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Machines of best fit: OEM recommends vibrating screens

new Terex SI Screen


As the distinctive identities of many products in the crushing and screening sector give way to rationalisation over time, one OEM is staying dedicated to offering the aggregates industry the best of its screens and feeders – across five different brands. John Flynn explains. 

The Terex Minerals Processing Systems group has evolved through combining equipment from the Jaques, Cedarapids, Simplicity, Pegson and Canica brands.

Between them, these five brand names have more than 500 years of operating history and have an enviable record of providing premium feeding, crushing and screening equipment to the quarrying industry worldwide.

Equipment from these brands has continued to be produced and refined under the Terex banner for the past 20 years.

Each quarry site has its own unique conditions in relation to location, raw material characteristics, layout of site and surround and production requirements. As such, a “one size fits all” approach is impractical.

Whereas some global construction companies have heavily rationalised their equipment range after acquisition, Terex MPS has retained and developed the technology of its brands through its growth phase, allowing a “machine of best fit” approach when it comes to recommending equipment for its customers. A good example of this is with the Terex MPS range of vibrating screens.

Terex is a leading name in vibrating screen technology for both inclined and horizontal screens through the Cedarapids, Simplicity and Jaques brands.

After many years of providing an industry-leading linear motion design, Cedarapids pioneered the triple-shaft elliptical motion screening machine. The current Terex TSV also has the unique ability among horizontal screens to be installed at various slopes to resist pegging and enhance control of material velocity.

The primary advantages of the horizontal screen such as the Cedarapids TSV is that it presents a low head height for ease of installation and will outperform an inclined screen of similar size, the high G-force providing the ability to stratify and separate large quantities of material. It is ideal for mobile applications and installation into greenfields crushing plants or new screening stations.

The inclined screen has its own advantages as a cost-effective solution across a broad range of screening applications. From primary scalping to finish screening, fitted with grizzly bars, steel plate, modular or cross-tensioned screen media, screening wet or dry, the inclined screen presents a versatile solution across the full range of screening requirements.

The Terex Simplicity and Jaques Torrent inclined screens are designed for a multitude of applications. Thousands of these inclined screens having been placed into operations in North America, Australasia and South East Asia. A high percentage of these have been as replacement of Terex or competitor units or to fit a specific envelope.

The Simplicity’s screen design produces a balanced vibration to minimise stress and fatigue. The shafts utilised in the Simplicity screens are cut specific to each unit and designed for smooth, reliable operation and the longest service life available. 

The Jaques Torrent screen has been a mainstay of the Australian quarrying industry for many decades, as generations of quarry operators have profited from the high performance, long life and reliable operation of these units.

Now Terex has used all of its screening experience to develop a newly released screen range combining features of the Simplicity and Torrent screen designs. The Terex SI screen is the newest addition to the Terex MPS static screening range. Constructed with ease of maintenance in mind, these screens feature additional clearance between decks, removeable spring base plates, hand-hold access to screen interiors and are built with oversized bearings to ensure maximum performance and longevity. Vibrating motion is provided by a combination of an unbalanced shaft and bolt-on counterweight plates. The shaft provides the bulk of the motion, ensuring smooth operation and minimal transverse movement, which can result in frame failure. The bolt-on counterweight plates facilitate stroke adjustment to finetune screen operation. The screen body and deck construction are engineered to eliminate high stress areas and fatigue allowing for longer service life. 

Huck bolts secure the frame connection with about 10,000psi (each), effectively “joining” together the segments of steel. The screen deck design includes a conversion kit which can adapt standard cross-tensioned screen decks to accommodate modular media. 

Significantly, the Terex SI screen can be ordered with the option of grease or oil lubrication.

Designed around the requirements of Australian quarry operations, the SI screen fits the footprint of the Jaques Torrent screen and is also available in modular arrangements.

For more information, visit

John Flynn is the Australia and New Zealand business manager for Terex Jaques.

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