Tyre Couplings F90 - 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
F90	2517	60	140	110.0	45	59.5	50	15.0	76	31.75	164	110	57	59.5	M12	15.0	235.0	188	13	50	6

The F90 Tyre Coupling is a high-capacity flexible coupling designed for heavy industrial machinery. Delivering a significant increase in power transmission over the F80, the F90 is engineered to handle high-torque applications while providing the exceptional shock absorption and misalignment capabilities that make tyre couplings indispensable in harsh environments.

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Key Specifications

The F90 is built for heavy-duty performance. Below are the standard technical specifications:

Parameter	Value
Model Size	F90
Nominal Torque	513 Nm
Max. Torque (Peak)	1,283 Nm
Max. Rotational Speed	2,800 RPM
Power Rating (at 1440 RPM)	~77 kW (approx)
Taper Lock Bush Size	2517
Max. Bore Size	60 mm (with 2517 Bush) / 90 mm (Max with B Flange)
Misalignment Capability	4° Angular \| 2.4mm Parallel \| 3.0mm End Float

How It Works

The F90 relies on a "shear-type" design where torque is transmitted through a reinforced rubber tyre element.

Torque Transmission: The driving flange rotates the rubber tyre, which transmits the force to the driven flange. This non-rigid connection eliminates metal-to-metal wear.
Shock Cushioning: In high-impact applications (like rock crushers), the F90 tyre twists to absorb kinetic energy, smoothing out the load and preventing shaft damage.
Misalignment Handling: The F90 is designed to accommodate substantial errors in shaft alignment—up to 2.4mm parallel offset—reducing the side loads on bearings and seals.

Benefits of F90 Couplings

High Torque Capacity: Handles over 500 Nm of nominal torque, making it suitable for motors up to ~75kW.
Maintenance Efficiency: The split tyre element can be replaced in minutes without unbolting the motor or driven machine, minimizing downtime.
Lubrication Free: No grease or oil is required, making it a clean solution suitable for dirty or dusty environments.
Vibration Damping: The elastomeric construction dampens noise and vibration, extending the lifespan of connected equipment.
Safety: In the event of a severe seizure, the tyre will tear, disconnecting the drive and protecting the expensive motor and gearbox from catastrophic failure.

Typical Applications

The F90 is a standard choice for heavy-duty applications requiring reliable power transmission:

Mining Equipment: Ball mills, crushers, and vibrating screens.
Fluid Handling: Large slurry pumps and reciprocating compressors.
Material Handling: Heavy-duty belt conveyors and bucket elevators.
Manufacturing: Extruders, mixers, and paper mill machinery.
Metal Processing: Roller table drives and shears.

Summary

The F90 Tyre Coupling is a robust and reliable solution for heavy-duty power transmission. With a nominal torque rating of 513 Nm and the ability to accommodate up to 2.4mm of parallel misalignment, it provides superior protection for your machinery. Whether handling shock loads or vibration, the F90 offers the durability and low-maintenance operation required for critical industrial systems.