Qual é a diferença entre barras de impacto de cromo e de cerâmica?

As barras de impacto de cromo oferecem bom desempenho geral a menor custo. As barras de impacto com insertos cerâmicos utilizam insertos de alumina-zircônia para alcançar 2 a 3 vezes maior vida útil em aplicações abrasivas, embora com custo inicial mais elevado. O custo por tonelada total é frequentemente menor com cerâmicas.

Como saber quando substituir as barras de impacto?

Substitua as barras de impacto quando a profundidade de desgaste atingir os indicadores de substituição ou quando a produtividade/qualidade do produto diminuir notavelmente. Inspeções regulares durante as paradas de manutenção ajudam a otimizar o momento da substituição.

As barras de impacto podem ser rotacionadas para estender a vida útil?

Sim, a maioria das barras de impacto pode ser rotacionada 180° quando um lado está desgastado, efetivamente dobrando a vida útil utilizável. Alguns modelos permitem rotação em 4 posições. Verifique o design específico da sua barra de impacto para opções de rotação.

Peças para Britador HSI

Peças para Britador HSI | Barras de Impacto e Desgaste | ATF

Peças para britadores HSI: barras de impacto, placas de impacto, revestimentos laterais, rotores e fixações. Opções martensíticas, ferro fundido cromo e MMC.

Barras de impacto Insertos cerâmicos Placas de impacto

HSI Impact Crusher Parts

Complete Wear Part Solutions for Horizontal Shaft Impact Crushers

Horizontal Shaft Impact (HSI) crushers reduce material through high-velocity impact rather than compression. A horizontal rotor spinning at 25–40 m/s tip speed carries mounted blow bars that strike incoming feed, projecting fragments against stationary apron plates for secondary size reduction. This impact-based mechanism produces excellent product shape with high reduction ratios — making HSI crushers the standard for limestone, concrete recycling and aggregate production.

Every wear component in an HSI crusher — from the blow bars that deliver the primary impact to the fixation bolts that secure them — works as part of an integrated system. Wear life, product quality and operating safety depend on correct material selection, proper installation torque and disciplined maintenance schedules. ATF engineers and manufactures the complete range of HSI wear parts and spare components to OEM specifications, with material options optimised for your specific feed conditions.

50+ OEM Models

9 Alloy Options

OEM-Fit Guaranteed

1–2 Week Stock Delivery

HSI impact crusher blow bars manufactured by ATF — martensitic, high-chrome and ceramic composite alloys

ATF blow bars ready for dispatch — the primary wear part in every HSI crusher. Available in 9 alloy configurations matched to specific feed conditions.

How It Works

HSI Crushing Mechanism

Understanding how each component contributes to the crushing process helps explain why material selection and maintenance practices directly affect wear life, product quality and operating cost.

Primary Impact

Feed material enters through the top of the crusher and falls into the path of the spinning rotor. Blow bars mounted on the rotor strike the material at 25–40 m/s tip speed, fracturing it through instantaneous energy transfer. This first impact provides the majority of size reduction — typically achieving 10:1 to 20:1 reduction ratios.

Secondary Reduction

Fragments launched from the rotor collide with the primary apron (impact plate) at high velocity. The adjustable apron gap controls how much secondary crushing occurs — a tighter gap produces finer product but increases wear. Material that doesn't pass the gap is deflected back toward the rotor for additional impacts.

Product Discharge

Properly sized material passes through the gap between the rotor and the secondary apron, falling to the discharge conveyor. Some HSI designs include a third apron stage for additional refinement. The cascading impact cycle produces cubical product shape — a key advantage over compression crushers for aggregate specification compliance.

Components

HSI Crusher Wear Parts & Spare Components

Every HSI crusher requires six categories of wear and structural parts. Each component page provides detailed material options, OEM compatibility tables and application-specific guidance.

Primary Wear Part

Blow Bars

The primary wear element. Rotor-mounted bars that strike incoming feed material at tip speeds of 25–40 m/s. Available in manganese, martensitic, high-chrome and ceramic composite alloys. Material selection determines wear life, impact tolerance and cost per ton crushed.

9 alloy options Flip at 25–30% wear 1–4 position rotation

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Chamber Wear Part

Impact Plates & Aprons

Stationary crushing surfaces (primary and secondary aprons) that receive material deflected from the rotor. Apron gap setting controls product gradation. Wear concentrates at the material impact zone — typically the lower third of the primary apron.

Mn18–Mn22 standard Adjustable gap Bolt-on replacement

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Housing Protection

Side Liners

Protect the crusher housing side walls from abrasive material flow. Side liners absorb redirected material that escapes the primary crushing zone. Neglected side liners expose the cast housing to irreversible wear damage.

Manganese or chrome Bolt-on panels Model-specific profiles

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Core Assembly

Rotors & Assemblies

The central rotating assembly that carries blow bars at high speed. Rotor balance is critical — a 1% weight imbalance between opposing bars generates destructive vibration that damages bearings, seals and the crusher frame. Worn or cracked rotors compromise bar seating and operator safety.

±1% bar balance 2–4 bar positions Dynamic balancing

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Structural Component

Shafts

Forged alloy steel main shafts that transmit drive torque to the rotor. Shafts operate under combined bending, torsion and impact loading. Dimensional accuracy at bearing journals and keyways is critical for rotor alignment and vibration control.

Forged alloy steel OEM tolerances Ultrasonic tested

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Safety-Critical

Fixation Bolts & Hardware

Grade 10.9 and 12.9 fasteners that secure blow bars in the rotor. Bolt failure under operation can eject a blow bar at rotor speed — a critical safety hazard. Correct torque, grade and thread engagement depth are non-negotiable.

Grade 10.9–12.9 Torque-spec'd Model-matched threads

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Material Guide

Material Selection for HSI Crusher Parts

Material choice is the single most important decision affecting HSI crusher economics. The wrong alloy in the wrong application doesn't just wear faster — it fails catastrophically. ATF uses a two-step selection framework: choose the base alloy family for your feed conditions first, then evaluate composite upgrades (TiC or ceramic inserts) for additional wear life.

Manganese Steel

Impact: Very High

Grades

Mn14 / Mn18Cr2 / Mn22Cr3

Best For

Primary crushing, demolition, heavy rebar contamination

Relative Wear Life

Baseline

Limitation: Glazes in low-energy secondary applications — avoid below 25 m/s tip speed

Martensitic Steel

Impact: Medium-High

Grades

48–54 HRC

Best For

Concrete recycling, asphalt, mixed demolition with moderate rebar

Relative Wear Life

1.5–2× manganese in abrasive feeds

Limitation: Not suitable for large uncontrolled tramp metal — use manganese instead

High-Chrome Iron

Impact: Brittle

Grades

60–64 HRC (standard) / 55–58 HRC (tempered)

Best For

Clean abrasive secondary/tertiary crushing — limestone, granite, aggregate

Relative Wear Life

2–3× manganese in clean feeds

Limitation: Shatters on rebar or tramp metal impact — requires functioning metal detection

Ceramic Composite (MMC)

Impact: Depends on base alloy

Grades

Base alloy + 1600 HV Al₂O₃-ZrO₂ inserts

Best For

Ultra-abrasive clean feeds where maximum wear life justifies higher cost

Relative Wear Life

2–3× base alloy alone

Limitation: Ceramic inserts spall under point-load impact — clean feed preparation mandatory

Quick Selection Framework

Heavy rebar or unpredictable tramp metal? → Manganese Mn18Cr2 (or Mn22Cr3 for extreme impact)

Concrete/asphalt recycling with moderate rebar? → Martensitic steel 48–54 HRC

Clean abrasive aggregate (limestone, granite)? → High-chrome 60–64 HRC (functioning metal detection required)

Feed is clean AND wear life is the priority? → Add ceramic inserts to the chosen base alloy

Not sure which applies? Contact ATF with your feed material, throughput and current wear experience — we'll recommend the optimal configuration.

OEM Compatibility

Compatible HSI Crusher Brands & Models

ATF manufactures aftermarket parts to OEM dimensional specifications. All parts are verified against original drawings before production. Dimensional tolerance: length ±2 mm, weight ±1%, bolt holes ±0.5 mm.

Metso

Models

NP1007, NP1110, NP1213, NP1315, NP1520, NP1620

Nordberg NP series — most common globally

Sandvik

Models

CI411, CI511, CI711, QI240, QI341, QI441

Stationary CI and mobile QI series

Terex / Powerscreen

Models

I-44, I-54, CR038, I-1312, I-1412

Including Cedarapids and legacy Pegson models

Kleemann

Models

MR 110 Z, MR 130 Z, MR 170 Z

Wirtgen Group mobile impactors

McCloskey

Models

I34, I44, I54

I-series mobile impact crushers

Hazemag

Models

AP-5, AP-6, AP-7, AP-9, APK-30, APK-40, APK-50

Stationary primary and secondary impactors

Don't see your crusher model? ATF maintains patterns and drawings for 50+ HSI crusher models including discontinued and legacy equipment. Send your crusher nameplate or part number for confirmation.

Verify Your Model

Need HSI Parts Fast?

Stock blow bars and common wear parts ship within 1–2 weeks. Send your crusher model and part requirements for a same-day quotation.

Get a Quote Call +1 308 465 1950

Maintenance Guide

HSI Crusher Maintenance Best Practices

Disciplined maintenance extends wear part life, prevents unplanned downtime and protects the crusher frame and bearings from damage caused by worn or unbalanced components.

Every Shift

Visual inspection through access doors — check for loose or shifted bars
Listen for abnormal vibration or metallic rattling during warm-up
Verify hydraulic apron pressure gauges read within spec

Weekly

Measure blow bar wear depth at three points per bar (leading edge, centre, trailing edge)
Check apron gap settings against target CSS — adjust if product gradation has shifted
Inspect side liners for breakthrough wear into housing

Monthly

Weigh accessible blow bars — opposing bars must remain within ±0.5 kg for balance
Inspect fixation bolts for torque loss, thread damage or elongation
Check rotor disc and bar seating surfaces for cracks or deformation

At Rotation / Replacement

Flip bars at 25–30% wear, reposition leading→trailing at 50–60%, replace at 70–80%
Weigh all bars — match opposing positions within ±0.5 kg
Inspect rotor for cracks using dye penetrant or ultrasonic testing
Replace all fixation bolts — never reuse stretched fasteners
Verify bar-to-apron clearance meets OEM spec before restart

Fixation Bolt Torque Reference

Bolt Size	Grade 8.8	Grade 10.9	Grade 12.9
M16	210 Nm	295 Nm	350 Nm
M20	410 Nm	580 Nm	690 Nm
M24	710 Nm	1,000 Nm	1,190 Nm
M30	1,400 Nm	1,970 Nm	2,340 Nm

Values for dry, unlubricated threads. Always verify against your OEM manual — some designs specify lubricated torque values which are significantly lower.

Troubleshooting

Common HSI Crusher Problems & Solutions

Recognising wear patterns and operational symptoms early prevents costly damage to the rotor, bearings and crusher frame. Contact ATF technical support if you need help diagnosing an issue.

Uneven Blow Bar Wear

Probable Causes

Off-centre feed distribution — material favouring one side of rotor
Worn or misaligned feed chute directing material to specific bars
One apron set tighter than the other, creating asymmetric load

Corrective Actions

Check feed chute alignment and wear plates
Measure and equalise apron gaps on both sides
Rotate bar positions to redistribute remaining wear life

Premature Bar Cracking / Breakage

Probable Causes

Tramp metal (rebar, loader teeth, hammers) passing metal detection
Wrong material grade — brittle alloy used in high-impact application
Fixation bolts over-torqued or under-torqued, creating stress risers

Corrective Actions

Verify metal detection and magnet systems are functioning
Review alloy selection against actual feed conditions
Check bolt torque against OEM specification — replace if stretched

Manganese Bar Glazing

Probable Causes

Insufficient impact energy — rotor speed too low for feed size
Fine feed material that doesn't generate enough impact force
Manganese used in secondary/tertiary position where martensitic is correct

Corrective Actions

Increase rotor speed (if within OEM limits) or feed size
Switch to martensitic or high-chrome for low-energy applications
Verify manganese is only used where work-hardening can activate

Excessive Vibration

Probable Causes

Weight imbalance between opposing blow bars (>1% difference)
Loose or missing fixation bolts allowing bar movement
Worn main bearings or rotor journal damage

Corrective Actions

Weigh all bars — match opposing positions within ±0.5 kg
Inspect and re-torque all fixation bolts
Check bearing clearances and shaft journal condition

Reduced Throughput / Poor Product Shape

Probable Causes

Worn aprons no longer providing effective secondary crushing
Blow bars worn past 70–80% — insufficient protruding edge for material contact
Apron gap too wide or narrow for target product specification

Corrective Actions

Replace worn aprons — inspect for grooving and through-wear
Replace blow bars if worn beyond rotation/flip limits
Re-calibrate apron gaps to target CSS for desired product size

FAQ

Frequently Asked Questions

Answers to common questions about HSI impact crusher parts, material selection, maintenance and ordering. Can't find what you're looking for?

Contact Our Team

What is the difference between an HSI and a VSI crusher?

An HSI (Horizontal Shaft Impact) crusher uses a horizontal rotor with mounted blow bars to strike feed material against stationary aprons. A VSI (Vertical Shaft Impact) crusher uses a vertical rotor that accelerates material outward against a rock shelf or anvil ring. HSI crushers are used for primary and secondary reduction of softer to medium-hard rock. VSI crushers are used for tertiary and quaternary shaping — primarily manufactured sand and fine aggregate production.

Which blow bar material should I use for concrete recycling?

For concrete recycling with rebar contamination, martensitic steel (48–54 HRC) is the standard recommendation. It tolerates moderate rebar impact without fracture while providing 1.5–2× the wear life of manganese in abrasive applications. For heavy rebar contamination (>5% by weight), manganese Mn18Cr2 provides maximum impact toughness. Never use standard high-chrome in recycling — it shatters on rebar contact.

How often should HSI crusher blow bars be rotated?

Flip blow bars 180° at 25–30% wear to expose the unworn face. Reposition bars from leading to trailing rotor position at 50–60% wear. Replace bars at 70–80% total wear. Always weigh bars before installing — opposing bars must be within ±0.5 kg to prevent rotor imbalance and bearing damage.

What causes blow bars to crack instead of wearing evenly?

Cracking is almost always caused by impact overload — tramp metal passing through failed metal detection, oversized feed exceeding the crusher's design capacity, or using a brittle alloy (high-chrome) in an application with unpredictable feed. Incorrect bolt torque can also create stress concentration points that initiate cracks.

Are ATF impact crusher parts compatible with OEM equipment?

Yes. ATF manufactures aftermarket parts to OEM dimensional specifications for all major HSI crusher brands including Metso NP series, Sandvik CI/QI series, Terex/Powerscreen, Kleemann, McCloskey and Hazemag. We verify fit with dimensional drawings before shipping and guarantee OEM-equivalent installation.

What information does ATF need to quote HSI crusher parts?

At minimum: crusher make and model (e.g. Metso NP1213, Sandvik QI341), the parts needed (blow bars, aprons, side liners, etc.), and quantity. For material recommendations, also provide your feed material type, throughput, and current wear experience. Photos of worn parts and the crusher nameplate are helpful if part numbers are unavailable.

What is the typical lead time for HSI crusher parts?

Stock blow bars and common wear parts ship within 1–2 weeks. Standard production items require 4–6 weeks. Custom parts, non-standard alloys or large orders may need 6–10 weeks. Express manufacturing is available for emergency breakdowns — contact ATF directly for urgent requirements.

Can ceramic blow bars be used in primary crushing?

Generally no. Ceramic inserts (1600 HV alumina-zirconia) are hard but brittle. Primary crushing involves unpredictable feed with potential tramp metal, oversized material and high impact energy. Ceramic composites perform best in clean secondary and tertiary applications with consistent, prescreened feed and functioning metal detection.

Ready to Optimise Your HSI Crusher Performance?

ATF engineers respond within 24 hours with material recommendations, dimensional verification and competitive pricing for your specific crusher and application.

Request a Free Quote

50+ OEM Models

9 Alloy Options

24h Quote Response

1–2wk Stock Delivery

Peças Disponíveis (137)

Nome da Peça

Marca / Modelo

SKU

Ação

Eagle 1000 (UM-15) Blow bar

Eagle · 1000 (UM-15)

Peças para Britador HSI | Barras de Impacto e Desgaste | ATF

Complete Wear Part Solutions for Horizontal Shaft Impact Crushers

HSI Crushing Mechanism

Primary Impact

Secondary Reduction

Product Discharge

HSI Crusher Wear Parts & Spare Components

Blow Bars

Impact Plates & Aprons

Side Liners

Rotors & Assemblies

Shafts

Fixation Bolts & Hardware

Material Selection for HSI Crusher Parts

Manganese Steel

Martensitic Steel

High-Chrome Iron

Ceramic Composite (MMC)

Quick Selection Framework

Compatible HSI Crusher Brands & Models

Metso

Sandvik

Terex / Powerscreen

Kleemann

McCloskey

Hazemag

Need HSI Parts Fast?

HSI Crusher Maintenance Best Practices

Every Shift

Weekly

Monthly

At Rotation / Replacement

Fixation Bolt Torque Reference

Common HSI Crusher Problems & Solutions

Probable Causes

Corrective Actions

Probable Causes

Corrective Actions

Probable Causes

Corrective Actions

Probable Causes

Corrective Actions

Probable Causes

Corrective Actions

Frequently Asked Questions

Ready to Optimise Your HSI Crusher Performance?

Peças Disponíveis (137)

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