Kemach Equipment has introduced the new McCloskey J35R to the local market. The compact jaw crusher punches above its weight with the ability to meet big crushing requirements at sites where space is at a premium. It fits the bill for small-scale recycling contractors seeking a solution for crushing both abrasive and non-abrasive materials, writes Munesu Shoko.



Suited particularly to construction, demolition recycling, asphalt recycling and aggregates, the J35R compact jaw crusher is the perfect solution for projects with small footprints but big requirements, states Bradley Karolus, sales specialist at Kemach Equipment.

Speaking to Quarrying Africa, Karolus says the J35R addresses a special need in the market, especially in the recycling industry where impact crushers have traditionally been the only available solution for small-scale projects. The downside is that impact crushers are better suited to non-abrasive material, which makes it difficult for contractors to deploy the same machines to crush abrasive material.

“With impactors, contractors are limited to less wearing material such as coal and rubble. It becomes difficult when they win contracts to crush high wearing material such as blue rock and chrome slag. These materials are high wearing because of their abrasive nature and are therefore suited to a jaw crusher. From a cost perspective, deploying an impact crusher in abrasive applications is not a good idea, because your cost per tonne will increase,” explains Karolus.

The J35R offers the best of both worlds – it allows contractors to move between abrasive and non-abrasive jobs using one machine.

Features and benefits

Weighing in at 26,5 t and less than 2,5 m wide, the J35R is said to be one of the first jaw crushers of its weight and size in the market with a large opening of 900 × 600 mm. The jaw takes a maximum feed size of 400 mm, with a minimum closed side setting (CSS) of 40 mm. It has a production capacity of between 250 and 300 tph.

The J35R can easily crush and move at the same time, ensuring maximum mobility and productivity on project sites. A two-speed system is selectable at the control panel which enables a smooth start/stop.

The machine is said to be the only jaw of this size to have the recirculating option. The recirculation conveyor allows operators to produce a crushed and screened final product using only the one machine.

“Combining the productivity of the J35R with the versatility of a full screening and recirculating system allows operators to produce a crushed and screened final product with just one machine,” he says. “This design approach makes the process cost-effective by removing the need for two separate machines.”

Another key talking point is the post screen, which offers a number of benefits. With a 55 mm mesh, for example, the post screen allows contractors to produce G5 material without having to close the CSS beyond its design limits.

“Traditionally, contractors have had to close the jaw’s CSS beyond its tolerance levels to enable them to produce G5 material, which has proved detrimental to the life of the machine,” he says.

In addition, because of the post screen, contractors can now feed a vertical shaft impact (VSI) crusher directly from a jaw. Previously, this was not achievable as the topsize from a jaw is too big to report directly to a VSI before further reduction. The post screen allows operators to control the size of the product that goes into the VSI. This reduces the number of machines required in the train, translating into lower wear and running costs.

Powered by a Volvo diesel engine producing 162 kW of power, the machine is tipped to be a hit with customers in the local market due to its lower fuel consumption. The patent ECO setting brings fuel burn to below 10 litres per hour, depending on application.

Less than 2,5 m wide, the crusher can be transported easily from site to site. Because it weighs less than 30 t, no special permits are required to transport it between jobsites. This is particularly beneficial for contractors who have to move from one job to the other.


Publication: Quarrying Africa