Shanghai Bogvik Wear Material Co., ltd, Room 305, Chunshen Building, Zhangjiang Town, Pudong New Area, Shanghai (2026)

30/04/2026

CH430 Cone Crusher Assembly:
Critical Steps & Technical Details

Foundation & Frame Setup
Level the bottom shell within 0.1 mm/m longitudinally and transversely using a precision level. Misalignment causes uneven loading, oil film failure, and overheating.

Torque foundation bolts to specified values; apply secondary grouting to eliminate voids and dampen vibration.
Inspect top/bottom shell mating surfaces for flatness ±0.25 mm/360° to prevent leaks and structural fretting.

Main Shaft & Eccentric Assembly
Handle the main shaft with lifting tools BG00227691/BG00227699; protect journal surfaces from scratches.

Install step bearing set BG00259459 with even contact; check thrust clearance per specs.
Heat eccentric bushing uniformly for interference fit; avoid localized overheating. Match throw: 16–19–22, 22–25–29, or 29–32–34–36 mm.
Set correct gear backlash; confirm smooth rotation without binding before closing the housing.

Hydroset Cylinder & Hydraulics
Seat chevron packing 442.7897 squarely to avoid leaks; torque capscrews evenly in cross pattern.
Calibrate position transmitter (ASRi™) and set accumulator pre-charge: 5.0 MPa (non-ASRi) or 6.0 MPa (ASRi/SanRemo).

Pressure-test circuits at 1.25× working pressure; hold 30 minutes with no external leakage.
Crushing Chamber & Wear Parts
Match concave & mantle by chamber type: EC/C/MC/M/MF/F/EF paired with A/B/S/EF/HC/Flexifeed B mantles.
Torque concave fastener kit BG00741360 to spec; confirm disc springs 863.0032 are properly compressed.
Install dust collar 442.7929 and seal ring; set correct gap to prevent dust ingestion.
Verify closed-side setting (CSS) between 4–41 mm using feeler gauges before test run.
Drive, Lubrication & Seals
Align motor and pulley centers; tension V‑belts to eliminate slippage and uneven wear.
Fill l**e system with specified oil; prime circuits and check flow/pressure.
Replace all O‑rings, gaskets, and oil seals during assembly; use recommended sealant 873.1112.
Test dust‑seal air unit; maintain positive pressure to keep grit out of bearings.
Final Checks & Run‑in
Confirm all fasteners are torqued; verify safety guards and warning signs are installed.
Run dry (no load) for 30–60 minutes; monitor oil temp, pressure, and noise.
Load-test gradually; check CSS stability and liner gap consistency.
Adhere to these details to ensure optimal performance, minimize downtime, and extend component life.

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30/04/2026

Spider Cap for USA Metal Shredder
1. Chemical Composition Analysis
Spider Cap is made of low-carbon low-alloy wear-resistant steel.
Carbon (C): Range from 0.192% to 0.238%, average about 0.21%. It belongs to low carbon grade (C＜0.25%). Low carbon content guarantees excellent matrix toughness and avoids brittle fracture under impact load.
Silicon (Si): 0.40%–0.52%, acting as deoxidizer and strengthening ferrite.
Manganese (Mn): 0.51%–0.65%, improves hardenability and strength.
Chromium (Cr): 1.40%–1.53%, enhances hardenability, wear resistance and corrosion resistance.
Molybdenum (Mo): 0.42%–0.48%, restrains temper brittleness, improves high-temperature stability and impact toughness.
Nickel (Ni): 0.53%–0.64%, further optimizes toughness and hardenability, matches Cr–Mo to obtain balanced mechanical properties.
Impurity elements:
Phosphorus (P): 0.017%–0.031%, controlled within standard allowable limit;
Sulfur (S): 0.0075%–0.0217%, most batches keep low level to prevent hot brittleness.
Overall chemical composition is stable in batches, with strictly controlled harmful impurities, belonging to typical Cr–Mo–Ni low-alloy wear-resistant steel formulation.
2. Mechanical Performance Prediction
Based on chemical composition and heat treatment process, the estimated mechanical properties are as follows:
Hardness: HRC 36-38
Balanced hardness for both wear resistance and impact resistance, suitable for medium impact crushing working conditions.
Impact toughness: ≥ 20 J/cm²
Low-carbon matrix plus Cr–Mo–Ni alloying provides high toughness, effectively preventing crack and breakage during service.
Metallographic structure:
Mainly tempered sorbite + fine dispersed carbide, uniform microstructure, good fatigue resistance and abrasion resistance.
Application adaptability:
Not suitable for high-impact hard ore, but excellent for limestone, coal gangue and other medium-brittle material crushing.
3. Heat Treatment Process Analysis
The complete process adopts Normalizing → Quenching → High-temperature Tempering integrated toughening process.
3.1 Normalizing
Heating temperature: about 900 °C
Function: Refine grain, homogenize casting microstructure, eliminate casting segregation and internal stress, provide good original structure for subsequent quenching.
3.2 Quenching
Austenitizing temperature: 880–900 °C
Process feature: Step heating and staged cooling.
Function: Obtain uniform martensite structure, maximize hardness and wear resistance; staged cooling reduces quenching internal stress and avoids cracking.
3.3 High-temperature Tempering
Tempering temperature: 500–550 °C
Process feature: Slow continuous cooling after heat preservation.
Function:
Eliminate quenching residual stress;
Transform martensite into tempered sorbite;
Match Cr–Mo–Ni alloy system to avoid temper brittleness;
Achieve the best balance of hardness, toughness and wear resistance.
3.4 Process Stability
All batches maintain consistent heating temperature, holding time and cooling curve. The heat treatment furnace has precise temperature control, and the process ex*****on is stable, ensuring consistent microstructure and mechanical properties among different batches.

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29/04/2026

Primary Gyratory Crushers: Concave Installation Fixture
This diagram presents the concave installation carousel system for primary gyratory crushers, a specialized tool designed to streamline and secure the replacement of crusher concave liners.

1. Core Purpose & Functionality
The system is engineered to solve key pain points in traditional concave liner replacement:
Reduces costly downtime by enabling full pre-assembly of concaves outside the crusher housing
Eliminates high-risk, repetitive single-liner lifting and installation inside the crusher
Ensures precise alignment and fit of concave liners to the crusher shell
Provides a safe working platform for technicians during installation tasks

2. System Components & Structure
The fixture is tiered to match the multi-layered concave liner arrangement of primary gyratory crushers:
Component Function
Upper Carousel Dedicated fixture for pre-assembling the upper concave liner. Includes an integrated work platform and safety cover for technician access.
Intermediate Carousel For the intermediate concave liner, with a matching work platform and safety cover.
Lower Carousel For the lower concave liner, with a protective base shield to safeguard crusher bushings and foundation components from impact damage.
Integrated Lifting Lugs Built into each carousel, enabling safe, controlled lifting and transport of pre-assembled concave liner rings.
Customized Fixture Design Each carousel is tailored to the specific diameter of the crusher’s concave liners, ensuring a secure fit during pre-assembly.

3. Key Operational Advantages
1.Modular, Tiered Design: One dedicated carousel per concave layer (upper, intermediate, lower), allowing parallel pre-assembly of multiple liner rings to minimize downtime.
2.Precision Alignment: Concave liners are pre-positioned on the carousel at the exact angle required to match the crusher shell, ensuring accurate, one-time fit during installation.
3.Dual Safety & Utility: The integrated work platforms serve both as support for liner assembly and as safe access for technicians during on-site installation. The safety covers also provide fall protection.
4.Pre-Assembly Outside the Crusher: The entire concave liner ring is assembled on the carousel outside the crusher housing, eliminating the need for repeated confined-space work inside the crusher.
5.Component Protection: The lower fixture includes a dedicated protective shield to safeguard critical crusher components (bushings, base) from accidental damage during liner installation.

4. Typical Installation Workflow
1.Off-Site Pre-Assembly: Technicians mount individual concave liners onto the corresponding carousel outside the crusher, forming a complete, aligned ring.
2.Lift & Position: The fully assembled liner ring, still secured to the carousel, is lifted via the fixture’s lugs and lowered into the crusher housing.
3.Secure & Remove Fixture: The concave liner ring is bolted to the crusher shell, and the carousel fixture is removed, leaving the liner in place.
4.Repeat for Each Layer: The process is repeated for intermediate and upper concaves using their respective carousels.
This method drastically cuts crusher downtime, improves worker safety, and ensures consistent, high-quality liner installation for optimal crusher performance.

29/04/2026

HP400 Cone Crusher Chamber Optimization

1. Core Objective
The goal is to design tailored crushing chamber profiles and liner configurations to solve application-specific challenges (wear, efficiency, feed issues) and improve crusher performance, service life, and operational cost-effectiveness.

2. Case 1: Iron Ore Application (SH-M Special Chamber)
Application Profile
Crusher: HP400 Cone Crusher
Feed Material: Iron Ore
Key Operational Challenges: Low equipment utilization rate,
Severe centralized, uneven wear on liners,Excess fines in the feed material
Proposed Chamber & Liner Solution
Chamber Profile: Custom SH-M special chamber design
Key Design Features:
Corrugated concave liner profile to improve fines passage and enhance particle grip during crushing
Split mantle liner (two-piece construction):
Upper section: Low-alloy steel (optimized for the high-wear central area)
Lower section: High-manganese high-chrome alloy (improved abrasion resistance for the lower crushing zone)
Primary Benefits: Reduced uneven wear, improved material flow, and reduced risk of feed blockages.

3. Case 2: Granite Application (SH-C Special Chamber)
Application Profile
Crusher: HP400 Cone Crusher
Feed Material: Granite
Key Operational Challenges:
Excess fines in the feed material
Regular but high overall wear on liners (due to granite’s high hardness and abrasiveness)
Proposed Chamber & Liner Solution
Chamber Profile: Custom SH-C special chamber design
Key Design Features:
Corrugated mantle and concave liner profiles (improved inter-particle crushing action)
Material upgrade to XT720 alloy for increased wear mass and service life
Optimized critical liner thickness (controlled at 16.83mm / 17.85mm) to maintain effective crushing volume
Primary Benefits: Extended liner wear life, improved crushing efficiency for hard rock, and reduced tonnage cost.

4. Solution Comparison
Aspect Iron Ore (SH-M) Granite (SH-C)
Material Type:
Medium-hard iron ore with high fines High-hardness, abrasive granite
Core Problem Solved Centralized, uneven wear and low utilization High overall wear and efficiency with hard rock
Liner Design
Split mantle (dual alloy) + corrugated concave Full corrugated mantle + concave with XT720 alloy
Key Optimization Focus
Reducing uneven wear and improving fines flow
Maximizing wear life and inter-particle crushing

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29/04/2026

Crushing Chamber Optimization Simulation

Three-stage cone crusher cavity simulation and optimization workflow, widely used in mining and aggregate processing to maximize equipment performance, efficiency, and liner service life.

1. Core Workflow Overview
The simulation process follows a sequential, input-driven methodology:
Parameters → Input all equipment, material, and operational data
Cavity Simulation → Run physics-based modeling of material flow and crushing action
Results Analysis → Evaluate key performance metrics to validate and refine the design

2. Stage 1: Input Parameters
This stage captures all boundary conditions required to build an accurate model of the crusher and its operating environment:
A. Equipment Kinematics
Fulcrum point (pivot location)
Countershaft rotation speed
Eccentric throw and motion profile
B. Operational Settings
Open Side Setting (OSS) / Closed Side Setting (CSS)
Working eccentricity (effective stroke at the crushing zone)
C. Processed Material Properties
Feed gradation (particle size distribution)
Material characteristics: Abrasion Index (Ai), Work Index (Wi)
Bulk density of the feed material
D. Crusher Liners
Profile geometry of both fixed (concave) and moving (mantle) liners.

3. Stage 2: Cavity Simulation
The simulation is built using industry-standard tools and physics principles to replicate real-world crushing behavior:
Tools: AutoCAD (geometric modeling), Mathcad (mathematical calculations), and Office (data processing)
Modeling Principle: Newtonian mechanics (including gravity-driven material flow) to simulate how particles move, compress, and break through each zone of the crusher cavity.

4. Stage 3: Simulation Results & Performance Metrics
The output data quantifies the effectiveness of the liner profile and operating parameters, including:
Capacity and Power Draw: The equipment's throughput and energy consumption
Crushing (Nip) Angle: The angle at which the liner grips particles for efficient compression
Volume per Crushing Zone: Material volume distribution across the feed, crushing, and discharge zones
Choke Point: The narrowest cross-section in the cavity, which dictates maximum throughput and is a critical bottleneck
Resultant Crushing Force: The mechanical load on the liners and main shaft, used to predict wear and structural stress
Reduction Ratio: The ratio of feed size to product size, measuring crushing efficiency
Other secondary performance indicators
Key Purpose & Benefits
This simulation process allows engineers to:
Optimize liner profiles for higher throughput and better product shape
Minimize energy consumption per ton of material
Extend liner service life by reducing uneven wear
Eliminate costly on-site trial-and-error testing.

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29/04/2026

Primary Gyratory Crusher Mantle Types

1. Mantle Construction: 1, 2, or 3-Piece Design
Design Key Characteristics
1-Piece (Solid Mantle) Simplifies installation and improves assembly safety. The primary limitation is manufacturing complexity, with stricter production constraints for large-scale castings.
2/3-Piece (Segmented Mantle) Deployed on large crushers to overcome challenges with casting, transport, and handling extremely heavy single-piece liners. It allows targeted replacement of worn sections, reducing maintenance costs and downtime.

2. Surface Profile: Smooth vs. Corrugated
The selection of profile depends on feed gradation, material hardness, and crushing difficulty:
Smooth: Ideal for feeds with low fines content and coarse, hard-to-crush materials. Minimizes stress concentration and reduces wear on highly abrasive ores.
Corrugated (Ribbed):
Partially Corrugated
Fully Corrugated
Ribbed profiles increase material "bite" points, boosting crushing efficiency for fine-rich feeds and improving control over product particle shape.
RBD (Reduced Bottom Diameter): A modified profile with a smaller lower diameter, which optimizes the crushing chamber geometry to enhance material flow and discharge capacity.

3. Size Series: Under, STD, or OS
These variants are designed to match the wear life of the stationary concave liners:
Under (Undersize): Reduced-diameter variant, used when the concave liner has significant wear to maintain optimal chamber geometry.
STD (Standard): The standard nominal size, intended for use with new or minimally worn concaves.
OS (Oversize): Enlarged-diameter variant, engineered to extend liner life by compensating for progressive wear on the concave over time.
Core Context

Gyratory crusher performance (including capacity, product gradation, and liner wear life) is directly influenced by mantle selection. These three dimensions—construction, profile, and size—enable operators to tailor liners to specific feed conditions, maximize uptime, and lower operational costs.

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29/04/2026

Technical overview of concave liners for primary gyratory crushers, focusing on design configurations, material options, and their application to different wear zones.

1. Design Configurations

Compares two common liner design approaches:

Single-tier / Single-row design

The liner is divided into multiple narrow horizontal segments, each made of several individual parts. This allows targeted replacement of worn parts but requires more time for installation and maintenance.

Dual-tier / Double-row design

The liner uses fewer, larger horizontal segments, reducing the total number of individual parts. The core advantage is fewer components required for assembly, which speeds up installation, cuts maintenance downtime, and reduces potential leak points.

The top diagrams illustrate the two configurations:

Left: Single-tier design, with many small, stacked segments.

Right: Dual-tier design, with fewer, larger segments.

2. Material Options

Three common alloy materials are presented, each suited to different operating conditions:

Material Key Characteristics

Manganese Steel Excellent impact resistance, ideal for handling large, coarse feed material. Less wear-resistant than harder alloys.

Low-Alloy Steel Balanced performance, offering good impact resistance and moderate abrasion resistance. A versatile general-purpose option.

White Iron (High-Chrome Iron) Extremely high hardness and abrasion resistance. The best choice for high-wear zones but is brittle and not suitable for high-impact areas.

Performance ranking by property:

Impact resistance (against tramp metal/non-crushable objects): Manganese Steel > Low-Alloy Steel > White Iron

Abrasion resistance (service life): White Iron > Low-Alloy Steel > Manganese Steel

3. Wear Zone Application

The bottom diagram illustrates how wear patterns vary along the liner height, which dictates material selection:

Upper Concaves: Experience the highest impact forces from incoming large rocks. Manganese Steel is typically used here for its superior impact toughness.

Intermediate Concaves: Subject to moderate impact and abrasion. Low-Alloy Steel is often chosen here as a balanced solution.

Lower Concaves: See the highest levels of abrasion as material is crushed to smaller sizes. White Iron or high-chrome alloys are preferred here for maximum wear life.

💡 Key Takeaways

The optimal liner solution depends on balancing three critical factors:

Maintenance Efficiency: Dual-tier designs reduce downtime by using fewer parts.

Wear vs. Impact: Material selection must match the specific zone's primary stress—impact at the top, abrasion at the bottom.

Total Cost of Ownership: While harder alloys like white iron cost more upfront, their longer life can reduce total operating costs in high-wear applications.

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28/04/2026

XT-series manganese alloys, a tailored range of wear-resistant materials designed to match different crushing applications. Below is a structured analysis:

1. Core Purpose & Design Philosophy
XT series to eliminate "one-size-fits-all" wear parts. Each alloy balances structural toughness (to resist shock and fatigue) and abrasion resistance (to withstand material wear), with compositions optimized for specific crusher types, equipment sizes, and operating conditions.

2. Alloy Breakdown & Target Applications
XT510 12% Mn Standard cones and primary gyratory crushers The baseline manganese alloy for general-purpose crushing
XT520 12% Mn + Mo Large cones; applications requiring long service life and fatigue resistance Molybdenum (Mo) boosts fatigue strength, preventing crack formation in high-stress environments
XT525 12% Mn + Low-Carbon Mo Ultra-large, heavy castings (e.g., MP2500 cone crushers) Low-carbon formulation enhances structural stability for oversized components
XT610 12% Mn + Cr Specialized, select applications Chromium (Cr) refines grain structure for improved wear resistance in niche use cases
XT710 18% Mn + Cr Standard cones and jaw crushers The industry workhorse, balancing toughness and wear resistance for general aggregates
XT720 21% Mn + Cr High-wear cones (e.g.HP500 and smaller) Higher manganese + chromium grades for aggressive, high-throughput HP-series crushing
XT750 21% Mn High-wear large cones and primary gyratories Elevated manganese for enhanced work-hardening in severe abrasion conditions
XT770 24% Mn + Mo Extreme high-wear large cones and primary gyratories The top-tier grade, combining ultra-high manganese with molybdenum for ultimate toughness + wear resistance

3. Two Key Performance Categories
The series is split into two core performance families:
High Structural Toughness (XT500/600 Series)
Prioritizes impact resistance and crack prevention, making it ideal for heavy, large-scale equipment (e.g., primary gyratories, oversized cones) where shock loads and fatigue are the primary failure risks.
High Abrasion Resistance (XT700 Series)
Optimized for wear resistance in high-throughput, high-abrasion applications (e.g., hard rock crushing). Higher manganese and chromium levels improve work-hardening, so the parts actually get harder with use.

4. Alloy Element Roles
Manganese (Mn): The base element of austenitic manganese steel. It enables work-hardening under impact, which is the primary mechanism for wear resistance in crushing parts.
Molybdenum (Mo): Improves hardenability and fatigue strength, reducing the risk of crack propagation in high-stress, long-service-life applications.
Chromium (Cr): Refines the steel’s grain structure, boosting hardness and abrasion resistance while maintaining good toughness.
Low Carbon: In XT525, low carbon minimizes the risk of brittle phases forming in extremely large, slow-cooled castings, ensuring structural integrity.

5. Practical Implications for Operations
Cost Efficiency: Matching the right XT grade to your specific application avoids over-specifying (and overpaying) for premium alloys in mild conditions, while preventing premature wear from under-specifying in harsh environments.
Equipment Compatibility: Grades like XT525 and XT720 are purpose-built for flagship crushers, ensuring optimal fit and performance with the equipment’s design parameters.
Application Tailoring: From soft aggregates (XT710) to extreme hard rock (XT770), the series covers the full spectrum of crushing needs, reducing downtime and extending wear part service life.

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28/04/2026

Three primary modes of abrasive wear that affect crushing and mining equipment, with clear differences in loading, material removal, and surface hardening behavior:

1. Gouging Abrasive Wear

Mechanism: Occurs under high-impact, high-compressive loads, such as in jaw crusher liners or primary impact crushers.

Key behavior: The ore acts like a "chisel," gouging out large chunks of metal from the component surface.

Hardening effect: The repeated impact and deformation causes severe work hardening of the material surface. This is why manganese steel is commonly used for these applications—it becomes harder in service to resist further gouging.

2. Sliding/Scouring Abrasive Wear

Mechanism: Occurs under negligible compressive loads, such as material sliding down chutes or along conveyor liners.

Key behavior: Particles slide or roll across the surface, removing only very small metal particles, like sandpaper.

Hardening effect: There is almost no work hardening, as there is insufficient force to plastically deform the metal surface. High hardness materials (e.g., high-chrome iron, ceramics) are preferred here for scratch resistance.

3. Crushing/High-Stress Abrasive Wear

Mechanism: Occurs under concentrated, high compressive loads, such as in cone crusher liners or grinding rolls.

Key behavior: Ore particles are crushed between two metal surfaces, which creates indentations and removes small metal particles from repeated high-pressure contact.

Hardening effect: Work hardening is low to moderate, as the loading is primarily compressive rather than impactive. Materials with high compressive strength and toughness are ideal here.

3. Practical Engineering Takeaways

The purpose of classifying these wear modes is to match the right wear material to the right application:

Use work-hardening alloys (e.g., Hadfield manganese steel) for gouging wear applications.

Use high-hardness, non-work-hardening materials (e.g., high-chrome cast iron, ceramics) for sliding/scouring wear.

Use high-strength, compression-resistant alloys for crushing/high-stress wear.

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28/04/2026

Stop Crushing Your Budget. Start Crushing Rock.

Let’s face it—downtime is lost profit. And cheap wear parts? They’ll bleed you dry with constant replacements, unexpected shutdowns, and subpar performance.

Upgrade to Bogvik™—the premium crusher wear parts and spares engineered for the toughest American jobsites. Built from high-grade alloys and precision-cast to exceed OEM specs, our liners, mantles, jaws, and blow bars deliver:

✅ Up to 40% longer wear life – Fewer change-outs, more uptime.
✅ Perfect fit, zero drama – Bolt-on ready for most major crusher brands.
✅ Extreme impact resistance – From granite to recycled asphalt, we take the hit so you don't.

Don’t let “bargain” parts turn your production line into a money pit. Get heavy-duty reliability that keeps your crusher crushing and your bottom line healthy.

Ask for Bogvik. Built to last. Priced to make sense.

👉 Call or visit us today –[email protected]

Shanghai Bogvik Wear Material Co., ltd

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