| Coupling Size | Torque Nm | Max. Speed (RPM) | Bore Dia MIN | Bore Dia MAX | QTY N | A | B | C | D | E | F |
|---|---|---|---|---|---|---|---|---|---|---|---|
| FBC 9A | 13274 | 1400 | 80 | 162 | 15 | 410 | 336 | 165 | 6 | 240 | 200 |
The Flexible Bolt Coupling FBC 9A represents the extreme upper end of the FBC series. While it shares the massive 420 mm outer diameter of the standard FBC 9, it utilizes a twenty-four-pin configuration (N=24) to push its torque capacity to a staggering 15,903 Nm. This coupling is engineered for the absolute heaviest industrial drives where shaft diameters reach up to 180 mm and downtime is not an option.
Nominal Torque Capacity: 15,903 Nm
Maximum Speed: 1,350 RPM
Bore Diameter Range: 80 mm – 180 mm
Quantity of Pins (N): 24
Outer Diameter (A): 420 mm
Overall Length (B): 331 mm
The FBC 9A utilizes a high-density array of twenty-four high-tensile steel pins. By distributing nearly 16 kNm of torque across 24 separate points, the stress on each individual elastomeric bush is significantly reduced compared to lower pin-count models.
The torque is transferred from the driving flange to the driven flange through the uniform compression of these 24 bushes. This configuration provides the highest level of torsional resilience in the series, allowing it to act as a massive shock absorber for the world's largest motors and gearboxes. The 6 mm axial gap (Dimension D) remains standard to allow for the significant axial movement often found in high-output primary movers.
Ultra-High Torque Density: Delivers nearly 16,000 Nm within a 420 mm frame, offering a compact solution for extremely high-power applications.
Maximum Redundancy: With 24 pins, the coupling is incredibly resilient; it can withstand the wear of multiple bushes over time without compromising the immediate safety or balance of the drive.
Extensive Bore Capacity: Accommodates shafts up to 180 mm, fitting the largest industrial output shafts in heavy industry.
Superior Harmonic Damping: The sheer volume of elastomer across 24 contact points makes this coupling exceptional at neutralizing low-frequency vibrations and peak torque spikes.
Zero Lubrication: Operates entirely dry, which is a major advantage in remote mining sites, cement plants, or large-scale pumping stations where grease maintenance is difficult.
Primary Crushers and SAG Mills: Designed for the most violent torque environments in the mining and aggregate sectors.
Massive Industrial Fans: Powering the largest mine ventilation and steel mill exhaust systems.
High-Capacity Slurry Pumps: Used in industrial dredging and large-scale waste management.
Primary Mill Drives: Connecting massive electric motors to primary reduction gearboxes in metal and paper production.
Overland Belt Conveyors: Providing the necessary starting force for high-tonnage material transport systems spanning several kilometers.
Speed Constraints: The maximum speed is 1,350 RPM. It is strictly for large-frame, low-to-medium speed motors (6-pole, 8-pole, or slower).
Massive Hub Engagement (Dimension C): The 162.5 mm hub length requires precision-cut keyways and full shaft insertion. At 15,903 Nm, even minor keyway inaccuracies can lead to localized material failure.
Critical Logistics: The FBC 9A is an extremely heavy assembly. Heavy-duty overhead cranes, specialized rigging, and professional laser alignment are mandatory for installation.
Axial Float Monitoring: In massive systems, thermal expansion of the shafts can be significant; ensure the 6 mm gap is accurately set during cold alignment.
The Flexible Bolt Coupling FBC 9A is the ultimate power transmission link for large-scale industrial machinery. With its 24-pin design and 15,903 Nm torque capacity, it provides unmatched reliability and vibration protection. It stands as a robust, maintenance-free sentinel for the most powerful and expensive industrial drive trains in existence.
