| Coupling Size | Torque Nm | Max. Speed (RPM) | Bore Dia MIN | Bore Dia MAX | QTY N | A | B | C | D | E | F |
|---|---|---|---|---|---|---|---|---|---|---|---|
| FBC 11 | 23780 | 1080 | 110 | 195 | 20 | 530 | 406 | 200 | 6 | 285 | 212 |
The Flexible Bolt Coupling FBC 11 represents the entry into the "Super-Heavy" category of the FBC range. With a massive 545 mm outer diameter and an eighteen-pin configuration (N=18), it is designed to transmit a nominal torque of 26,146 Nm. This coupling is the primary choice for ultra-large industrial drives where massive power and shaft diameters up to 210 mm are the standard.
Nominal Torque Capacity: 26,146 Nm
Maximum Speed: 1,050 RPM
Bore Diameter Range: 115 mm – 210 mm
Quantity of Pins (N): 18
Outer Diameter (A): 545 mm
Overall Length (B): 432 mm
The FBC 11 utilizes eighteen reinforced steel pins distributed across a wide-diameter flange. At this scale, the mechanical leverage provided by the 545 mm outer diameter allows for the transmission of over 26 kNm of torque through the compression of heavy-duty elastomeric bushes.
The design is engineered to handle massive inertial loads. The 18 bushes act as high-capacity shock absorbers, smoothing out the torque fluctuations that occur in primary industrial drives. The 6 mm axial gap (Dimension D) is strictly maintained to allow the enormous drive shafts to expand thermally without creating axial thrust on the motor or gearbox bearings.
Incredible Torque Capacity: Transmits 26,146 Nm, providing the strength required for the world's most demanding primary movers.
Large Bore Support: Accommodates massive shafting up to 210 mm, common in large-scale hydroelectric, mining, and steel mill applications.
Zero Maintenance: Unlike fluid or gear couplings of this size, the FBC 11 requires no lubrication, significantly reducing the "Total Cost of Ownership" (TCO) over the life of the machine.
Torsional Buffering: Protects sensitive gear teeth and drive components from the violent shock loads associated with material blockages or emergency stops.
Redundant Reliability: The 18-pin layout ensures that even in the event of bush wear, the coupling remains a safe and stable link until the next major overhaul.
Primary SAG Mills: Standard drive coupling for massive ore-grinding mills in the global mining industry.
Large Water Distribution Turbines: Connecting massive motors to municipal water pumps and lift stations.
Heavy-Duty Steel Rolling Stands: Driving the primary rollers used in the production of heavy plate and structural steel.
Main Drive Conveyors: Powering the primary pulleys of long-distance overland conveyors carrying high-tonnage bulk materials.
Marine Thrusters: Providing the high-torque connection for primary propulsion units on large industrial vessels.
Speed Ceiling: The maximum speed is 1,050 RPM. This is optimized for slow-speed, high-pole motors (8, 10, or 12-pole) or geared output drives.
Deep Hub Engagement (Dimension C): The 213 mm hub depth is the deepest in the standard range. It is essential that the shaft is fully inserted and the keyway is precision-machined to distribute the 26 kNm load safely.
Rigging Requirements: At 545 mm in diameter, the FBC 11 is a massive assembly. Professional rigging, overhead cranes, and laser alignment systems are required for a safe installation.
Alignment Precision: Even at this scale, the coupling's lifespan depends on precise alignment. Ensuring that the 18 pins share the load equally prevents premature heat buildup in the elastomeric elements.
The Flexible Bolt Coupling FBC 11 is an industrial titan. Offering 26,146 Nm of torque capacity and supporting bores up to 210 mm, it is a robust, maintenance-free solution for the most powerful drive systems in existence. Its pin-and-bush design offers a simple yet extremely effective way to isolate vibration and protect massive industrial investments from the stresses of high-torque operation.
