Products Description

Developed to meet the high-intensity, high-efficiency cutting needs of large mining equipment semi-coal rock and full rock formations, this series provides solid technical support for large-scale, intensive and safe mining operations.

Basic Characteristics & Manufacturing Standards

In essence, the U170 Series belongs to super heavy-duty conical picks, a high-end cutting tool type characterized by a thickened and reinforced body structure, standardized shank design, and enhanced tooth tip performance. Its specially optimized conical tooth tip geometry improves rock-breaking penetration and reduces cutting resistance, effectively reducing energy consumption even when cutting high-hardness rock and coal-rock composite layers. The series is equipped with high-precision self-rotating wear-balancing technology, which ensures that the tooth tip and body maintain uniform wear under long-term high-load and high-intensity operations, avoiding premature failure due to local excessive wear and significantly extending the overall service life. For the pick body, high-quality 42CrMo alloy steel is selected, and precision cold forging, quenching and tempering integrated processes are adopted to ensure uniform internal structure and fine grains. The final product achieves a hardness of 45-49 HRC and an impact toughness of not less than 55 J/cm², fully meeting the stringent mechanical performance requirements for super heavy-duty shearer picks in high-intensity mining operations.

Application Scenarios

The U170 Series is mainly applied in mining scenarios equipped with high-power shearers and heavy-duty mining machinery, covering large-scale underground thick hard coal seam mining, open-pit hard rock stripping operations, coal-rock tunnel excavation and large-scale continuous mining projects. Its application scope focuses on large-scale mining projects with high intensity, high efficiency requirements, and harsh working conditions such as high hardness, high abrasiveness and complex geological structures, which is highly consistent with its super heavy-duty performance positioning.

In large-scale underground thick hard coal seam mining, the U170 Series is particularly suitable for high-power shearer equipment. Its reinforced body structure can withstand long-term high-intensity cutting operations, and the stable installation performance ensures continuous and efficient operation of the shearer drum.

In open-pit hard rock stripping operations, the series can efficiently cut hard rock formations, and its excellent wear resistance and impact resistance can minimize equipment downtime caused by frequent pick replacement, improving overall project progress.

In coal-rock tunnel excavation, the U170 Series shows excellent adaptability to alternating coal and rock layers; the uniform wear performance ensures stable cutting efficiency, reduces equipment vibration caused by uneven cutting, and effectively protects key components such as shearer drums and transmission systems.

Practical Application Case

A practical application case in a large open-pit coal mine in Inner Mongolia, China, fully verifies the excellent performance of the U170 Series. This mine mainly conducts hard rock stripping and coal seam mining operations, and the original picks had problems such as rapid wear, frequent tip detachment and short service life, which seriously restricted mining efficiency and increased operational and maintenance costs. After switching to U170 Series picks, the average service life of a single pick was extended by 80%, pick consumption per unit output was reduced by 45%, mining efficiency was increased by 28%, and downtime caused by pick replacement was reduced by nearly 70%, significantly lowering the comprehensive operational costs of the mine. This case fully demonstrates the strong adaptability of the U170 Series to extreme harsh working conditions and its remarkable economic and social benefits for large-scale mining enterprises.

Core Parameter Comparison Table

Parameter Dimension	U80 Series Shearer Picks	U90 Series Shearer Picks	U170 Series Shearer Picks
Target Equipment Power	Medium and small-power shearers	Medium and high-power shearers	High-power shearers, heavy-duty mining machinery
Core Product Category	Conical picks (standard type)	Heavy-duty conical picks	Super heavy-duty conical picks
Body Material	42CrMo alloy steel	35CrMnSi alloy steel (high-strength)	42CrMo alloy steel (precision cold forging)
Hardness	40-44 HRC	42-46 HRC	45-49 HRC
Impact Toughness	Not less than 49 J/cm²	Not less than 52 J/cm²	Not less than 55 J/cm²
Core Models	U82, U84, U85	U92, U94, U95
Adaptable Seam Hardness	Soft to medium-hard coal seams (with small gangue)	Soft to hard coal seams, semi-coal rock layers (with medium-large gangue)	Hard coal seams, semi-coal rock, full rock, reinforced hard rock (high abrasiveness)
High-Temperature Resistance (Friction)	Up to 600-800℃	Up to 700-900℃	Up to 800-1000℃
Wear-Resistant Enhancement	Laser-cladded wear-resistant layer (U85 model)	Plasma-sprayed wear-resistant coating (U95 model); cobalt-added alloy tip (U94 model)	Micro-arc plasma precision cladding layer (ceramic particle added); high-purity tungsten-cobalt alloy tip
Key Application Scenarios	Underground thin/medium-thick coal seams, open-pit auxiliary operations, small-medium scale continuous mining	Underground thick coal seams, open-pit coal-rock stripping, semi-coal rock tunnel excavation, large-medium scale mining	Large-scale underground thick hard coal seams, open-pit hard rock stripping, coal-rock tunnel excavation, large-scale continuous mining
Typical Performance Advantages	Balanced wear resistance and toughness, easy installation, cost-effective	High impact resistance, heavy-duty durability, long service life	Super wear resistance, strong impact load-bearing capacity, reliable in extreme conditions