Difference between Horizontal Shaft Impactors and Vertical Shaft Impactors – Promaninfi

An impact crusher is a machine that uses striking as opposed to pressure to reduce the size of a material. Impact crushers are generally secondary or tertiary crusher depending on which processing stage the equipment is being utilized. Vertical shaft impactors (VSI) and horizontal shaft impactors (HSI) are both types of impact crushers used for crushing materials. The main difference between the two types is the direction of the impact forces they produce.

Horizontal Shaft Impactors (HSI) have a horizontal shaft that rotates at high speed and delivers a powerful impact force to the material being crushed. This impact force is generated by the rotation of the rotor, which is equipped with a series of blow bars or hammers that strike the material as it passes through the crushing chamber.

In contrast, Vertical Shaft Impactors (VSI) has a vertical shaft that rotates at high speed and uses centrifugal force to throw the material against a fixed surface, such as a rock-lined wall or a chamber full of anvils. This impact force is generated by the high-speed rotation of the rotor and the centrifugal force that it produces. Some of the benefits if VSIs as compared to HSIs are:

• Greater production capacity
• Lower wear and tear
• Easier operation
• Lower power consumption
• More consistency in product output
• Produces lesser ultra-fines.

HSI’s are typically used for softer materials, such as coal and limestone, while VSI’s can be used for wide range of material. Additionally, VSI’s produce a more cubical product shape compared to HSI’s, which tend to produce more elongated and flaky particles.

To understand which crusher is the best for you, here are a few things to keep in mind:

Type of material: First and foremost, find out the type of material you will be crushing. HSI crushers are suitable for softer materials like coal and limestone whereas VSI crushers can be used for wide range of material.

Ease of maintenance and lower operations cost : VSI’s crushers have lower power consumption, lower wear and tear and are much easy for maintenance when compared to HSI crushers.

Quality of the required product: VSI crushers are known to produce better quality of the required products. Generally, HSI crushers tend to produces more ultra-fines and more elongated and flaky particleswhich ultimately impacts the quality of the end product. In summary, the main difference between VSI and HSI impactors is the direction of the impact forces they produce. HSIs use a horizontal shaft to deliver a powerful impact force to the material being crushed, while VSIs use a vertical shaft and centrifugal force to throw the material against a fixed surface. They both have different applications and outputs.

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