Tyre Couplings F80 - 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
F80	2012	50	111	95.0	32	53.0	47	9.2	65	25.40	149	95	51	53.0	M10	12.0	211.0	167	10	47	6

The F80 Tyre Coupling is a substantial flexible coupling built for heavy-duty industrial power transmission. With a nominal torque capacity exceeding 300 Nm, the F80 is designed to bridge the gap between medium and heavy application requirements, providing a robust connection that protects drive systems from the damaging effects of shock loads and vibration.

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Key Specifications

The F80 delivers reliable power transmission for larger shaft sizes. Below are the standard technical specifications:

Parameter	Value
Model Size	F80
Nominal Torque	311 Nm
Max. Torque (Peak)	778 Nm
Max. Rotational Speed	3,100 RPM
Power Rating (at 1440 RPM)	~47 kW (approx)
Taper Lock Bush Size	2012
Max. Bore Size	50 mm (with 2012 Bush) / 75 mm (Max with B Flange)
Misalignment Capability	4° Angular \| 2.0mm Parallel \| 2.6mm End Float

How It Works

The F80 employs a flexible "tyre" element clamped between two metal flanges to transmit rotary motion.

Torque & Damping: The motor rotates the input flange, twisting the rubber tyre to drive the output flange. This twisting action cushions the drivetrain, absorbing energy from hard starts or jams.
Shaft Protection: By absorbing shock loads, the F80 reduces the stress placed on motor shafts and keyways, preventing fatigue failures.
Misalignment Tolerance: The F80's larger tyre profile allows it to accommodate significant shaft errors (up to 2.0mm parallel offset) without generating excessive reaction forces on bearings.

Benefits of F80 Couplings

Heavy Duty Performance: Capable of handling peak loads up to 778 Nm, making it suitable for high-inertia machinery.
Reduced Downtime: The "split" tyre design allows for rapid replacement in-situ, eliminating the need to realign the motor or pump during maintenance.
Lubrication Free: Requires no grease, oil, or seals, ensuring a clean operation and lower long-term maintenance costs.
Vibration Isolation: The natural rubber element effectively dampens torsional vibration, resulting in quieter and smoother equipment operation.
Safety: Provides electrical isolation between shafts and acts as a mechanical fuse in overload situations.

Typical Applications

The F80 is commonly found in demanding sectors such as mining, steel, and manufacturing:

Crushers & Screens: Secondary crushers and vibrating screens in quarries.
Heavy Conveyors: Inclined belt conveyors handling aggregates or coal.
Mixers: Large industrial dough or chemical mixers with high starting torques.
Compressors: Large reciprocating compressors requiring vibration damping.
Cranes & Hoists: Travel drives where shock absorption is essential.

Summary

The F80 Tyre Coupling is a powerhouse component for systems requiring up to 47 kW of power transmission (at 1440 RPM). Its ability to handle 311 Nm of nominal torque while forgiving up to 2.0mm of misalignment makes it an indispensable asset for protecting heavy machinery. For facility managers seeking a low-maintenance, high-reliability coupling, the F80 is the industry-proven choice.