Impact Crusher

An impact crusher is a crushing machine that uses high-speed impact force to break medium-hard and relatively low-abrasive materials into smaller, more uniform particles. Instead of relying mainly on compression, it uses a rotating rotor and blow bars to strike the feed material, then throws it against impact plates for repeated crushing. This working method makes it suitable for secondary crushing, aggregate shaping and recycling applications where good particle shape and adjustable discharge size are important.

The PF series impact crusher is commonly used for limestone, dolomite, concrete waste, asphalt, coal gangue and other medium-hard materials in quarry, mining, road construction, cement material processing and recycling projects. Its main structure includes the rotor, blow bars, impact plates, side liners, frame, bearings and drive system. Model selection should be based on feed size, required capacity, discharge size, material abrasiveness, installation type and the complete crushing line layout.

The specification table should be used as a model selection reference. Actual output may change with material hardness, moisture, feed gradation, rotor speed, blow bar wear, discharge setting and feeding continuity. For stable production, the feed opening, maximum feeding side length and required discharge size should be reviewed together.

PF_Series_Impact_Crusher_Specification_Sheet-.pdf

The impact crusher working process is based on rotor impact and repeated material collision. Material enters the crushing chamber through the feed opening. The rotor drives the blow bars at high speed, and the blow bars strike the material directly. The material is then thrown toward the impact plate, broken again, and returned into the impact area until it reaches the required discharge size.

The following 2D working principle animation shows how large feed material enters the impact crusher, is struck by the blow bars, rebounds against the impact plates, and exits through the discharge opening after repeated crushing.

This working principle makes the machine suitable for aggregate shaping and recycling crushing. However, because the crushing force comes from high-speed impact, wear-part selection and chamber adjustment are very important.

Reliable impact crusher parts help maintain stable output, reduce downtime and control long-term operating cost. When comparing machines, customers should not only look at the main frame and motor, but also check the rotor structure, blow bar material, liner protection and adjustment system.

The impact crusher blow bar is the main wear part mounted on the rotor. It directly contacts the feed material, so its material choice affects crushing efficiency, wear life and maintenance cost.

For limestone crushing, high chrome blow bars are often selected because they provide good wear resistance. For concrete recycling, demolition waste or mixed feed, tramp iron risk should be checked before choosing the blow bar material. A wrong blow bar selection may cause early wear, breakage or unstable production.

A stationary impact crusher is suitable for long-term quarry, aggregate and cement material crushing lines. It is usually installed with a separate feeder, conveyor and vibrating screen.

A mobile impact crusher is more suitable for temporary sites, recycling projects and road construction where equipment needs to move between working locations. It usually integrates feeding, crushing, conveying and control systems on one mobile chassis.

Impact crusher selection should start from real working conditions instead of only comparing model names. A model with higher capacity is not always the best choice if the feed size, discharge requirement or wear condition does not match.

When asking for an impact crusher for sale quotation, it is better to provide clear technical information. A simple price request may lead to an inaccurate model recommendation.

• A more useful inquiry would be:
• Material: limestone
• Max feed size: ≤300 mm
• Required capacity: 150 t/h
• Discharge size: 20–60 mm
• Installation type: stationary plant
• Spare parts: blow bars and liners required
• This type of RFQ allows the supplier to recommend the model, motor power, wear-part material, auxiliary equipment and shipment scope more accurately.

Impact crusher maintenance should focus on wear parts, rotor condition, fastening system, bearing temperature, drive system and discharge gap. Because the rotor works at high speed, abnormal vibration or loose fasteners should be checked immediately.

Before ordering a PF impact crusher, confirm the following information:

• Material type and hardness
• Maximum feeding side length
• Required capacity in t/h
• Required discharge size
• Stationary or mobile installation
• Power supply requirement
• Blow bar and liner material requirement
• Feeding equipment and discharge conveyor requirement
• Destination country, port and packing method
• Required documents, inspection records and loading photos

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FAQ

 

 

01.What is an impact crusher used for?

It is used for crushing limestone, concrete waste, asphalt, dolomite, coal gangue and medium-hard aggregate materials. It is commonly applied in secondary crushing, recycling and aggregate shaping.

02.How does an impact crusher work?

Material enters the chamber and is struck by blow bars mounted on a high-speed rotor. The material then hits the impact plate and is crushed repeatedly until it reaches the required discharge size.

03.What is an impact crusher blow bar?

A blow bar is the main rotor wear part. It directly strikes the feed material and has a strong influence on crushing efficiency, wear cost and product quality.

04.What are the main impact crusher parts?

Main parts include rotor, blow bars, impact plates, side liners, main shaft, bearings, frame, drive system and adjustment device.

05.When should I choose a mobile impact crusher?

It is suitable for temporary crushing sites, construction waste recycling, road projects and applications where the equipment needs to move between different locations.

06.Which PF impact crusher model should I choose?

The model should be selected according to maximum feed size, capacity, discharge size, material hardness, abrasiveness and plant layout. For example, PF-1214 covers ≤300 mm feed size and 130–180 t/h capacity, while PF-1515 covers ≤400 mm feed size and 300–350 t/h capacity.

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