Product Overview
The Flender B2SH12 is the workhorse of the mid-to-high power range. By utilizing a spiral bevel gear set for the initial stage and high-precision helical gears for the second stage, it achieves an optimal balance of noise reduction and mechanical efficiency. The Size 12 housing is specifically cast to withstand the massive internal forces generated by a 160kW input, making it a staple in the heavy processing industries. Its modular architecture ensures that it can be adapted with various cooling and lubrication systems to suit specific climate zones and duty cycles.
Technical Parameter Table
| Parameter | Specification |
| Input Power (P1) | 160 kW (at 1500 RPM) |
| Nominal Output Torque (T2n) | 28,000 Nm |
| Shaft Arrangement | Right Angle (Input to Output 90°) |
| Output Shaft Diameter | 120mm / 130mm |
| Efficiency Rate | ≥ 96% |
| Oil Volume | Approx. 35 - 42 Liters |
| Net Weight | Approx. 1750 kg |
Unique Features of the B2SH12
Advanced Surface Hardening: The gears in the B2SH12 undergo a specialized carbonitriding process followed by precision grinding. This creates a "hard-shell, tough-core" structure that is uniquely resistant to the pitting and micro-pitting common in 160kW continuous-load cycles.
High-Rigidity "Box" Housing: The size 12 frame features a proprietary internal ribbing structure. This design significantly reduces housing deformation under peak shock loads, ensuring the gear mesh remains perfectly aligned even during emergency stops or high-inertia starts.
Modular Sealing Concept: This model supports the "Flender Protect" sealing system, which includes a combination of dust-proof labyrinths and pressure-resistant oil seals, specifically designed to eliminate "breathing" leaks in outdoor, high-temperature installations.
Installation & Lubrication Solutions
System Integration
The B2SH12 is built for versatile plant integration. Our engineering team provides several "Ready-to-Install" configurations:
Forced Lubrication Systems: For applications where the gearbox operates at very low input speeds or in extreme heat, we provide an integrated motor-pump unit that ensures oil reaches the upper bearings and gear meshes.
External Heat Exchangers: To maintain the 160kW thermal equilibrium, the B2SH12 can be linked to air-oil or water-oil cooling circuits via pre-drilled ports in the housing.
Torque Arm Assembly: For plants requiring a semi-flexible mount, a heavy-duty torque arm can be integrated to absorb start-up shocks and prevent foundation cracking.
Related Model Reference Table
| Series Model | Mounting Style | Output Shaft | Power Class |
| B2SH12 | Foot Mounted | Solid Shaft | 160 kW |
| B2DH12 | Shaft Mounted | Hollow Shaft | 160 kW |
| B2SH11 | Foot Mounted | Solid Shaft | 132 kW |
| B2SH13 | Foot Mounted | Solid Shaft | 200 kW |
| B3SH12 | Foot Mounted | Solid Shaft (3-Stage) | 110 kW (High Ratio) |
Industry Applications
Cement & Minerals: Primary drives for bucket elevators and medium-sized ball mills.
Steel Industry: Roller table drives and cooling bed conveyors.
Port Machinery: Heavy-duty hoisting units and ship loaders.
Sugar Industry: Large-scale cane shredders and diffuser drives.
FAQ
Q1: Can the B2SH12 be mounted vertically?
A1: While the B2SH12 is primarily designed for horizontal mounting, a vertical variant (B2SV12) is available with a modified oiling system and "drywell" output to prevent leakage.
Q2: What type of oil is recommended for a 160kW load?
A2: We typically recommend high-performance synthetic gear oils (ISO VG 220 or 320) to ensure the film strength remains stable under the high thermal loads associated with this power class.
Q3: How does the B2SH12 handle reversing loads?
A3: The precision-ground gears and high-tensile shaft materials are designed to manage full torque in both directions, provided the backlash is monitored during periodic maintenance.
Q4: Is it possible to retrofit a fan for extra cooling?
A4: Yes, the B2SH12 has a standardized input shaft extension that allows for the easy field-mounting of a high-velocity mechanical fan.
Q5: What is the expected lifespan of the bearings?
A5: Under standard operating conditions and a service factor of 1.5, the bearings are designed for an L10h life of 50,000 to 100,000 hours, depending on maintenance quality.
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