| Coupling Size | Torque Nm | Max. Speed (RPM) | Bore Dia MIN | Bore Dia MAX | QTY N | A | B | C | D | E | F |
|---|---|---|---|---|---|---|---|---|---|---|---|
| FBC 10A | 18050 | 1200 | 100 | 185 | 17 | 480 | 386 | 190 | 6 | 270 | 212 |
The Flexible Bolt Coupling FBC 10A represents the heavy-duty pinnacle of the FBC series. While it utilizes the same 475 mm frame size as the FBC 10, it increases the pin density to twenty-four pins (N=24). This configuration maximizes the torque transmission capability to a massive 22,145 Nm, making it the definitive choice for the most powerful industrial drive strings in existence.
Nominal Torque Capacity: 22,145 Nm
Maximum Speed: 1,200 RPM
Bore Diameter Range: 100 mm – 190 mm
Quantity of Pins (N): 24
Outer Diameter (A): 475 mm
Overall Length (B): 381 mm
The FBC 10A utilizes a high-density array of twenty-four high-tensile steel pins. By distributing over 22,000 Nm of torque across two dozen separate points, the coupling achieves an incredibly smooth and stable power transfer.
The 24 elastomeric bushes work in parallel to absorb torsional energy. This design is specifically engineered for "high-inertia" systems where the motor must overcome massive resistance during startup. The 6 mm axial gap (Dimension D) is critical at this scale to accommodate the significant thermal expansion and axial "hunting" common in large-frame industrial machinery.
Ultimate Torque Density: Delivers the highest torque rating in the standard series (22,145 Nm) within the 475 mm diameter envelope.
Maximum Fail-Safe Redundancy: With 24 pins, the coupling provides the highest degree of operational security; even with multiple worn bushes, the drive integrity remains intact until a scheduled shutdown.
Exceptional Vibrational Damping: The sheer surface area of the 24 bushes makes this unit a superior isolator for low-frequency oscillations and massive shock loads.
Massive Bore Capacity: Supports shafts up to 190 mm, fitting the primary movers of the world's largest industrial plants.
Lubrication-Free Maintenance: Unlike gear couplings of similar capacity, the FBC 10A requires no grease, eliminating a major maintenance point and potential point of failure.
Primary SAG Mills & Ball Mills: The standard for massive ore-grinding operations in the mining industry.
Large-Scale Steel Rolling Mills: Providing the necessary torque to deform and shape heavy steel sections.
High-Output Hydro-Turbines: Connecting large water turbines to their respective generators.
Main Drive Conveyor Pulleys: Powering high-capacity, multi-kilometer overland conveyor systems.
Heavy-Duty Crushers: Ideal for primary rock and mineral crushing where extreme shock loads are a daily occurrence.
Operational Velocity: The maximum speed is 1,200 RPM. This unit is strictly for high-torque, lower-speed applications (8-pole, 10-pole, or geared motor drives).
Extreme Hub Engagement (Dimension C): The 187.5 mm hub depth requires precision-fit keys and long shaft extensions. At 22,145 Nm, any looseness in the keyway will lead to catastrophic metal fatigue.
Rigging and Logistics: The FBC 10A is an exceptionally heavy assembly. Installation requires heavy-duty overhead cranes, specialized rigging equipment, and precision laser alignment to ensure all 24 pins share the load equally.
Environmental Tolerance: Ensure the bush material is specified for the ambient conditions, especially if the coupling is exposed to extreme temperatures or industrial chemicals.
The Flexible Bolt Coupling FBC 10A is the absolute powerhouse of the pin-and-bush range. With a 24-pin design and a staggering 22,145 Nm torque capacity, it is built to protect the largest industrial investments on the planet. For engineers managing massive pumps, mills, or conveyors, it offers an unrivaled combination of strength, vibration isolation, and maintenance-free reliability.
