Tyre Couplings F250 - 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
F250	-	-	-	-	-	-	-	-	190	100.00	360	290	150	125.0	M20	500.0	628.0	532	25	60	12

The F250 Tyre Coupling is the massive flagship model of the flexible tyre coupling range, engineered for the most extreme power transmission challenges in heavy industry. Designed to transmit colossal torque loads, the F250 is the ultimate solution for connecting the largest industrial motors to critical machinery where failure is not an option.

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Key Specifications

The F250 represents the pinnacle of standard tyre coupling performance. Below are the technical specifications:

Parameter	Value
Model Size	F250
Nominal Torque	14,675 Nm
Max. Torque (Peak)	42,740 Nm
Max. Rotational Speed	1,000 RPM
Power Rating (at 960 RPM)	~1,475 kW (approx)
Taper Lock Bush Size	5050
Max. Bore Size	125 mm (with 5050 Bush) / 190 mm (Max with B Flange)
Misalignment Capability	4° Angular \| 6.0mm Parallel \| 7.7mm End Float

How It Works

The F250 operates on the proven "shear" principle, scaled up for massive loads.

Torque Transmission: The drive force is transmitted through a heavy-duty, reinforced elastomer tyre clamped between two steel flanges. This flexible link isolates the motor from the driven machine, eliminating metal-to-metal contact.
Shock Absorption: In applications like large autogenous (AG) mills or crushers, the F250 tyre acts as a giant shock absorber. It twists to cushion sudden load spikes, preventing the "hammer blow" effect from destroying gear teeth and shafts.
Misalignment Tolerance: The F250 offers industry-leading flexibility, accommodating up to 6.0mm of parallel offset. This capability is vital for large machinery where thermal growth and foundation settling are unavoidable.

Benefits of F250 Couplings

Maximum Torque Density: Delivers nearly 15,000 Nm of nominal torque, making it suitable for multi-megawatt drive systems.
Reduced Downtime: The split-tyre design allows for element replacement in-situ. Maintenance teams can change the tyre without lifting the heavy motor or gearbox, saving significant crane time and labor.
Lubrication Free: Requires no grease or oil, making it ideal for abrasive environments like iron ore processing or cement plants where contaminants would destroy lubricated couplings.
Vibration Damping: The elastomeric construction dampens torsional vibration, ensuring smooth power delivery and protecting sensitive equipment.
Asset Protection: The tyre acts as a mechanical fuse; in the event of a catastrophic blockage, it will tear to disconnect the drive, sacrificing itself to save the motor and gearbox.

Typical Applications

The F250 is deployed exclusively in heavy-duty industrial operations:

Mining: Main drives for AG mills, SAG mills, and large ball mills.
Crushing: Primary gyratory and jaw crushers.
Bulk Handling: Main drives for overland conveyors and ship unloaders.
Metal Processing: Steel rolling mill stands and heavy coilers.
Marine: Large dredge pump drives and propulsion shaft connections.

Summary

The F250 Tyre Coupling is the definitive choice for the heaviest industrial power transmission needs. With a nominal torque rating of 14,675 Nm and the capacity to accommodate significant misalignment and shock loads, it provides unmatched protection for your most valuable machinery. When the application demands extreme durability and "fit and forget" reliability, the F250 is the industry standard.