Premium Crusher Blow Bars For Popular Brands

Qiming Casting is one of the leading suppliers of durable wear solutions, supplying over 30 years of high-grade, high-quality chrome steel and Metal Matrix Composite blow bars for all kinds of popular brands. Our diverse teams have engineered the finest blow bars, innovatively designed to withhold high impact and abrasion. 


Crusher Blow Bars

Crusher Blow Bars

What are Crusher Blow Bars?

Crusher blow bars, or ‘impact blow bars,’ are crucial wear items for impact crushers. A blow bar diverts the material towards the crushing chamber. The material fractures into smaller segments as soon as it comes in contact with the impact wall. They ensure the machine is appropriately undergoing the crushing process. Crusher blow bars must be replaced in time to avoid damage to other integral parts of the machinery. 

Working Principles

A crusher blow bar is used in horizontal shaft crushers and is mounted on top of the rotor, stacked in groups of 3 or 4 pieces. Once the machine starts, the material comes in contact with the bar and is immediately crushed. A crusher blow bar is made up of high-resistance steel with various other materials that can be customized in accordance with machinery specifics and the client’s needs.  A crusher must first be made in light of what will accurately match your machinery’s profile, which is what we do here at Qiming Casting.


Durable Crusher Blow Bars by Qiming Casting 

Qiming Casting is one of the leading front players in the mining industry, distributing quality mining goods for over 30 years. We offer specific customized shapes and metallurgical material specifications to match diverse operating processes and crushers. Our consistent quality has made us one of the biggest suppliers of high chrome blow bars in the Middle East and Spain. 

We offer a range of engineered crusher blow bars tailored to the details of your machinery profile. Our team conducts a thorough specification test on your machine to create customized blow bars.

It’s important to note the material used in your crusher blowbars. The composition of materials determines whether the blow bar would be an adequate fit against the abrasive material.  

Every delivered blow bar is made of high-strength, wear-resistant material. Some of our most independent materials currently on the market are; 

  • Manganese steel 
  • Chrome steel 
  • Martensitic steel 
  • Chrome + Ceramic 
  • Martensitic + Ceramic    

If you need any types of crusher blow bars, please send us your inquiry part number or drawings. On the other hand, we can offer the OEM/ODM services of our products. The product can be customized according to your personalized requirements or based on your crusher working conditions. Please offer your design documents or tell us your ideas and our R&D team will do the rest.

Selecting Blow Bars

You can now select from various Qiming Casting wear parts supplied to some of the biggest company chains around the globe. Our highest-quality blow bars offer double resistance, impact, and performance longevity.

Chrome Steel Blow Bars

Chrome steel bars are more popular amongst our clients, especially in the Middle East. Chrome is used in manufacturing products that can withstand highly abrasive crushing processes. Because Of their splintery texture, they are best at fracturing more enormous rocks. They can also aid in shredding other coarse materials smaller in feed size. We offer all kinds of graded chrome bars to match your product needs.  

High Chrome Bars 

 High chrome bars are best suited for crushing natural rocks or asphalt. This is mainly due to their resistance against stubborn, difficult-to-break rocks. Compared to martensitic ceramic hammers, their title consistency makes them an excellent choice in handling uncrushable contaminants such as drilling bit, tramp, iron, rebar, and milling teeth. 

We recommend our customers invest in chrome steel bars if they have smaller feeds.  

Middle Chrome Bars 

Middle chrome bars accommodate larger feeds, offering a range of potential crushing materials. They are an excellent choice to crush less abrasive material in larger quantities. It could also fulfill asphalt crushing. Often, customers mistake low chrome bars for recycling purposes, which is what high chrome bars are best used for.  

Low Chrome Bars

Our low chrome bars are best known for crushing concrete and more extensive materials. They offer excellent fatigue resistance to a mixture of rebar and steel. However, there might be better choices than low chrome bars for highly coarse materials.


Learn more about Chrome steel casting→

Chrome Steel Blow Bars

Metal Matrix Composite blow bars

Metal Matrix Composite (MMC) blow bars are components used in the construction and mining industries, particularly in crushing equipment such as impact crushers. These blow bars are a type of wear-resistant material designed to enhance the performance and durability of the crushing machines.

Traditional blow bars are typically made of high-chrome white iron, which is known for its hardness and abrasion resistance. However, Metal Matrix Composite blow bars take the design a step further by incorporating a matrix of different materials. The matrix often consists of a metal alloy combined with ceramic particles or other reinforcing materials.


Learn More about Metal Matrix Wear Parts →

Martensitic Ceramic Blow Bars

Martensitic ceramic blow bars are white iron, ceramic, and martensitic steel. Maternistis is carbon-dense iron and has high resistance properties. When combined with high-graded ceramics, martensitic ceramic reduces the risk of damage, increasing blow bars’ longevity by 60%. 

Martensitic ceramic blowbars are best for recycling purposes. They are also popular amongst our clients for primary and secondary crushing. 


Learn more about Martensitic Ceramic Blow Bars

Martensitic Ceramic Blow Bars

Chrome Ceramic Blow Bars

When combined with ceramic, Chrome makes a much more durable crusher blow bar mainly because it outfits ceramic inlays. However, they are best used in supporting lower, smaller feed sizes. 

Chrome Iron with Ceramic is a premium composite metallic matrix iron with rigid ceramic alloy inserts on the wear surface. The rugged alloy ceramics combined with medium or high chrome iron matrix provides a significant working life advantage over standard chrome iron bars. Due to its unique composition and versatile benefits, we often recommend that our clients invest in chrome ceramic blowbars to crush the most abrasive material.


Learn more about Chrome Ceramic Blow Bars

Chrome Ceramic Blow Bars

Frequently Asked Questions

Which are the influencing factors on blow bars wear?

In the current economic climate, decreasing cost and increase profit are the most important, and cost base is a major factor in managing a successful quarrying business, crusher replacement costs associated with cone crushers can be a major cost center. This post explains a method to reduce crusher replacement costs by casting crusher liners. However, the process has been perfected in recent years and can work well in the right applications. Cone crushers operate by having stone fed into the top of the crusher chamber. The chamber is lined with crusher replacement, namely the mantle and bowl liners. As the stone drops through the choked chamber, crushing is achieved when the motion of the mantle causes compressive and abrasive forces to act upon the stone and bowl liner, causing the stone to break. Liners are manufactured from manganese steel rather than normal steel as the manganese content provides protection against abrasion (normal steel generally has a lower tolerance to wear than crushing duties require). Depending on the stone being crushed, the percentage of manganese in the liners can vary from around 12% to 23%, so we can find the materials Mn14, Mn18, and Mn21. Below are the major factors we need analytics:

Liner selection

When selecting a crusher the bowl liner also varies in type:

  • Coarse: wide inlet aperture
  • Medium: medium inlet aperture
  • Fine: small inlet aperture

Once again, selection depends upon the product required and the feedstock. Consultation with manufacturers is essential, some of whom will provide computer design facilities and offer wear-analysis services on both their own and other makes of crusher, such as the level of competition.

Crusher selection

Correct crushing chamber selection is crucial when installing a cone crusher. The reduction ratio, which in turn determines the product produced, depends on the chamber selected. In addition, the closed-side setting (the gap where maximum crushing is attained) affects both wear and the product produced. For example, if a standard unit is used instead of a short head, a reduction in fine product occurs, resulting in recirculation and, hence, more wear. The characteristics of the main types of the chamber are Standard: shallower angle than a shorthead with a longer crushing face. Suitable for larger feed sizes, generally +100mm, with a wide feed grading curve. Suitable for use as a secondary crusher but, if the smaller feed is introduced, can become susceptible to packing/blockages. Shorthead: steeper angle than a standard with a shorter crushing face. Suitable for smaller feed sizes, generally –100mm, with a short feed grading curve. Suitable for use as a tertiary crusher but will not accept large feed size owing to its smaller feed aperture.

Add protective surface

During material crushing in an impact crusher, wear is produced when the elements press against each other, such as liner, blow bars, and crushing material. During this process, small materials from each element become detached, causing the surface to wear away. The primary factor in wear for crushing applications is abrasion. Material fatigue is also a factor as the wear material is subjected to numerous pressure and impact stresses. There are several factors that influence the wear behavior of an impact crusher. The following are some of the factors that affect the wear lifetime of crusher blow bars:

Material-related factors:

  • Abrasiveness
  • Breakability
  • Grain shape
  • Fine-particle proportion
  • Moisture content
  • The proportion of unbreakable elements

Machine-process-related factors:

  • Crushing ratio
  • The ratio of the upper to the lower impact toggle
  • Rotor speed
  • Type of loading
  • Screening mesh of the prescreen
  • Contamination in the crushing chamber

Operation-related factors:

  • Continuity of feed
  • Correct adjustment of machine parameters
  • Replacement of wear parts in due time
  • Selection of the right blow bars


When to change crusher blow bars?

3 situations need to change crusher blow bars:

  1. Normal wear. In order to avoid damage to the rotor, blow bars should be replaced before they are worn through.
  2. Blow bar break. When a chrome blow bar crushes iron steel, it easily breaks; Some “problem” blow bars (Casting shrinkage cavity) also easily break; Other reasons results.
  3. When one face is used, the blow bar can be turned around to use the other face.

How to change crusher blow bars?

There are 6 steps to changing crusher blow bars:

  1. Open the impact crusher as per the instruction manual;
  2. Switch off the system components and diesel generator;
  3. Secure the rotor;
  4. Visually inspect the wear limit on all blow bars;
  5. Visually check the blow bars for cracks and protrusions;
  6. Turn around or replace the blow bars as necessary

Notes on change crusher blow bars:

  • For rough cleaning of the crushing chamber, it is recommended to fill the crusher for several minutes with clean, coarse material;
  • Always use suitable lifting gear and tack;
  • At least two people should take part in installing and removing crusher blow bars;
  • Improper replacement of the blow bars can lead to crusher damage;
  • Completely extend the crusher gap before blow bar replacement in order to prevent a collision between the blow bars and toggle after new blow bars have been installed;
  • Only operate the rotor if the blow bars have been correctly installed;
  • Always replace blow bars in sequence;
  • Before making the final setting, briefly operate the machine at the highest rotational speed, then check the wedge clamps; tighten the screws if necessary;
  • Replace all blow bars even if only one of them is broken;
  • A non-secured rotor can lead to severe injuries, observe safety instructions;
  • Always use conical spring washers with the clamping bolts of the tensioning devices. Retighten the clamping bolts after approx. two operating hours.

Some crusher blow bars working problems and solutions

There are many reasons why your impact crusher blow bars are breaking on a regular basis. We have compiled a list of the most common causes of blow bar failure and the solutions to those problems.


Study case 1

Problem: Excessive penetration on the blow bar


  • The rotor speed is too slow.
  • Increases risk of blow bar breakage.
  • The blow bar is under-utilized before changing.
  • Increased rotor wear.


  • Increase the rotor speed.
  • Change to 4 high blow bars.


Study case 2

Problem: Poor penetration on the blow bar means the top of the blow bars is worn down flat.


  • The rotor speed is too high.
    • Wear rates will be excessive.
    • Reduced output.
    • Creates a lot of fines


  • Reduce the rotor speed.
  •  Change configuration to 2 high and 2 low blow bars.


Study case 3

Problem: Wear on the sides of the blow bar


  • A high percentage of fines in the feed or overfeed causing fines to be pushed outside.
  • Crusher chamber contaminated with caked material causing friction wear.


  • Reduce the speed of the feeder so wear becomes even across the surface of the blow bar.
  • Clean chamber daily after each shift.


Study case 4

Problem: Blow bar wearing excessively to one side


  • The machine on uneven ground – material falling to one side
  • The machine isn’t choke-fed.
  • Feed dropped onto one side of the feeder when using a recirculating option.


  • Ensure the machine is on level ground.
  • Continuous loading.


Study case 5

Problem: Blow bar is damaged or broken.


  • Incorrect blow bar for an application. (E.g. Chrome)
  • There is steel or rebar in the feed.
  • The feed size is too large.


  • Select the correct blow bar.
  • Control feed size.
  • Remove steel or rebar.

What is the best material for my crusher blow bars?

What material is best for your impact crusher blow bars? What material has the longest service life of a blow bar? These depend on the working conditions of your machine. There are two main aspects of the working conditions: the wear resistance and crushing difficulty of the material being crushed; and the type of material being crushed.

There are four kinds of material that we use in manufacturing crusher blow bars. Different materials suit different impact crusher working conditions.

  1. High Manganese. This material is widely used in crusher jaws, crusher cones, and crusher shells, not common in impact crushers. However, when crushing less abrasive and large feed material(such as limestone), the manganese blow bars are the best choice.
  2. Martensitic Steel. Martensitic steel lies between manganese and chrome steel. It’s used if the impact load is too little to harden the manganese steel, and good wear resistance is required along with good impact stress resistance.
  3. Chrome Steel. Chrome steel is the common material in casting HSI blow bars because it has a very good hardness. Regularly, chrome steel typically has a hardness of 60 to 65 HRC. And if we increase the elements’ “Mo” content, it also can get very toughness and wearable, not easy break.
  4. Metal Matrix Composites. This combination makes HSI blow bars very wear-resistant but at the same time very impact-resistant. With blow bars made of composites from the surface of ceramics, the working life can reach three to five times that of simple martensitic steel blow bars.


What material do you crush?

Every material has unique characteristics in terms of hardness, abrasion, and breaking characteristics. The harder the material, the more you need to watch your feed size.



What material of crusher blow bar is the best choice for crushing concrete?

Qiming Casting’s advice: Martensitic blow bars with ceramic inlays.

What material of crusher blow bar is the best choice for crushing asphalt?

Qiming Casting’s advice: Chrome steel or chrome steel blow bars with ceramic inlays.

What material of crusher blow bar is the best choice for crushing limestone?

Qiming Casting’s advice: In primary crushing, we suggest martensitic blow bars with
ceramic inlays; In secondary crushing, we suggest chrome steel or chrome steel blow bars with ceramic inlays.

What material of crusher blow bar is the best choice for crushing basalt?

Qiming Casting’s advice: In primary crushing, we suggest martensitic blow bars with
ceramic inlays; In secondary crushing, we suggest chrome steel or chrome steel blow bars with ceramic inlays.

What material of crusher blow bar is the best choice for crushing granite?

Qiming Casting’s advice: In primary crushing, we suggest martensitic blow bars with
ceramic inlays; In secondary crushing, we suggest chrome steel or chrome steel blow bars with ceramic inlays.

What material of crusher blow bar is the best choice for crushing sand & gravel?

Qiming Casting’s advice: In primary crushing, we suggest martensitic blow bars with
ceramic inlays; In secondary crushing, we suggest chrome steel or chrome steel blow bars with ceramic inlays.


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