Blow Bars: Which Metallurgy Is Right for You?

Aug 4, 2015

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Blow bars are a critical part when it comes to crushing with Horizontal Shaft Impactors (HSI). Whether you call them breaker bars, blow bars, hammers or impact hammers, they are all the same.  They impart the energy into the material and accelerate it into the curtain or apron, causing the shattering and crushing of the material.

Unless you’re crushing Styrofoam, what metal you use matters. Some are better for highly abrasive materials while other are better suited for materials filled with rebar. Choosing the wrong bar for your application can mean decreased production, frequent bar replacements and increased parts cost from frequent replacements. All this would mean less material produced and less profit for you.

The 4 major types of blow bars are high chrome, medium chrome, low chrome and hybrid alloy.

High Chrome – This bar metallurgy is what you would likely want to select if you plan or crushing asphalt or another highly abrasive feed material. However you do need to ensure feed size is kept down as well as insuring large and medium-sized rebar is kept out of the feed. Introducing too much steel or steel that is too large can cause the bar the fracture.

Medium Chrome – This is a bar that you would probably want to select if you plan on crushing a variety of feed materials over the course of the bar’s life. This type of bar handles relatively large feed sized when compared to the impactor’s feed opening. It can also handle most steel contaminants without issue. This bar can do some work in asphalt but is not a good choice for large Reclaimed Asphalt Pavement (RAP) jobs.

Low Chrome – This is the bar you would likely select if you expect to do primarily concrete, demolition and aggregate jobs. This bar stands up to very large feed materials as well as feed that is heavily contaminated with steel and rebar. This bar will not handle highly abrasive materials well, however.

Hybrid Alloy – This unique alloy is similar to a high chrome bar and would be a good fit for operators who are crushing materials that are abrasive, such as asphalt, but may need the ability to handle larger feed sizes. This bar can also work for operators who may need to crush concrete or light aggregates on occasion. Steel and rebar should be removed, especially if large, or limited when feeding using hybrid alloy bars.

These bars fit the needs of nearly all operators, but special jobs may require special metallurgy bars. Eagle Crusher’s parts and engineering departments can work with you to determine the best bar for you application.

Contact Eagle Crusher today to discuss what blow bar is the best fit for your operation.

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Previous Posts

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...

Which Screening Setup Can Optimize Your Crushing Operation?

Portable plants and other crushing equipment can come in many shapes and sizes depending on the needs of a producer. Just as integral to a crushing operation as an impactor or jaw crusher are the screens being utilized to sort product. With so many options and...

Eagle Crusher Company Updates – April 2021

Eagle Crusher Names New Del. and MD. Crushing and Screening Plant Distributor Eagle Crusher Co., Inc. is proud to announce GT Mid Atlantic as the new Eagle Crusher distributor for the states of Delaware and Maryland. The company will represent Eagle Crusher’s full...

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In order to protect team members who are performing maintenance on crushing equipment like portable plants, energy must be completely removed and disconnected from relevant components to make maintenance safe through a process known as an isolation procedure or more...

Optimize Your Crushing with Eagle Crusher’s Configurable Designs

Working in the crushing industry can lead to some unique challenges on the job site. How to best lay out equipment to optimize production? What type of crushers are needed to reduce the material efficiently? Will one crusher be enough for the job? Eagle Crusher is...

Properly Feeding Material for Crushing

On a crushing site, there are many moving pieces and parts that work together to ensure that production is optimized and remains issue-free, like the loaders, the crushers, screening plants, conveyors, etc. Loaders transporting material to the crusher have the...

Reselling Portable Plants & Buying Preowned Crushing Equipment

Portable crushing plants like those that Eagle Crusher manufactures are engineered to be high quality and heavy-duty products in order to withstand the extreme amounts of wear and tear associated with crushing and screening materials like aggregate, concrete, and...

Eagle Crusher Company Updates – March 2021

Eagle Crusher Exhibits at C&D World 2021 The Eagle Crusher sales team exhibited our comprehensive line of crushing equipment and services at the C&D World 2021 Conference & Exhibition, hosted at the AT&T Hotel and Conference Center on March 21...

Wearing PPE and Crushing Safely

Heavy material like aggregate and concrete blocks can move around a crushing site quickly, from the loader, into an impactor, and out across conveyor belts. All of this moving material, paired with the site’s heavy machinery, can present job hazards. Crushing teams...

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