Jaw Crushers
Negative Suspension Laboratory Jaw Crusher Sealed Dust Collection Sample Preparation Crusher
Item Number: PP-JA21
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Product Overview
This negative-suspension laboratory jaw crusher is an advanced sample preparation unit specifically engineered for primary, medium, and fine crushing of hard to medium-hard minerals, ores, coal, and raw materials. Built around a completely enclosed operating chamber equipped with a specialized dust extraction interface, this system effectively isolates hazardous dust particulates during reduction processes, maintaining a clean laboratory workspace while protecting operational personnel from airborne contaminants.
Designed to handle materials with a compressive strength of up to 24 kg/cm², the equipment provides high reduction ratios, uniform output particle size distributions, and infinitely adjustable discharge gaps. This makes it an indispensable asset across quality control, chemical analysis, geological survey, metallurgical testing, power generation, building material verification, and advanced university research laboratories requiring dependable batch-to-batch sample preparation.
Constructed with a heavy-duty integral steel body, precision-machined eccentric shaft drives, and sacrificial shear-pin safety mechanisms, this unit delivers exceptional mechanical stability under continuous operational stresses. Its rugged engineering guarantees long-term durability and operational consistency, positioning it as a trusted benchmark for high-throughput laboratory crushing applications.
Key Features
- Sealed Housing with Dust Extraction Port: Features a fully enclosed mechanical casing equipped with a dedicated negative-pressure dust extraction interface that actively evacuates fine airborne particulates, preventing workplace contamination and safeguarding operator health.
- Negative-Suspension Kinematic Architecture: Built with a single-piece cast movable jaw suspended from precision rolling bearings on the upper eccentric shaft, ensuring optimized motion trajectories for maximum jaw leverage, high reduction ratios, and uniform product sizing.
- Sacrificial Shear-Pin Overload Protection: Incorporates an engineered rivet-pin shear link within the movable jaw support mechanism that immediately breaks upon encountering uncrushable tramp material, shielding the eccentric shaft, motor, and structural frame from catastrophic failure.
- External Discharge Gap Adjustment: Outfitted with an ergonomically located left-side adjustment handle that allows operators to seamlessly modify the discharge opening gap to dial in precise target particle sizes and compensate for natural jaw plate wear over extended use.
- Integral Steel Frame with Renewable Wear Plates: Built on a solid structural steel base with replaceable side protective plates lining the crushing chamber walls, effectively preventing structural erosion caused by high-abrasion ores and rocks.
- High-Momentum Dual Flywheel Drive System: Powered by an industrial electric motor driving an eccentric shaft balanced by twin flywheels, storing rotational kinetic energy to smooth out peak load surges during intense crushing cycles.
- Wear-Resistant Alloy Jaw Plate Assembly: Features rugged fixed and movable jaw plates optimized for crushing high-hardness mineral specimens while retaining structural geometry over prolonged service lifespans.
- Vibration-Isolating Motor Slide Base: Mounts the drive motor on precision-machined slide rails with lock-bolt adjustments, simplifying belt tension tuning while minimizing operational vibration transfer throughout the assembly.
Applications
| Application | Description | Key Benefit |
|---|---|---|
| Mining & Geology Exploration | Crushing raw mineral ores, drill cores, and rock specimens down to uniform fine powders for XRF, ICP, and fire assay chemical analysis. | High reduction ratio and zero cross-contamination preserve analytical integrity. |
| Coal & Power Generation Quality Control | Processing bulk coal, coke, and slag specimens to verify calorific value, moisture content, and ash percentage under strict laboratory standards. | Dust-free operation maintains clean air standards in fuel testing facilities. |
| Metallurgical & Slag Material Analysis | Reducing tough metallurgical slag, sintered iron ores, and metallic oxides prior to secondary milling and extraction testing. | Shear-pin protection prevents machine damage from uncrushable metallic tramp material. |
| Building Materials & Aggregate Sizing | Crushing limestone, clinker, concrete cores, and ceramic raw materials to assess mechanical strength and chemical composition. | Easily adjustable discharge gap provides precise particle size distribution control. |
| Chemical Processing & Industrial Minerals | Preparing batch samples of industrial minerals, synthetic compounds, and chemical catalysts for batch quality testing. | Enclosed negative-pressure housing prevents toxic or irritating airborne dust leakage. |
| Academic & Industrial R&D Testing | Utilizing low-to-high capacity crushing variants for material science experimentation, process scaling, and geotechnical research. | Flexible throughput configurations suit both benchtop testing and high-volume sample preparation. |
Technical Specifications
Product Variant Specifications
| Model Identifier | Feed Opening Dimensions (mm) | Maximum Feed Size (mm) | Output Size Range (mm) | Production Throughput Capacity (kg/h) | Main Shaft Speed (rpm) |
|---|---|---|---|---|---|
| PP-JA21-100x60 | 100 × 60 | 50 | 0.1 – 15 | 45 – 550 | 600 |
| PP-JA21-100x125 | 100 × 125 | 100 | 2 – 35 | 300 – 2000 | 375 |
| PP-JA21-150x125 | 50 × 125 | 120 | 4 – 45 | 500 – 3000 | 375 |
General Construction & Operational Parameters
| Parameter | Specification Details |
|---|---|
| Base Model Series | PP-JA21 Series (Sealed Negative-Suspension Jaw Crusher) |
| Enclosure Architecture | Fully Sealed Casing with Dedicated Dust Extraction Port |
| Mechanism Type | Negative-Suspension Upper Eccentric Shaft with Precision Bearings |
| Applicable Compressive Strength | ≤ 24 kg/cm² |
| Structural Frame | Integral Heavy-Duty Steel Housing with Side Wear Plates |
| Movable Jaw Structure | One-Piece Alloy Casting with Front-Mounted Jaw Plate |
| Safety System | Rivet Pin Shear Link (Instant Overload Mechanical Protection) |
| Discharge Regulation | Manual Adjustment Handle Located on Left Frame Wall |
| Drive System | V-Belt Pulley Transmission with Dual Eccentric Flywheels |
| Motor Base Configuration | Slide Rail Mounting with Adjustable Bolt Lock System |
| Output Uniformity | High Reduction Ratio with Adjustable Fine Sizing |
| Standard Compliance | Industrial Laboratory Sample Preparation Standards |
Why Choose This Product
- Superior Environmental & Workplace Safety: Fully enclosed construction integrated with an active dust suction port guarantees a clean laboratory environment, meeting strict occupational health guidelines.
- Fail-Safe Mechanical Overload Protection: Sacrificial shear-pin design acts as an instantaneous safety mechanism, preventing catastrophic structural damage when uncrushable materials enter the crushing cavity.
- Robust Heavy-Duty Engineering: Fabricated with an integral steel body, one-piece cast movable jaw, and high-impact wear plates, ensuring exceptional longevity and structural rigidity under demanding operational cycles.
- Flexible Particle Sizing Control: Intuitive external gap adjustment allows quick tuning of discharge sizes and effortless compensation for jaw plate wear without requiring disassembly.
- Proven Versatility Across Target Industries: From small batch bench-scale testing to high-throughput sample processing up to 3000 kg/h, the PP-JA21 series offers tailored configurations for every material science workflow.
Contact our technical engineering team today to request a quote or discuss customized sample preparation solutions tailored to your laboratory requirements.
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