250x400mm Jaw Crusher Medium Crushing Equipment for Mining Mineral Sample Preparation

Product Overview

This laboratory jaw crusher operates on the principle of compressive force, where a fixed jaw and a moving jaw create a V-shaped crushing cavity to break materials through cyclic squeezing motion. Designed specifically for medium-duty reduction of hard, brittle samples such as ores, minerals, rocks, and industrial chemicals, it handles feed materials with compressive strengths up to 320 MPa with ease. The unit serves as a primary stage crusher in sample preparation workflows, transforming large chunks into manageable, uniform particles for further grinding, milling, or direct analysis.

Its deep, symmetrical crushing chamber eliminates stagnant zones, ensuring smooth material flow and preventing blockages even when feeding irregularly shaped stones. With a large feed opening of 250×400 mm and a high crushing ratio, the equipment processes sizeable lumps in a single pass, reducing the need for multiple crushing stages. A simple gasket mechanism allows the operator to adjust the discharge gap from coarse (<50 mm) to fine without interrupting operation, making it ideal for testing laboratories that require rapid changeovers between different product specifications.

Constructed around a heavy-gauge welded steel frame and driven by an 11 kW high-efficiency motor, this crusher is built for longevity in demanding environments. Centralized grease lubrication, sealed bearings, and easily replaceable manganese steel jaw plates ensure minimal maintenance and extended service life. Energy efficiency is outstanding, with the system consuming up to 30% less power than comparable machines, while noise and dust emissions are kept to a minimum, complying with occupational health standards. These attributes make it a trusted workhorse in research institutes, commercial labs, and process control facilities worldwide.

Key Features

• Deep, Symmetrical Crushing Chamber: The chamber geometry is optimized to eliminate dead zones and promote uniform material flow, which maximizes the effective crushing area and boosts production capacity. This design also reduces the risk of material bridging, ensuring consistent feed acceptance.
• High Reduction Ratio: A large stroke and optimized jaw angle produce a crushing ratio that far exceeds typical single-toggle crushers of this size, enabling the unit to reduce large feed to a controlled size in one pass. The result is a more homogeneous output with minimal oversized particles or slivers.
• Adjustable Discharge Width: A straightforward gasket-type adjustment system allows the operator to set the closed side setting precisely without tools, from 50 mm down to finer settings. This flexibility supports both coarse pre-crushing and finer preparation, adapting to varying downstream process needs.
• Safe and Reliable Lubrication: The centralized lubrication block features protected grease nipples and sealed passages, shielding critical bearings from dust and moisture ingress. Regular greasing is quick and clean, dramatically extending bearing life and reducing unforeseen breakdowns.
• Energy-Saving Motor and Flywheel Design: The marriage of a high-torque 11 kW motor with a heavy-duty flywheel stores kinetic energy and releases it during the working stroke, smoothing power demand and cutting electrical consumption. Independent tests show up to 30% energy reduction versus older jaw crusher models.
• Low Environmental Impact: Engineered to operate at low noise levels, the equipment integrates sound-damping panels and a rigid enclosure that absorbs vibration. Combined with effective dust seals around the crushing chamber, the unit maintains a clean and quiet laboratory atmosphere, meeting strict EHS guidelines.
• Durable Construction with Replaceable Wear Parts: The main frame is welded from premium structural steel and annealed to remove residual stresses. Jaw plates, cheek plates, and toggle plate are manufactured from abrasion-resistant manganese steel and are easily replaceable, ensuring the crusher’s structural integrity over many years of use.
• Wide Material Applicability: The machine processes a diverse array of materials—from hard quartzite and granite to medium-strength limestone and chemical compounds—thanks to its robust power train and high torque. Even materials with higher silica content are handled efficiently, making it a versatile asset in multi-purpose labs.
• Simple Maintenance and Parts Accessibility: Designed with maintenance in mind, the unit features hinged access doors and tool-keeper storage, enabling fast jaw plate changes and chamber cleaning. Downtime is minimized, and the availability of off-the-shelf spare parts keeps operating costs predictable.
• Compact, Lab-Friendly Footprint: Despite its industrial strength, the crusher occupies a modest floor area (1430×1310 mm) and is designed for easy integration into existing workflows. It can be mounted on a common base frame with motor pulley and belt guard, simplifying installation in crowded labs.

Applications

Technical Specifications

Why Choose This Product

• Built for Demanding, Continuous Operation: Thick steel plate construction and stress-relieved welding ensure this crusher withstands the rigors of daily heavy use without deformation. Proven in mining and aggregate labs worldwide, its reliability is backed by a track record of minimal downtime and consistent output.
• Precision Engineering for Accurate Sample Preparation: Every component—from the aligned jaw plates to the precision-machined toggle block—is manufactured to tight tolerances, guaranteeing repeatable performance. The gasket adjustment system offers high-resolution control of particle size, critical for analytical and quality-control processes.
• Ultra-Low Operational Costs: Thanks to an energy-efficient drive, minimal lubricant consumption, and the use of long-wear manganese steel liners, the total cost of ownership is significantly reduced. Users report maintenance intervals that are two to three times longer than with competitor models.
• Safety and Environmental Compliance: Fully enclosed moving parts, sealed bearings, and dust-tight inspection hatches meet the highest industrial safety standards. Noise emissions are kept below 85 dB(A), ensuring a comfortable working environment without special enclosures.
• Dedicated Support from Sample Preparation Experts: When you invest in this equipment, you gain access to our global team of application engineers. We assist with installation, training, and ongoing technical support, and can customize the crusher to your specific voltage, feed size, or automation requirements. Contact us to discuss your project today.

Request a proposal or technical consultation to see how this robust jaw crusher can elevate your sample preparation workflow.