| Coupling Size | Torque Nm | Max. Speed (RPM) | Bore Dia MIN | Bore Dia MAX | QTY N | A | B | C | D | E | F |
|---|---|---|---|---|---|---|---|---|---|---|---|
| FBC 1 | 77 | 6100 | 12.7 | 30 | 3 | 95 | 79 | 38 | 3 | 44 | 58 |
The Flexible Bolt Coupling FBC 1 is a high-speed, precision-engineered shaft coupling designed for efficient power transmission in light-to-medium duty applications. It connects a driving and a driven shaft, providing a reliable torque transfer while utilizing flexible elements to accommodate minor shaft misalignments and dampen operational shocks.
Nominal Torque Capacity: 77 Nm
Maximum Speed: 6,100 RPM
Bore Diameter Range: 12.7 mm – 30 mm
Quantity of Pins (N): 3
Outer Diameter (A): 95 mm
Overall Length (B): 79 mm
The FBC 1 operates as a pin-and-bush type flexible coupling. It consists of two flanges joined by a set of three high-tensile steel pins fitted with elastomeric (rubber or urethane) bushes. Torque is transmitted from the driving flange to the driven flange through the compression of these flexible bushes.
This design allows the coupling to act as a "mechanical fuse" and vibration isolator. The elasticity of the bushes enables the unit to compensate for angular, parallel, and axial misalignments, ensuring that minor mounting inaccuracies do not lead to premature bearing failure or shaft fatigue.
High-Speed Stability: Engineered to operate safely at speeds up to 6,100 RPM, making it suitable for modern high-speed electric motors.
Vibration Isolation: Effectively dampens torsional vibrations and absorbs shock loads, protecting sensitive driven equipment.
Low Maintenance: Unlike gear couplings, the FBC 1 does not require lubrication, significantly reducing long-term maintenance costs and mess.
Compact Dimensions: With an outer diameter of only 95 mm, it provides a high torque-to-size ratio for applications with limited spatial footprints.
Ease of Inspection: The flexible bushes can be inspected for wear without fully dismantling the drive string, allowing for predictable maintenance scheduling.
Small Centrifugal Pumps: Ideal for water circulation and chemical processing pumps.
Fans and Blowers: Used in HVAC systems and industrial ventilation where high speed and low vibration are critical.
Electric Motor Drives: Standard coupling for small-frame industrial motors.
Gearbox Inputs: Often used on the high-speed input side of speed reducers.
Light Conveyors: Powering small-scale material handling systems in packaging or bottling plants.
Torque Capacity: Ensure the total system torque (including start-up safety factors) does not exceed the 77 Nm rating.
Bore Sizing: Confirm that both the driving and driven shafts fall within the 12.7 mm to 30 mm bore range.
RPM Limits: Verify that the operational speed remains below the 6,100 RPM threshold to prevent centrifugal damage to the bushes.
Alignment Accuracy: While the coupling accommodates misalignment, aligning the shafts as precisely as possible during installation will maximize the lifespan of the elastomeric bushes.
Environmental Compatibility: Check that the bush material is suitable for the ambient temperature and any potential exposure to oil or chemicals in the work area.
The Flexible Bolt Coupling FBC 1 provides a versatile and maintenance-free solution for transmitting up to 77 Nm of torque at high speeds. With its ability to handle bores up to 30 mm and speeds reaching 6,100 RPM, it is a premier choice for protecting bearings and shafts from vibration and misalignment in a wide variety of light industrial applications, including pumps, fans, and small motor drives.
