EP Series Small Jaw Crusher for Laboratory Sample Preparation

Product Overview

This laboratory jaw crusher is engineered for medium and fine crushing of brittle, medium-hard materials with compressive strengths up to 100 MPa. Its curved extrusion crushing mechanism—a design proven over decades in mining and processing—applies gradually increasing pressure to reduce samples to the required particle size with minimal fines generation. The crushed product’s uniformity makes it ideal for subsequent grinding, blending, or direct analytical procedures in quality control, research, and production support laboratories.

The equipment excels in processing a wide range of materials including coal, coke, limestone, pyrite, ore, slag, and similar substances. With feed sizes up to 125 mm (depending on the model), it transforms oversized chunks into manageable, homogenous powders or grits, saving time and labor in sample preparation chains. Its benchtop-friendly dimensions allow installation in even space-constrained labs without sacrificing functional capacity.

Designed with the operator in mind, this unit features a fully enclosed crushing chamber that suppresses dust leakage, maintaining a clean laboratory atmosphere. The low-noise operation, typically below 75 dB, reduces fatigue and enables comfortable use in multi‑user environments. Simple mechanical construction minimizes moving parts, ensuring both reliability and ease of maintenance—critically important for labs with high sample throughput. A selection of wear‑resistant jaw plate materials further extends the crusher’s versatility, making it a long‑term investment for any material testing facility.

Key Features

• Curved Extrusion Crushing: The heart of the crusher is a stationary curved jaw paired with a moving jaw, driven by an eccentric shaft. This configuration creates a progressive nip angle that grips material firmly and fractures it through compression rather than impact. The result is a narrower particle size distribution and less dust production compared to traditional straight-jaw crushers. Wear on the jaw plates is evenly distributed, prolonging service life.
• Dust‑Free Sealed Construction: A key advantage in modern laboratories is the fully enclosed crushing cavity, sealed with replaceable gaskets that prevent fine particles from escaping during operation. An optional dust collection port can be connected to a central vacuum system for additional containment. This design meets the stringent cleanliness requirements of analytical labs and protects sensitive instruments from contamination.
• Low‑Noise Operation: Precision machining of all moving components, combined with rigid mounting and optimized counterweights, keeps operational noise below 75 dB(A)—comparable to normal conversation. This allows the crusher to be used in shared lab spaces without requiring special acoustic enclosures, improving operator comfort and compliance with occupational health regulations.
• Adjustable Output Size: A simple, lockable wedge mechanism enables stepless adjustment of the discharge opening, controlling final particle size from fine to coarse. The gap-setting indicator ensures repeatability, while the adjustment process requires only basic hand tools. This flexibility supports multiple analytical methods—from XRF pellet preparation requiring fine powders to larger grain sizes needed for ore petrography.
• Interchangeable Jaw Plates: Recognizing that laboratories test a variety of materials, the crusher accepts three different jaw plate materials: white cast iron for general use (soft to medium-hard materials), high manganese steel for tougher feeds, and wear‑resistant alloy steel for highly abrasive samples. Changing jaw plates is a simple process that can be completed in minutes, dramatically reducing the need for multiple dedicated crushers.
• Easy Access and Cleaning: To minimize cross‑contamination, the crushing chamber can be fully accessed by lifting the safety cover. All internal surfaces exposed to the sample are smooth and readily accessible for brushing or vacuuming. The design also permits quick removal of the fixed jaw for more thorough cleaning or autoclaving, if required for trace analysis.
• Robust Drive and Overload Protection: An electric motor transmits power through V‑belts to a heavy‑duty flywheel, ensuring consistent torque even under intermittent loads. A shear pin incorporated in the flywheel hub acts as a sacrificial safety device—should an uncrushable object enter the chamber, the pin shears to prevent damage to the crusher’s internal components. Replacing the pin takes only seconds, minimizing downtime.
• Durable Frame Construction: The mainframe is cast from high‑grade gray iron or fabricated from stress‑relieved steel plate, providing a stable, vibration‑resistant foundation. The oversized bearings and robust eccentric shaft are designed for continuous duty, ensuring the crusher maintains alignment and crushing efficiency over years of heavy use. All external surfaces are finished with a chemical‑resistant coating for durability.

Applications

Technical Specifications

The PP-JA01 series compact jaw crushers are designed for laboratory-scale sample reduction. The series includes four factory‑configured models covering feed opening sizes from 60×100 mm to 150×250 mm, allowing selection based on throughput and sample size requirements. All models share identical crushing mechanics, safety features, and jaw plate material options, ensuring consistent performance across the product line.

Additional Specifications

Why Choose This Product

• Industry‑Proven Reliability: Our jaw crushers have been deployed in laboratories worldwide for decades, consistently delivering precise particle size reduction. The robust construction, using high‑grade castings and precision‑machined components, ensures that even under continuous daily operation, the crusher maintains alignment and performance. Many units remain in service for over 15 years, attesting to the durability of the design.
• Material‑Specific Customization: Unlike generic crushers, this system offers a choice of three jaw plate materials to match specific feed material abrasiveness and hardness. Whether you are crushing soft coal or abrasive ores, you can optimize jaw life and output quality. Additionally, the wedge adjustment allows precise output control, making it adaptable to evolving laboratory requirements.
• Operator Safety and Comfort: The fully enclosed crushing process eliminates dust escape, protecting personnel from respiratory hazards and keeping the lab clean. Low‑noise operation reduces auditory fatigue, while the shear pin overload protection prevents mechanical damage and enhances safety. These features help laboratories comply with ISO 45001 and other occupational health standards.
• Low Total Cost of Ownership: Simple mechanical design reduces the number of wearing parts and simplifies maintenance. Jaw plates can be replaced by lab staff in minutes, and the robust motor and drive system minimize energy consumption and unplanned downtime. Over the life of the equipment, these efficiencies translate into significant savings compared to more complex, maintenance‑intensive alternatives.
• Comprehensive After‑Sales Support: We provide full technical support from selection guidance and commissioning to ongoing maintenance advice. Our network of service engineers can assist with remote troubleshooting or on‑site visits. Spare parts are kept in stock for rapid dispatch, ensuring that your sample preparation workflow remains uninterrupted.

Contact us today to discuss your specific crushing needs, request a sample test, or obtain a tailored quotation for the PP-JA01 series laboratory jaw crusher.