Roljack Vertical Shaft Impactor (VSI)

ROLJACK VSI crushers use a different approach involving a high-speed rotor with wear-resistant tips and a crushing chamber designed to ‘throw’ the rock against the rock. The VSI crushers utilize velocity rather than surface force as the predominant force to break rock. In its natural state, rock has a jagged and uneven surface. Applying surface force (pressure) results in unpredictable and typically cubical resulting particles. Utilizing velocity rather than surface force allows the breaking for to be applied evenly both across the surface of the rock as well as through the mass of the rock. Rock, regardless of size, has natural fissures (faults) throughout its structure. As rock is ‘thrown’ by a VSI Rotor against a solid anvil, it fractures and breaks along these fissures. Final particle size can be controlled by

The velocity at which the rock is thrown against the anvil and The distance between the end of the rotor and the impact point on the anvil. The product resulting from VSI Crushing is generally of a consistent cubical shape such as that required by modern SUPERPAVE highway asphalt applications. Using this method also allows materials with much higher abrasiveness to be crushed than is capable with an HSI and most other crushing methods.

VSI crushers generally utilize a high-speed spinning rotor at the center of the crushing chamber and an outer impact surface of either abrasive resistant metal anvils or crushed rock. Utilizing cast metal surfaces ‘anvils’ is traditionally referred to as a “Shoe and Anvil VSI”. Utilizing crushed rock on the outer walls of the crusher for new rock to be crushed against is traditionally referred to as “rock on rock VSI”. VSI crushers can be used in static plant set-up or in mobile tracked equipment.

Roljack RVSI range of Impact Crushers is designed to make fine Manufactured Sand (M-Sand) as well as Plaster Sand. Our ROCK ON ROCK (ROR) crushing mechanism provides high output efficiency and less percentage of metal particles in the product. Roljack Asia Ltd. manufactures VSI machines for 30-800 Ton/hour capacity.

Model Name Production In Tons / Hous Feed Range (MM) Output Range Motor H.P.
RVSI 900/M 40 – 75 Tons 4 – 25 MM 1 – 20 MM 40 – 75 HP
RVSI 900/M 75 – 125 Tons 4 – 35 MM 1 – 25 MM 75 – 125 HP
RVSI 1500/M 100 – 150 Tons 4 – 40 MM 1 – 25 MM 100 – 150 HP
RVSI 1800/M 150 – 300 Tons 4 – 90 MM 1 – 25 MM 150 – 300 HP
RVSI 2000/M 300 -500 Tons 4 – 125 MM 1 – 40 MM 300 -500 HP

Roljack Vertical Shaft Impactor (VSI)
Benefits of VSI
Features of VSI

Very cubicle product

Best for Sand Production

70% Compared Low Production Cost

Benificiation of material

Gradation consistency

High product yield

High fracture percentage

Simple maintenance

High throughput capacity

Low capital investment

A Direct Tertiary Stage Machine Used for all types of Material.

Best quality of sand manufactured as compared to natural sand

Available in ROR, ROS.SOS

Large spherical roller bearing

Patented Hydra Lid Lifter

Externally Adjustable Feed tube system

Lid & Main frame liners are 60% cast chrome protected

Tungsten carbide components in rotor

Modular oil system of 40 gallon (150 ltrs) reservoir, And smart

oil flow System

USA renowned technology

Production capacity upto 800 TIH

Only machine, Feed Size upto 90 mm

Rotor available in 4 port, 3 port as per application