Tyre Couplings F220 - Industrial Tyre Couplings

Size	TYPE F & H								TYPE B								A	C	‡ G	† M	No. of screws per flange
Size	Bush No.	Max Bore	L	D	E	F	ξ J	Approx Weight Kg *	Max Bore	Min Bore	L	D	E	F	Set Screw on key	Approx Weight Kg *	A	C	‡ G	† M	No. of screws per flange
F220	5050	127	312	267.0	127	118.0	140	320.0	160	90.00	312	267	127	118.0	M20	312.0	562.0	474	20	56	12

The F220 Tyre Coupling is an ultra-heavy-duty flexible coupling designed for the most rigorous industrial power transmission tasks. As one of the largest standard sizes in the Fenner-style range, the F220 is built to handle massive torque loads while providing the critical elasticity needed to dampen severe shock loads and vibrations in heavy rotating machinery.

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Key Specifications

The F220 delivers exceptional performance for massive drives. Below are the standard technical specifications:

Parameter	Value
Model Size	F220
Nominal Torque	11,600 Nm
Max. Torque (Peak)	33,125 Nm
Max. Rotational Speed	1,100 RPM
Power Rating (at 1000 RPM)	~1,215 kW (approx)
Taper Lock Bush Size	5050
Max. Bore Size	125 mm (with 5050 Bush) / 160 mm (Max with B Flange)
Misalignment Capability	4° Angular \| 5.8mm Parallel \| 7.3mm End Float

How It Works

The F220 operates on the torsionally elastic "shear" principle, utilizing a massive reinforced rubber tyre.

Torque Transmission: The driving hub rotates the flexible tyre, which transmits the immense torque to the driven hub. This non-metallic connection electrically isolates the shafts and eliminates lubrication requirements.
Shock Cushioning: In high-impact applications like primary gyratory crushers, the F220 tyre twists to absorb kinetic energy from load spikes, acting as a buffer that significantly reduces stress on the motor and gearbox shafts.
Misalignment Tolerance: The F220 is designed to handle severe shaft errors—accommodating up to 5.8mm of parallel offset—which reduces radial loads on support bearings caused by thermal expansion or foundation shifts.

Benefits of F220 Couplings

Extreme Torque Capacity: Handles over 11,000 Nm of nominal torque, making it suitable for megawatt-class industrial drives.
Maintenance Efficiency: The split-tyre design allows for easy replacement without moving the heavy motor or driven equipment, drastically reducing downtime during maintenance intervals.
Lubrication Free: Eliminates the need for grease or oil, ensuring a clean operation suitable for abrasive environments like cement or coal handling.
Vibration Isolation: The elastomeric element inherently dampens torsional vibrations, protecting sensitive equipment components from fatigue failure.
Safety: In the event of a catastrophic jam, the tyre acts as a mechanical fuse, disconnecting the drive to save the expensive capital equipment from destruction.

Typical Applications

The F220 is a standard choice for the heaviest industrial sectors:

Mining & Aggregates: Main drives for large SAG mills, ball mills, and primary crushers.
Bulk Handling: Overland conveyor main drives and heavy-duty bucket wheel excavators.
Fluid Power: Massive slurry pumps and large industrial fans.
Metal Processing: Steel rolling mill drives and heavy shears.
General Heavy Industry: Large mixers, agitators, and rubber processing machinery.

Summary

The F220 Tyre Coupling is a powerhouse solution for ultra-heavy-duty drive systems. With a nominal torque rating of 11,600 Nm and the ability to accommodate up to 5.8mm of parallel misalignment, it ensures operational reliability for critical high-value machinery. Its combination of shock absorption, "fit and forget" maintenance, and lubrication-free design makes it an essential component for heavy industrial infrastructure.