetically sealed against corrosive vapors.
Torque Arm with Buffering: For agitators handling high-viscosity fluids (which cause shock loads), we offer a heavy-duty torque arm with integrated elastomer dampers. This protects the gearbox teeth and the 45kW motor from sudden mechanical peaks.
Reinforced Flange Mount: For top-entry agitators, the B3HH10 can be supplied with an oversized output flange that allows the unit to be bolted directly to the tank flange, acting as the primary support for the mixing assembly.
Related Model Reference Table
| Series Model | Configuration | Shaft Type | Typical Power |
| B3HH10 | 3-Stage / Right Angle | Hollow Shaft + Shrink Disk | 45 kW |
| B3SH10 | 3-Stage / Right Angle | Solid Shaft | 45 kW |
| B3HH08 | 3-Stage / Right Angle | Hollow Shaft + Shrink Disk | 22 kW |
| B3HH12 | 3-Stage / Right Angle | Hollow Shaft + Shrink Disk | 90 kW |
| B2HH10 | 2-Stage / Right Angle | Hollow Shaft (Low Ratio) | 55 kW |
Industry Applications
Chemical Processing: Large-scale reactors, blenders, and chemical mixing tanks.
Water Treatment: Flocculators and sludge agitators in clarifier tanks.
Pharmaceuticals: High-purity blending and fermentation tank drives.
Food & Beverage: Industrial dough mixers and syrup agitators.
FAQ
Q1: Why is a hollow shaft with a shrink disk preferred for agitators?
A1: A shrink disk provides a 360-degree friction fit. In agitators, where the shaft can be very long, a keyway often leads to localized stress and "shaft wallowing." The shrink disk eliminates this, ensuring a secure, backlash-free connection that is easier to disassemble.
Q2: Can the B3HH10 handle the weight of a heavy impeller?
A2: The B3HH10 is designed for high torque. While it has robust bearings, we recommend checking the specific axial load of your impeller. For extreme vertical weights, we can provide a reinforced bearing upgrade (EBD version).
Q3: What maintenance is required for a 45kW agitator drive?
A3: Maintenance is minimal. We recommend an initial oil change after 500 hours and thereafter every 10,000 hours for mineral oil. For synthetic oil, this can be extended to 20,000 hours. The shrink disk should also be visually inspected for tightness annually.
Q4: Is the B3HH10 suitable for explosive environments (ATEX)?
A4: Yes, the B3HH10 can be factory-certified for ATEX zones. This includes specialized grounding, anti-static seals, and temperature monitoring to ensure safety in hazardous chemical areas.
Q5: Does this model require an external cooling fan?
A5: For a 45kW load in ambient temperatures below 35°C, the natural convection of the Size 10 housing is usually sufficient. In hotter climates or 100% duty cycles, a shaft-driven fan is a recommended low-cost upgrade.
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