What Is an Impact Crusher and What Can It Do for You?

Dec 6, 2019

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An impact crusher, or impactor, is one of several types of crushing machines, including jaw crushers, hammermills, and cone crushers, that is manufactured for the purpose of processing raw materials, like concrete or asphalt, among many others, to reduce them in size.

Used in a wide variety of applications, including aggregate crushing, asphalt crushing, and concrete crushing, etc., an impactor is unique to its crusher counterparts in that it breaks apart rocks and stones by rapidly striking the material as opposed to utilizing a pressure force.

The mechanical structure of an impact crusher is defined by its rotor, the primary instrument for breaking apart material. The rotor is set among mounted plates, anvils, or aprons, inside a heavy housing; these aprons or anvils serve to bear the impact of the materials being processed and further break them apart.

What Is an Impact Crusher and What Can It Do for You?

There are two styles of impact crushers: horizontal shaft impactors (HSI) and vertical shaft impactors (VSI). The distinguishing feature between these two styles is the physical orientation of the rotor within the impactor.

The rotor of a horizontal shaft impactor is oriented horizontally and utilizes blow bars or hammers to strike flowing material with great force in order to break it. Horizontal shaft impactors are useful as both primary or secondary crushers and are able to crush a wide range of materials, from soft rock to much harder materials.

When a horizontal shaft impactor operates, the rotor spins around its shaft at a high velocity. As material flows into the chamber, the rotor’s blow bars repeatedly strike the materials, breaking them apart and sending them into the hanging aprons, resulting in additional reduction.

A vertical shaft impactor’s rotor is oriented vertically, and instead of relying on striking material with great force, it relies on launching material at high speeds to be impacted upon anvils or even other rocks configured around the perimeter of the rotor. Vertical shaft impactors are limited in the feed size they can process and are used as secondary or tertiary crushers only.

When a vertical shaft impactor operates, material is fed into the chamber from above the spinning rotor. The material enters the rotors rapidly moving wings and is hurled outward to be broken upon the peripheral anvils or rocks.

The final size of material being processed by an impact crusher is partially determined by the rotational speed of its rotor. As the rotor operates at higher velocities, material is reduced to a finer and finer specification. Additionally, how closely the aprons are in relation to the rotor can further determine material size; the closer the aprons, the finer the output.

The impact crusher is popular because it can be used for a variety of material processing applications in a variety of configurations, making it a versatile crusher to own. From soft rock to hard rock—as a primary crusher or secondary crusher—the impact crusher can be custom calibrated to ensure your success.

Eagle Crusher UltraMax® Impactors are the most durable and reliable horizontal shaft impactors on the market today. Originally designed to process the toughest high-volume steel rebar with ease, UltraMax® Impactors outperform the competition across multiple applications—aggregate, asphalt, concrete recycling, and more.

Performing the job of a primary and secondary crusher in one unit, UltraMax® Impactors are built for high volume production and ultra-high reduction rations to produce high quality cubical product with minimal fines.

For complete UltraMax® Impactor product specifications, please visit its product page.

Serious Projects Demand Eagle Crusher.

Eagle Crusher consistently leads the industry in new product innovations. We stand by our products with unsurpassed service and support to make your job easier.

Get serious. Get Eagle Crusher.

• Durability and longevity
• 24-hour parts and service
• American made
• Highest productivity and profits
• High resale value
• Celebrating 100+ years of service

Previous Posts

Magnets and Crushing: Inline or Cross Belt

Concrete recycling is on the rise, as construction and demolition waste is increasingly being diverted from landfills and being crushed and reused for new projects. Consequently, having the ability to efficiently sort through concrete rubble for rebar and other metal...

The Importance of Conveyor Safety

Regarded as the lifelines of any crushing operation, conveyor systems are some of the most valuable machines on the job site as they are designed to quickly transport bulk product from one point to another in order to greatly reduce the time spent manually handling...

Getting The Best From Your Impact Crusher

The crushing market caters to a wide range of material processing industries, like aggregate, asphalt, and concrete and demolition recycling, that handle an even wider range of materials, including limestone, concrete, and gravel, among many others. Yet, all crusher...

Crushing Safely in the Summer Season

As the summer months arrive in North America, operating portable crushing and screening plants on a job site outdoors can become more demanding as exposure to high temperatures introduce new safety hazards to team members. Dangers that are inherent to hot weather like...

Managing Horizontal Shaft Impactor (HSI) Curtain Wear

On a crushing job, every machine and piece of crushing equipment works together to contribute to the success of production. However, it is necessary to recognize that certain components of equipment like portable plants should require extra care to achieve that...

Optimizing Stockpiling on the Crushing Site

Striking the right balance between producing a quality aggregate product and maximizing operational efficiency is a familiar challenge on any crushing site. To achieve harmony, the right equipment needs to be set up and configured to account for any variables that...

Eagle Crusher Company Updates – May 2021

Eagle Crusher Launches New Company Website Eagle Crusher is pleased to announce the launch of our new company website that is designed to better help users find the right crushing and screening products for their operations. An industry leader for more than 100 years,...

Preventing Pinch Points and Finger Hazards While Crushing

Portable crushing and screening plants are engineered with the safety of its operators and others in mind. Just as well, potential safety hazards like pinch points and finger injuries can be prevented on the job site by properly training team members and following...

Screening Plants and Systems for Serious Crushing Projects

The most effective crushing operations are often complemented by an appropriate configuration of screening plants and systems that can best sort and stockpile the material being processed as efficiently possible. Eagle Crusher manufactures a comprehensive range of...

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