Editorial Technical Reference

Impact Crusher

This page explains how Impact Crusher is classified within Non-Metallic Mineral Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A crushing machine that uses impact force to reduce the size of materials by striking them with hammers or blow bars mounted on a rotating rotor.

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Impact Crusher

Definition
An impact crusher is a heavy-duty industrial machine designed to break down large rocks, concrete, and other hard materials into smaller, more manageable pieces. It operates by accelerating feed material into a rapidly rotating rotor equipped with hammers or blow bars, which then strike the material against stationary anvils or breaker plates. This high-velocity impact causes the material to fracture along natural fault lines, producing cubical-shaped aggregates with minimal flakiness. Impact crushers are widely used in quarrying, mining, recycling, and construction industries for primary, secondary, and tertiary crushing applications.

Typical specifications for impact crushers include rotor diameters ranging from 800 to 1600 mm, rotor widths from 600 to 2000 mm, and maximum feed sizes from 300 to 800 mm. Capacities can range from 50 to 500 tons per hour, with motor powers between 75 and 630 kW. Rotor speeds typically vary from 400 to 1200 rpm. The total weight of the crusher assembly is usually between 5 and 40 tons. Discharge openings are adjustable within a range of 20 to 100 mm to control product size. Operating temperatures should be maintained between -20°C and 40°C to ensure proper lubrication and seal function. Vibration levels should not exceed 4.5 mm/s (per ISO 10816), and noise levels should be ≤95 dB(A) at 1 meter (per ISO 11201). Blow bars are commonly made of high-chromium cast iron with chromium content ranging from Cr26 to Cr30, as per GB/T 8263.

These parameters are reference ranges and must be verified with the legal manufacturer or supplier for specific models and applications. Standards mentioned are for procurement and verification purposes only and do not imply certification or compliance of any particular product.
Working Principle
The impact crusher operates on the principle of rapid impact force. Material is fed into the crushing chamber where it encounters a high-speed rotor equipped with hammers or blow bars. As the rotor spins, these impactors strike the incoming material, propelling it against stationary impact plates or anvils lining the chamber walls. The repeated impacts cause the material to fracture and break apart. The size of the output material is controlled by adjusting the gap between the rotor and impact plates, as well as the rotor speed. Crushed material exits through adjustable discharge openings at the bottom of the chamber.
Common Materials
High-Chromium Steel, Manganese Steel
Technical Parameters
ParameterTypical rangeNotes & selection driver
Rotor DiameterRequired800–1600 mmDiameter of the rotating rotor assembly
Rotor WidthRequired600–2000 mmWidth of the rotor assembly
Maximum Feed SizeRequired300–800 mmLargest particle size that can be fed into the crusher
CapacityRequired50–500 t/hMaximum throughput capacity in tons per hour
Motor PowerRequired75–630 kWPower rating of the drive motor
Rotor SpeedRequired400–1200 rpmRotational speed of the rotor
WeightRequired5–40 kgTotal weight of the crusher assembly
Discharge Opening Adjustment Range20–100 mmAdjustable to control product size.
Operating Temperature-20–40 °COutside this range, lubricants and seals may fail.
Vibration≤4.5 mm/sExcessive vibration indicates imbalance or bearing wear.ISO 10816
Noise Level≤95 dB(A)At 1 m distance; may require hearing protection.ISO 11201
Blow Bar MaterialCr26–Cr30High chromium cast iron for wear resistance.GB/T 8263

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Rotor Assembly
    Primary rotating component that houses impact hammers and generates crushing force
    Material: High-strength steel with wear-resistant coatings
  • Impact Hammers/Blow Bars Part
    Wear parts that directly strike and break the material
    Material: High-chromium cast iron or manganese steel
  • Impact Plates/Anvils Part
    Stationary wear plates against which material is crushed
    Material: Manganese steel or composite alloys
  • Feed Hopper
    Receives and guides material into the crushing chamber
    Material: Mild steel plate with wear liners
  • Crushing Chamber
    Enclosed space where material impact and crushing occurs
    Material: Heavy-duty steel construction with replaceable liners
  • Drive Motor
    Provides rotational power to the rotor assembly
    Material: Electric motor components with protective housing
  • Discharge Opening
    Adjustable gap that controls final product size
    Material: Steel frame with hydraulic or mechanical adjustment mechanism
  • Hydraulic Opening System
    Allows for easy adjustment of impact plates and maintenance access
    Material: Hydraulic cylinders, valves, and steel components

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Impact Crusher.

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric (no pressure containment required)
other spec: Max feed size: 80-1500mm depending on model, Moisture content: <15% for optimal performance, Throughput capacity: 50-2000 t/h
temperature: -20°C to 80°C (operating ambient)
Media Compatibility
✓ Limestone and other sedimentary rocks ✓ Recycled concrete and demolition waste ✓ Asphalt and construction aggregates
Unsuitable: Highly abrasive materials like quartzite or materials with high silica content (causes excessive wear)
Sizing Data Required
  • Feed material characteristics (hardness, abrasiveness, moisture)
  • Required product size distribution (output gradation)
  • Desired throughput capacity (tons per hour)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Fatigue cracking of rotor components
Cause: Cyclic loading from repeated impact forces, material stress concentrations at weld joints or sharp corners, and inadequate material selection for high-impact applications.
Bearing seizure due to contamination
Cause: Ingress of crusher dust and fine particles through compromised seals, inadequate lubrication intervals, or poor sealing system design allowing abrasive material entry into bearing housings.
Maintenance Indicators
  • Unusual metallic grinding or knocking sounds during operation indicating component contact or bearing failure
  • Excessive vibration beyond baseline readings or visible shaking of the crusher frame during normal operation
Engineering Tips
  • Implement regular rotor balancing and alignment checks using vibration analysis to detect imbalance before catastrophic failure occurs
  • Establish a proactive sealing system maintenance program with scheduled inspection of labyrinth seals and purge air systems to prevent contaminant ingress into critical components

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 21873-1:2015 (Building construction machinery and equipment - Mobile crushers) ANSI/ASME B94.55M (Standard for Milling Cutters)

Quoted from the published standard.

Manufacturing Precision
  • Rotor shaft alignment: +/-0.05mm
  • Blow bar mounting surface flatness: 0.2mm
Quality Inspection
  • Ultrasonic Testing for rotor and main frame welds
  • Hardness Testing for wear parts (blow bars, liners)

Manufacturers of Impact Crusher

6 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Jiangsu Right Heavy Machinery Co.,Ltd.
Jiangsu, CN
Listed on the company's own website · profile compiled by CNFX from public sources
SANY Group
Taiwan, CN
Listed on the company's own website · profile compiled by CNFX from public sources
SBM (Shibang Industry & Technology Group Co., Ltd.)
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Shanghai SANME Mining Machinery Corp., Ltd.
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Shanghai Zenith Heavy Industry Co., Ltd.
Shanghai, CN
Also makes: Crushing Plant, Vibrating Screen, Belt Conveyor and 2 more
Listed on the company's own website · profile compiled by CNFX from public sources
Shenyang North Heavy Metallurgical Engineering Technology Co., Ltd.
Liaoning, CN
Listed on the company's own website · profile compiled by CNFX from public sources

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
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Manufacturing capability
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Inspection readiness
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Frequently Asked Questions

What materials are commonly used for impact crusher blow bars?

Blow bars are often made of high-chromium cast iron with chromium content ranging from Cr26 to Cr30, as per GB/T 8263. This material provides wear resistance for crushing hard materials.

How is the product size controlled in an impact crusher?

Product size is controlled by adjusting the gap between the rotor and impact plates, as well as the rotor speed. The discharge opening adjustment range is typically 20 to 100 mm.

What are typical capacity ranges for impact crushers?

Typical capacities range from 50 to 500 tons per hour, depending on the model and feed material. Motor power can range from 75 to 630 kW.

What maintenance signals should be monitored?

Excessive vibration (above 4.5 mm/s per ISO 10816) may indicate imbalance or bearing wear. Noise levels should not exceed 95 dB(A) at 1 meter. Operating temperature should stay within -20°C to 40°C to avoid lubricant and seal failure.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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