Gulf Construction Online - Terex cuts need for secondary screen

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The J-1170AS ... high performance.

Terex cuts need for secondary screen

01 March 2015

Terex Finlay, a global leader in design and manufacture of mobile crushing, screening and recycling solutions, has introduced the new J-1170AS, a high-performance primary mobile jaw crusher.

The model is built around the renowned and aggressive Terex 1,100 mm by 700 mm jaw crusher, with a proven track record
in recycling, aggregate production and mining applications.

“The Terex 1,100 mm by 700 mm jaw chamber provides excellent material reduction and product sizing in the processing of blasted quarry rock and ore material,” says a spokesman for the company. “The jaw chamber is also available with optional hydraulic release, an excellent feature when crushing construction and demolition debris. The hydraulic release option has an automatic overload protection system to prevent damage by uncrushable items in the feed material.”

A key new feature of this model is the on-board detachable sizing screen.

Nigel Irvine, the sales and marketing director, comments: “The J-1170AS with its onboard sizing screen will enable operators to produce a specified product without the need for a secondary screen. The sizing screen can also be detached without the need for additional lifting gear, which means that the machine can be used as ‘straight’ J-1170 jaw crusher, giving the operator versatility for applications that do not require sizing.

“Combining these factors with the excellent crushing capabilities and the ease with which the machine can be transported ensures the demands of owner operators and crushing contractors are easily met.”

The J-1170AS is powered by either a Tier 3/Stage 3A Caterpillar C9 261 kW (350 hp) or a Tier 4i Scania DC9 70A 257 kW (350 hp).

Hydrostatic transmission of the jaw chamber offers operators reversible operation in the event of a blockage. The hydrostatic system also provides variable chamber speed to suit given applications. The crusher features hydraulic assist Chamber CSS (closed side setting) adjustment, and can be changed in a matter of minutes.

The machine has a heavy-duty variable speed vibrating grizzly feeder (VGF) with integrated pre-screen, providing an aggressive action to separate fines material efficiently.

“The variable speed VGF ensures continuous choke feeding of the crushing chamber for optimal productivity. Material from the pre-screen can be diverted to a stock pile via the onboard by-pass conveyor, or join the crushed product on the main belt,” he adds.

The large 9.6-cu-m hopper has hydraulically folding sides and an innovative hydraulic self-locking mechanism to provide efficient and faster machine set-up and tear-down times.