What is Hard rock roll crusher

Hard rock crusher ,also named as double roller crusher or roller sand making machine, runs by driving two motors and two pairs of rollers to grind the material fed. Double roller crusher can operate crushing material less than 80mm as well as the finished product size 50 mesh-20mm.

Hard rock is the rock with very high hardness, such as granite, quartz sandstone, basalt and other magmatic rocks, iron and calcium cemented conglomerate, sandstone, limestone, muddy greywacke, dolomite and other sedimentary rocks. Crushed hard rock is used in the construction of roads, tunnels, municipal buildings, airport runways, railways and so on.

Reasons for choosing us

1. Compared with hammer sand making machine, roller crusher does not need to replace wearing parts.

2. The finished product features pretty shape, well gradation, low over-crushing rate and high output.

3. Roller crusher is superior to hammer crusher and impact crusher, and the average service life ofitsroller sleeve is more than 2 years.

4. Roller skin contains high content of chromium, manganese and other rare metal materials. Adjustable discharge size.

Machine-testing Video

It is suitable for crushing sticky stone material into medium size. Roller crusher utilizes two rollers rotating in opposite direction to crush the material, which consists of motor, bracket, fixed rollers, movable rollers and springs.

Hard rock crusher is to use two sets of individually driven rollers to crush materials by squeezing and grinding shear force generated by relative rotation. The material falls into between the two rollers through the feeding port, and the finished products fall naturally after crushed by the roller extrusion. When encountering too hard or unbreakable materials, the rollers can automatically back off by the action of hydraulic cylinder or spring, so that the gap between the two rollers increases, and the hard or unbreakable materials fall naturally to ensure that the machine is not damaged, and the two rollers rotating in the opposite direction can be adjusted by the pressure of the hydraulic cylinder or spring to control the product’s The two rolls rotating in opposite direction can adjust the pressure of hydraulic cylinder or spring to control the granularity of the product.

Hard rock roller crusher working principle

The river pebble roller crusher operates through rollers. The Hard rock, put into the machine through the inlet, are crushed by the squeezing between the rollers. The discharge size can be controlled by adjusting the gap between the two rollers. If the gap becomes larger, the discharged size becomes larger. While the gap becomes smaller by compressing spring, the discharge size also becomes smaller.

Product category

Hard rock roller crusher is divided into several kinds: Spring fine crushing sand making machine, cardan shaft drive roller crusher, hydraulic fine crushing sand making machine.You can choose the machine according to your budget and the facts.

Product Model

There are small, medium and large  roller crusher.

1. Small stone roller crusher: 250×250，400×250，400×400，610×400  Production capacity: 2-12 tph

2. Medium roller crusher: 750×500，800×600，800×800，1000×800  Production capacity: 20-50 tph

3. Large roller crusher: 1200×800，1200×1000，1500×800，1500×1000，1500×1200，1800×1200，2000×1000 or larger  Production capacity: 50-400 tph

HSM machines features different configurations. The sales manager can recommend the proper product to the customers according to their facts.