SP PEX Type Jaw Crusher with Negative-Suspension Design High-Manganese Steel Jaw Plates and Adjustable Discharge Size for Laboratory Rock Crushing

Negative-Suspension Fine Crushing Series

The SP / PEX series jaw crusher adopts a negative-suspension (inverted-hanging) design, where the suspension point of the movable jaw is positioned below the eccentric shaft centerline. This optimized kinematic geometry delivers a larger horizontal stroke at the discharge end, higher crushing ratio, and more uniform product size — making it the preferred fine-crushing jaw crusher for hard and medium-hard ores. It is widely applied in geology, metallurgy, coal, building materials, chemical engineering, nuclear industry and other fields for laboratory sample preparation, pilot-scale testing, and small-to-medium production lines.

The motor drives the eccentric shaft via V-belt, making the movable jaw reciprocate periodically. In the negative-suspension configuration, the movable jaw suspension point lies below the eccentric shaft, which increases the horizontal stroke at the discharge end — promoting discharge, reducing clogging, and producing a more uniform product size. Material is crushed by compression and splitting in the chamber; the discharge setting is adjustable to control product size.

SP 60*100 and SP 100*100 are compact benchtop units designed for laboratory sample preparation. Small footprint, low noise, simple operation — ideal for geological exploration, assay labs, and R&D facilities where feed quantities are limited and consistent particle size output is required.

The PEX series spans from benchtop units (PEX 100*100, 100*125, 125*125) through pilot-scale (PEX 150*750) to small industrial models (PEX 400*600, 350*750). The negative-suspension design excels at secondary/fine crushing, delivering tight particle-size control and high throughput in a compact envelope.

• Negative-suspension kinematics — larger discharge-end stroke, higher crushing ratio, uniform product size
• Deep crushing chamber, no dead zone — large feed, no clogging
• FEA-optimized frame — high strength, long service life
• Centralized lubrication system for easy maintenance
• Hydraulic / wedge discharge adjustment — labor-saving
• High-manganese steel jaw plates — wear & impact resistant
• Low energy, low noise, controllable dust — suitable for lab and urban environments

• Pre-start check: confirm bolts tightened, lubrication in place, motor rotation correct, chamber clear
• Start-up: jog test → confirm rotation → run empty → then feed evenly
• Operation monitoring: watch current, bearing temperature, abnormal noise, product size; no over-speed/over-size feed
• Feeding: uniform and continuous, avoid segregation, control max feed size ≤ specified
• Shutdown: stop feed → empty chamber → then stop machine
• Safety: never feed iron or non-crushable objects; do not open inspection door or adjust mechanism while running
• Storage: for long shut-down, drain lubricant and apply anti-rust treatment

Q1: What materials can the SP/PEX Jaw Crusher process?
It is suitable for crushing hard and medium-hard ores and other brittle materials for laboratory testing and mineral processing.

Q2: Is it suitable for laboratory use?
Yes. The SP series is designed for laboratory sample preparation and fine crushing, while the PEX series is suitable for laboratory, pilot-scale, and small-to-medium crushing applications.

Q3: How do I choose the right model?
Model selection depends on feed size, required discharge size, processing capacity, and material characteristics. Y&X can recommend a suitable model based on your requirements.

Q4: Can the discharge size be adjusted?
Yes. The discharge opening can be adjusted according to the model and required particle size.

Y&X Beijing Technology Co., Ltd. was established in 2014 and is located in Beijing, the capital of China. Our company has become a professional enterprise integrating scientific research, design, new product development, production and manufacturing with strong technical force. As a family group, the mission from the beginning was to expand overseas markets and provide one-stop professional solutions for overseas mining companies.

The company specializes in the research and supply of mineral processing reagents and equipment, including mineral processing equipment and laboratory mineral processing equipment; products are widely used in metallurgy, geology, petroleum, coal, chemicals, building materials, environmental protection, non-ferrous and non-metallic mines, research departments in industries such as dressing plants, mineral processing laboratories in colleges and universities.

Laboratory equipment for mineral processing: mainly include crushing, grinding, screening, grading, magnetic separation, flotation, assay, sample preparation, leaching, analysis-electrolysis, shaking table, chute and other laboratory equipment and gravity separation equipment.

Our products sell well in Russia, Mongolia, Chile, Australia, Zimbabwe, Thailand, Laos, Indonesia, Tanzania, Nigeria and other countries and regions.