Peças para Britador de Mandíbulas
Placas de Mandíbula | Fixa e Oscilante | ATF
Placas de mandíbula fixa e oscilante em manganês Mn14-Mn22. Perfil dentado, classe e espessura conforme câmara, alimentação e dureza da rocha.
What Jaw Plates Do and Why Material Matters
Jaw crusher plates (also called jaw dies or jaw liners) are the primary wear components in jaw crushers. The fixed jaw plate mounts to the stationary frame, while the swing jaw plate (or movable jaw) attaches to the pitman and provides the crushing motion. Together, they create the crushing chamber that reduces feed material through compressive force.
Material selection directly determines wear life and cost per tonne. All ATF jaw plates are manufactured from austenitic manganese steel, which work-hardens under the compressive impact of crushing. The key variables are manganese content (affecting work-hardening potential) and chromium content (affecting initial hardness and carbide formation). Higher manganese grades work-harden to higher surface hardness but may be less cost-effective in lower-abrasion applications.
Precision-Cast Jaw Plates
Manufactured to OEM dimensional tolerances
Manganese Grade Selection by Application
Five jaw plate options covering every application from clean limestone to highly abrasive mining feeds.
| Material Grade | Hardness | Impact Tolerance | Typical Application |
|---|---|---|---|
| Mn13Cr2 | 180-220 HB (work-hardens to ~450 HB) | Muito alta | Calcário limpo, rocha mole, reciclagem com metal residual |
| Mn14Cr2 | 190-230 HB (work-hardens to ~480 HB) | Muito alta | Pedreira geral, cascalho de rio, abrasão moderada |
| Mn18Cr2 | 200-240 HB (work-hardens to ~500 HB) | Alta | Granito, basalto, rocha ígnea dura |
| Mn22Cr2 | 220-260 HB (work-hardens to ~550 HB) | Média-alta | Taconita, quartzito, alimentações mineradoras altamente abrasivas |
| Mn22 + TiC Composite | 220-260 HB base + 3200 HV TiC inserts | Média-alta | Abrasão extrema onde o Mn22 simples se desgasta muito rápido |
Classes padrão (2 options)
Mn13Cr2
- Hardness: 180-220 HB (work-hardens to ~450 HB)
- Impact: Muito alta
- Application: Calcário limpo, rocha mole, reciclagem com metal residual
Mn14Cr2
- Hardness: 190-230 HB (work-hardens to ~480 HB)
- Impact: Muito alta
- Application: Pedreira geral, cascalho de rio, abrasão moderada
Classe premium (1 options)
Mn18Cr2
- Hardness: 200-240 HB (work-hardens to ~500 HB)
- Impact: Alta
- Application: Granito, basalto, rocha ígnea dura
Serviço pesado (2 options)
Mn22Cr2
- Hardness: 220-260 HB (work-hardens to ~550 HB)
- Impact: Média-alta
- Application: Taconita, quartzito, alimentações mineradoras altamente abrasivas
Mn22 + TiC Composite
- Hardness: 220-260 HB base + 3200 HV TiC inserts
- Impact: Média-alta
- Application: Abrasão extrema onde o Mn22 simples se desgasta muito rápido
Note: Work-hardened hardness values are approximate and depend on feed material characteristics, crusher settings, and operating conditions. Higher manganese content enables higher work-hardened hardness but requires sufficient impact energy to achieve full work-hardening. Contact ATF for application-specific guidance.
Work-Hardening Progression by Manganese Grade
Higher manganese grades achieve higher work-hardened surface hardness but require adequate impact energy to activate the work-hardening mechanism. Fine feeds or low-energy applications may not fully work-harden higher grades.
Tooth Profile Selection
Tooth geometry affects grip, fines generation, and wear pattern. Select the profile that matches your feed characteristics.
Corrugado padrão
Pedreira geral, desgaste uniforme
O padrão de dentes simétrico proporciona aderência equilibrada e distribuição uniforme do desgaste. Padrão da indústria para a maioria das aplicações de pedreira.
Dente profundo
Alimentação grande, melhor aderência
O perfil de dente mais profundo aumenta a aderência em grandes blocos e melhora a ejeção de finos. Ideal para a britagem primária de alimentação superdimensionada.
Super Grip
Material plano ou em placas
A geometria agressiva do dente impede que o material plano deslize. Projetado para processar rocha de pedreira em placas ou material intemperizado.
Plano (Liso)
Reciclagem, material pegajoso
Face lisa sem dentes para reciclagem de concreto e asfalto. Reduz o acúmulo de material e os congestionamentos em alimentações pegajosas.
Perfil de reciclagem
Demolição e construção, demolição mista
Geometria de dente modificada para resíduos de construção e demolição. Lida com alimentações mistas com metal residual ocasional.
Custom profiles available. ATF can manufacture tooth profiles to customer drawing for specific applications. Contact us with your requirements for dimensional confirmation and pricing.
How to Choose: Grade First, Then Profile
Jaw plate selection follows two steps. First, identify the correct manganese grade based on feed abrasiveness and impact conditions. Second, select the tooth profile that matches your material characteristics.
1 Step 1 — Manganese Grade by Feed Conditions
Mn13Cr2 / Mn14Cr2
Alto impacto, abrasão moderada
Máxima tenacidade com bom encruamento. Melhor resistência ao impacto para aplicações com metal residual frequente ou alimentação de grande porte.
Mn18Cr2
Impacto e abrasão equilibrados
Padrão da indústria para granito e basalto. O teor mais alto de manganês aumenta o potencial de encruamento sem sacrificar a tenacidade.
Mn22Cr2
Alta abrasão, impacto controlado
Máximo encruamento para alimentações extremamente abrasivas. Tolerância ao impacto ligeiramente reduzida em comparação com as classes inferiores.
Mn22 + TiC Composite
Abrasão extrema, campanhas longas
Os insertos de TiC (3200 HV) fornecem dureza localizada na face de britagem. Prolonga a vida útil onde o Mn22 simples se desgasta muito rápido.
Not sure which grade fits your application?
Send your feed material description and crusher model — ATF recommends the right grade within 24 hours.
2 Step 2 — TiC Composite Upgrade
TiC (titanium carbide) rods embedded in the crushing face provide localised hardness of 3200 HV. This composite option is available on Mn22 base plates for applications where plain manganese wears too fast.
When to Upgrade to TiC
- As placas de Mn22 simples se desgastam 40%+ mais rápido que a campanha alvo
- Alimentações altamente silicosas (>70% SiO2)
- Objetivo de estender os intervalos de parada
- Os cálculos de custo por tonelada favorecem maior vida útil
When NOT to Use TiC
- Metal residual grande e frequente na alimentação
- Material pegajoso ou argiloso que se acumula na face de britagem
- Vida útil adequada já alcançada com manganês simples
- Aplicações onde o sobrecusto do TiC excede o benefício de vida útil
Lead Times by Material Grade
| Material Grade | Typical Lead Time | Why |
|---|---|---|
| Mn13Cr2 / Mn14Cr2 (plain) | 2-3 weeks | Produção em alto volume, comumente disponível em estoque |
| Mn18Cr2 (plain) | 2-4 weeks | Programação de produção padrão |
| Mn22Cr2 (plain) | 3-4 weeks | Tratamento térmico especializado necessário |
| Mn22 + TiC Composite | 5-7 weeks | A colocação de hastes de TiC requer um processo de fundição secundário |
Lead times vary by plate dimensions, order quantity, and current production schedule. Confirm lead time at order placement. Standard Mn18 plates for Metso C-Series and Sandvik CJ models are typically available from stock.
Planning a shutdown?
Check lead time and stock availability for your specific jaw plate dimensions.
Mn13Cr2 & Mn14Cr2 Jaw Plates
Mn13Cr2 and Mn14Cr2 provide the highest impact tolerance of any manganese grade. These standard grades work-harden to approximately 450-480 HB under compressive impact — sufficient for most aggregates and recycling applications without the cost premium of higher grades.
Recommended applications: Clean limestone and dolomite, recycling operations with tramp metal risk, portable crushing operations where material varies, and any application where maximum toughness is prioritised over maximum work-hardened hardness.
When to Use Lower Grades
Mn13/Mn14 is often the correct choice even when higher grades are available. If your current plates deliver acceptable wear life without cracking, upgrading to Mn18 or Mn22 may not be cost-effective. The higher grades are reserved for genuinely abrasive feeds where lower grades wear excessively fast.
Standard Manganese Jaw Plates
Mn13Cr2 / Mn14Cr2 for balanced performance
Mn18Cr2 Premium Grade
Industry standard for granite and basalt
Mn18Cr2 Jaw Plates
Mn18Cr2 (ASTM A128 Grade C equivalent) is the industry standard for hard rock quarrying. The increased manganese content enables work-hardening to approximately 500 HB while retaining high impact tolerance. This grade represents the optimal balance for granite, basalt, gabbro, and similar hard igneous rock.
Work-hardening mechanism: Under the compressive impact of crushing, the austenitic structure undergoes strain-induced transformation. The surface progressively hardens while the core remains tough, providing both abrasion resistance and impact absorption.
- Granite, basalt, gabbro, diorite
- River gravel and alluvial deposits
- Mixed hard rock quarrying
Mn22Cr2 Heavy Duty Jaw Plates
Mn22Cr2 provides the highest work-hardening potential of any standard manganese grade, achieving approximately 550 HB surface hardness under optimal conditions. This grade is reserved for highly abrasive mining feeds where Mn18 wears excessively fast.
Typical applications: Taconite (iron ore), quartzite, high-silica aggregates, and other materials with silica content exceeding 70%. Impact tolerance is slightly reduced compared to Mn18 — this is an acceptable trade-off when abrasion is the dominant wear mechanism.
Important Consideration
Mn22 requires sufficient impact energy to achieve full work-hardening. In low-impact applications (fine feeds, low crusher speed), the surface may not harden fully, and Mn18 may provide equivalent performance at lower cost. Verify that the application generates adequate impact before specifying Mn22.
Mn22Cr2 Heavy Duty Grade
Maximum work-hardening for abrasive feeds
Mn22 + TiC Composite
Titanium carbide rods at 3200 HV
Mn22 + TiC Composite Jaw Plates
TiC (titanium carbide) rods embedded in the crushing face provide localised hardness of 3200 HV — significantly harder than any work-hardened manganese surface. The Mn22 base retains its impact tolerance while the TiC rods resist edge rounding in extremely abrasive feeds.
The TiC upgrade is justified when: Plain Mn22 plates wear 40% or more faster than required campaign length, and the cost premium of TiC is offset by reduced changeout frequency and extended production time between shutdowns.
TiC vs Plain Manganese
TiC composite plates typically provide 1.5-2.5x the wear life of plain Mn22 in highly abrasive applications. The actual improvement depends on feed silica content, particle size, and crushing parameters. ATF provides application-specific recommendations based on operating conditions.
Jaw Plate Gallery
Fixed and swing jaw plates manufactured to OEM specifications for all major jaw crusher brands.
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Mn18Cr2 Fixed Jaw Plate
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Primary Swing Jaw Plate
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Mn22Cr2 Heavy Duty Plates
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Deep Tooth Tooth Profile Detail
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TiC Insert Mn22 + TiC Composite
-
Composite TiC Insert Pattern
Not Sure Which Grade is Right?
Our application engineers provide free technical consultations. Tell us your crusher model, feed material, and current wear patterns — we'll recommend the optimal jaw plate grade for your operation.
Plate Flipping and Wear Management
Plate Flipping Schedule
| Wear Stage | Action | Purpose |
|---|---|---|
| 30-40% desgastada | Inverter placa fixa 180° | Expõe a face de britagem não desgastada, duplica a vida útil |
| 50-60% desgastada (total) | Inverter mandíbula oscilante 180° | A mandíbula oscilante geralmente se desgasta mais rápido na extremidade de descarga |
| CSS se aproximando do mínimo | Substituir ambas as placas | As placas desgastadas não conseguem manter o ajuste seguro do lado fechado |
Before Flipping
Always inspect plates for cracks before flipping. Cracked plates should be replaced, not flipped — a crack may propagate under continued stress and cause catastrophic failure. Check mounting bolt holes for elongation or damage.
CSS Monitoring & Wear Indicators
Engrossamento da granulometria do produto
Cause: O desgaste da placa aumenta o CSS
Action: Ajustar o CSS ou planejar a troca de placa
Redução da capacidade
Cause: O desgaste afeta a eficiência de britagem
Action: Verificar perfis de placa, considerar substituição
Padrão de desgaste irregular
Cause: Segregação de alimentação ou desalinhamento
Action: Inspecionar distribuição de alimentação, verificar alinhamento da mandíbula
Deslizamento de material
Cause: Dentes desgastados lisos (glasuramento)
Action: Substituir placas, verificar especificação do ângulo de pega
Nip Angle and Material Grip
The nip angle is the angle between the fixed and swing jaw faces. For most rock types, the nip angle should be between 19° and 23° to ensure material is gripped without slipping. Worn plates with reduced tooth height effectively increase the nip angle, causing material to slip rather than being crushed.
If material begins slipping despite CSS being within specification, the plate tooth profile has worn too smooth. Replace plates to restore proper grip. Deeper tooth profiles may be specified for slabby or difficult-to-grip materials.
19°–23°
Optimal Nip Angle Range
Varies by material type
Common Jaw Plate Problems and Solutions
Placas trincadas ou quebradas
Possible Causes:
- Impacto de metal residual
- Tratamento térmico incorreto
- Aperto excessivo dos parafusos de montagem
Recommended Solutions:
- Melhorar a detecção de metais a montante
- Verificar se a especificação da liga corresponde à aplicação
- Seguir as especificações de torque OEM
Desgaste prematuro (vida mais curta que o esperado)
Possible Causes:
- Alimentação mais abrasiva do que o previsto
- Classe de manganês incorreta selecionada
- Encruamento insuficiente (alimentação fina)
Recommended Solutions:
- Atualizar para uma classe de Mn mais alta ou TiC
- Revisar a análise do material de alimentação
- Garantir energia de impacto adequada na face de britagem
Desgaste irregular na face da placa
Possible Causes:
- Distribuição segregada de alimentação
- Desalinhamento da estrutura da mandíbula
- Alimentação de tamanho único criando carga pontual
Recommended Solutions:
- Instalar placa de distribuição de alimentação
- Verificar e calçar o alinhamento da estrutura
- Misturar tamanhos de alimentação quando possível
Deslizamento de material / aderência deficiente
Possible Causes:
- Perfil de dente desgastado
- Ângulo de pega muito raso
- Placa muito lisa para o tipo de material
Recommended Solutions:
- Substituir placas antes que os dentes se desgastem completamente
- Verificar especificação do ângulo da mandíbula
- Considerar perfil de dente mais profundo
Glasuramento (superfície não endurecendo)
Possible Causes:
- Alimentação muito fina para britador de mandíbulas
- Energia de impacto muito baixa
- Classe de Mn muito alta para a aplicação
Recommended Solutions:
- Pré-peneirar finos, alimentar material mais grosseiro
- Verificar taxa de alimentação para manter alimentação afogada
- Considerar classe de Mn mais baixa (Mn13/14)
Finos excessivos no produto
Possible Causes:
- Placas desgastadas além do limite
- CSS muito apertado
- Rebritagem do produto na descarga
Recommended Solutions:
- Substituir placas para restaurar o perfil
- Ampliar CSS conforme especificação
- Verificar a calha de descarga para detectar bloqueios
Compatible Crusher Models
ATF jaw plates are manufactured to the dimensional tolerances of the following jaw crusher lines. Material recommendations based on typical application — confirm with ATF for specific operating conditions.
| OEM | Models | Recommended Grade |
|---|---|---|
| Metso | C80 C96 C100 C106 C110 C116 C120 C125 C130 C140 C145 C150 C160 C200 | Mn18 for standard quarrying, Mn22 for abrasive feeds |
| Sandvik | CJ211 CJ411 CJ412 CJ612 CJ613 CJ615 CJ815 UJ210 UJ310 UJ440i | Mn18 for granite/basalt, Mn14 for recycling |
| Terex Finlay | J-960 J-1160 J-1170 J-1175 J-1170AS J-1480 | Mn18 general quarrying |
| Kleemann | MC 100 MC 110 MC 120 MC 125 MC 140 MOBICAT | Mn18 standard, Mn22 for mining |
| McCloskey | J35 J40 J45 J50 J67 | Mn14 recycling, Mn18 quarry |
| Komatsu | BR380JG BR480RG BR550JG | Mn18 general purpose |
| Telsmith | 2238 2550 3042 3244 3442 3448 4448 5160 5163 | Mn18 standard, Mn22+TiC for taconite |
| Lippmann | 3042 3650 4248 5062 | Mn22 for hard rock mining |
| Eagle | 500 1000 1200 1400 2036 2238 2442 3042 | Mn18 aggregate, Mn22 mining |
| KPI-JCI | KODIAK K300 K400 K500 PIONEER 3042 4030 5060 | Mn18 general purpose |
Model not listed? Contact ATF with the part number or jaw dimensions. Most jaw plates can be manufactured to drawing within 3–5 weeks.
Jaw Plate Dimensions and Specifications
Critical dimensions for jaw plate fit: length, width, thickness, mounting hole pattern, and tooth profile. ATF requires at least one of the following to confirm dimensional fit:
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OEM Part Number
e.g. Metso 814328513400
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Crusher Model & Serial
For cross-reference to OEM specs
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Dimensional Drawing
With tolerances specified
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Physical Measurement
L × W × T, hole pattern, tooth pitch
Jaw plates should be ordered as matched sets (fixed + swing) to ensure consistent crushing performance and even wear. Mixing old and new plates creates uneven wear patterns and may affect product gradation.
Quick Quote Requirements
- Crusher brand and model
- Part number or dimensions
- Feed material type
- Current grade / wear issues
- Quantity (typically matched sets)
Not sure about specifications? Send photos of your worn plates and crusher nameplate — our engineers can identify the correct parts.
Get a QuoteReady to order?
Send your OEM part number or jaw drawing for dimensional confirmation and pricing.
Jaw Plate FAQs
Find answers to common questions about jaw plate materials, selection, maintenance, and ordering. Can't find what you're looking for?
Contact Our TeamWhat is the difference between fixed and swing jaw plates?
How do I choose between Mn14, Mn18, and Mn22 grades?
When should I upgrade to TiC composite jaw plates?
Can jaw plates be flipped to extend wear life?
How do I measure the correct CSS (closed-side setting)?
What information does ATF need to quote jaw plates?
Ready to Order Jaw Plates?
Stock available for popular models. Custom orders manufactured in 3–5 weeks. Factory-direct pricing with technical support from experienced engineers.
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