FCL Pin and Bush Couplings: Simple, Robust, and Reliable

The FCL Pin and Bush coupling is a classic flexible shaft coupling known for its simple construction, ease of maintenance, and excellent reliability in general-purpose applications. It is designed to transmit torque between two shafts, while also absorbing shock loads and accommodating small amounts of misalignment.

This makes it a cost-effective and dependable choice for connecting motors and machinery across a wide range of industries.

How It Works: A Simple and Effective Design

The FCL coupling consists of two main components:

1. Two Cast Iron Flanges: One flange is fitted with a series of drive pins. The other flange has a corresponding series of holes.

2. Flexible Rubber Bushes: Each drive pin is fitted with a durable rubber bush. When the coupling is assembled, these bushes fit into the holes of the opposing flange.

Torque is transmitted through the pins, but the flexible rubber bushes act as a cushion. This simple mechanism is what gives the pin and bush coupling its key advantages.

Key Features & Advantages

• Simple Design & Easy Maintenance: With no complex parts, installation is straightforward. Maintenance is as simple as replacing the pins and rubber bushes, which can be done quickly and at a low cost without moving the machinery.

• Vibration and Shock Damping: The rubber bushes are excellent at absorbing torsional vibrations and softening the impact of shock loads, protecting bearings, seals, and gears in connected equipment.

• Accommodates Misalignment: The flexible nature of the bushes allows the coupling to compensate for small parallel, angular, and axial shaft misalignments.

• Cost-Effective Solution: The simple design and use of common materials make the FCL coupling an economical choice for many standard power transmission duties.

• Torsionally Flexible: It provides a "soft" connection that is ideal for applications with uneven torque or frequent starts and stops.

Quality Construction for Long Service Life

• Flanges: Made from high-grade Cast Iron (HT250) for excellent strength and rigidity.

• Pins: Manufactured from high-quality Carbon Steel for reliable torque transmission.

• Bushes: Made from a durable Rubber (NBR) compound that is resistant to oil and offers excellent damping properties.

Common Industrial Applications

The FCL Pin and Bush coupling is a versatile workhorse, perfectly suited for light to medium-duty applications, including:

• Pumps

• Fans and Blowers

• Compressors

• Conveyor Drives

• Mixers and Agitators

• General Industrial Machinery

Get Your FCL Coupling Quote

Provide us with your power, speed, and shaft size requirements, and our team will help you select the right FCL coupling for your application. Contact us for a technical consultation and pricing.