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April 11, 2023 nflg 0 Comments

Increased capacity, power and wear adjustment is what Jaques SG 1200 Secondary Gyratory crushers deliver. The SG 1200 features a large stroke, a spherical plain spider bearing, a constant feed opening crushing chamber and a large product discharge area.

Full Factory Warranty

You can rely on Teres Jaques quality parts and installation with a full factory warranty on the plant from installation date. Plus Jaques 24 hours, 7 days a week service and spare parts bakup.

Jaques Gyratory Crushers Benefits & Features :

  • Power capacity 250kW.
    • Increased throughput.
  • Field adjustable crushing stroke
    • Increased throughput.
  • Wear adjustment increased
    • More efficient use of manganese.
  • Constant feed opening crushing chamber.
    • Improved life and efficiency.
  • Concave retained within top shell totally independent of the bottom shell.
    • Concave can be installed in the top shell remotely from the machine, enabling ease of maintenance.
  • Increased bottom shell product discharge area.
    • Improved product discharge and increased capacity.
  • Spherical plain spider bearing.
    • Longer bearing life, minimises stroke loss caused by bearing wear. Extended life of eccentric and bushings due to improved alignment.
  • Hydraulically assisted upper concave removal (optional).
    • Ease of maintenance.

A gyratory crusher is similar in basic concept to a jaw crusher , consisting of a concave surface and a conical head; both surfaces are typically lined with manganese steel surfaces. The inner cone has a slight circular movement, but does not rotate; the movement is generated by an eccentric arrangement. As with the jaw crusher, material travels downward between the two surfaces being progressively crushed until it is small enough to fall out through the gap between the two surfaces. A gyratory crusher is one of the main types of primary crushers in a mine or ore processing plant. Gyratory crushers are designated in size either by the gape and mantle diameter or by the size of the receiving opening. Gyratory crushers can be used for primary or secondary crushing. The crushing action is caused by the closing of the gap between the mantle line (movable) mounted on the central vertical spindle and the concave liners (fixed) mounted on the main frame of the crusher. The gap is opened and closed by an eccentric on the bottom of the spindle that causes the central vertical spindle to gyrate. The vertical spindle is free to rotate around its own axis. The crusher illustrated is a short-shaft suspended spindle type, meaning that the main shaft is suspended at the top and that the eccentric is mounted above the gear. The short-shaft design has superseded the long-shaft design in which the eccentric is mounted below the gear.

The gyratory crushing principle was the basis of several rudimentary designs, patented between 1860 and 1878, none of which embodied practical mechanical details-at least, not in the light of our present-day knowledge of the art. The, in 1881, Philetus W. Gates was granted a patent on a machine which include in its design all of the essential features of the modern gyratory crusher. The first sale of record antedates the patent by several months, a N° 2 crusher, sold to the Buffalo Cement Co. in 1880.

An interesting sidelight of these early days occurred in 1883 at Meriden, Conn., where a contest was staged between a Blake jaw crusher and a Gates gyratory crusher. Each machine was required to crush 9 cu. Yd. of stone, the feed-size and discharge settings being similar. The Gates crusher finished crusher finished its quota in 20 ½ minutes, which must have been a sad disappointment to the proponent of the Blake machine, who happened to be the challenger.

For some years after these pioneer machines were developed, requirements, viewed in the light of present practice, were very simple. All mining practice, were simple. All mining and quarrying, whether underground or open-pit, was done by hand; tonnages generally were small, and product specifications simple and liberal.

In the milling of precious metal ores, stamp as the final reduction machine. These were generally fed with an ore size that could be produced handily by one break through the small gyratory and jaw crushers which served as primary breakers. Even in large underground mining operations there was no demand for large crushers; increased tonnage requirements were met by duplicating the small units. For example, at the huge Homestake operation in 1915 there were o less than 22 small Gates gyratory crushers sizes Nos. 5 and 6 to prepare the ore for the batteries of some 2500 stamps.

Most commercial crushed-stone plants were small, and demand for small, and demand for small product sizes practically non existent. Many plants limited output to two or three products. Generally the top size was about 2 1/2- or 3-in. ring-size; an intermediate size of about 1 1/2 in., or thereabouts, might be made, and the dust, or screenings, removed through openings of about ¼ in. In ballast plants the job was even more simple, one split and an oversize recrush being all that was needed.

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