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Tyler F-Class Vibrating Screen Features Double Eccentric Shaft

The F-Class is ideal for screening situations that require consistent, load independent performance.

Mon May 18, 2015 - National Edition
Construction Equipment Guide

The F-Class is ideal for screening situations that require consistent, load independent performance at constant g-force in all operational modes.
The F-Class is ideal for screening situations that require consistent, load independent performance at constant g-force in all operational modes.

The Tyler F-Class vibrating screen from Haver & Boecker offers a solution for challenging screening applications requiring minimal vibration transmission during operation. This allows for multiple machine use within the same building or structure without the same reinforcing measures required to house traditional vibrating screens. The F-Class also is ideal for screening situations that require consistent, load independent performance at constant g-force in all operational modes.

Featuring a unique and reliable, proven four-bearing technology, the vibrating screen minimizes structural vibration and delivers a consistent stroke, which two-bearing screens cannot provide, and with the right media choice virtually eliminates blinding and pegging. With the ability to handle the toughest applications, the F-Class is designed and built for scalping and classifying ores, minerals, stones, sand and gravel, according to the manufacturer.

The vibrating screen features an advanced eccentric shaft design, supported by four high-performance, double spherical roller bearings. The double eccentric shaft creates a constant positive stroke that handles material volume spikes without losing momentum. As the eccentric shaft turns, the screen body is forced to follow the shaft movement. While it travels upward, the counterbalance weights move in the opposite direction and create an equal force to that generated by the body. As a result, the forces cancel each other, allowing a dynamically balanced system that transmits minimal to no vibrations into the structure. This allows multiple screens to be placed side by side while minimizing the investments into heavy structures. Furthermore, the design keeps noise emissions low for a quieter system and reduced overall plant noise. For these reasons, producers of products such as iron ore, phosphates and limestone use the F-Class in buildings — housing as many as 45 units across eight stories.

The continual circular screening action provided by the eccentric design also produces a constant, optimized g-force. Not only does this further maximize screening efficiency, but it also makes the F-Class an effective solution in both wet and dry applications.

Designed for high-tonnage outputs, the F-Class can process as much as 5,000 tons (4,536 t) per hour while providing fast, accurate sizing of virtually any material ranging in cut size from 6-in. to 20 mesh. In addition to traditional screening, the vibrating screen often is used before primary crushers to screen out fines and eliminate crusher wear. It precisely screens material up to 16 in. (40.6 cm).

To provide maximum versatility, the F-Class can operate with as many as three screen decks. The unit features inclines from 15 to 25 degrees and comes with a base frame that allows for simple installation in a customer’s existing structure.

The F-Class features a rugged Huck-bolted screen body fastening, allowing for extra strength and rigidity. Side plates are constructed with high-strength carbon steel. A reinforced plate strengthens the shaft and ties together the side plate, screen panel and shaft assembly.

Every F-Class vibrating screen is born from substantial engineering experience. All screens undergo extensive testing, inspections and vibration analysis prior to shipping. These inspections ensure proper workmanship, correct balance and smooth operation. During commissioning on site, the screen is again tested to make sure it achieves optimal performance within the customer’s specific operation and performance targets. Additionally, Haver & Boecker offers the Tyler Pulse vibration analysis program to monitor the ongoing health of the machine through real-time views, logged reports and data analysis, according to the manufacturer.

The F-Class is backed by a standard 18-month warranty from the date of shipment, 12 months from the installation date or 6,000 operation hours — whichever comes first. This warranty can be increased with optional customer-specific warranty upgrade packages. A 36-month warranty package is available.

For more information, call 800/325-5993 or visit

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