U90 Shearer Picks

As key wear-resistant components in coal mining and rock cutting operations, shearer picks play a decisive role in ensuring equipment continuous operation, reducing energy consumption, and safeguarding operational safety.

Essentially, the U90 Series is categorized as heavy-duty conical picks, a core type of mining cutting tool distinguished by a thickened body and standardized shank structure. Its optimized conical tooth tip design enhances rock-breaking penetration while reducing cutting resistance, effectively lowering energy consumption during the cutting of hard coal and rock. The series is equipped with upgraded self-rotating wear-balancing technology, which enables the tooth tip and body to wear evenly under high-load conditions, avoiding premature failure caused by local overwear and greatly prolonging the service cycle. For the pick body, high-strength 35CrMnSi alloy steel is adopted, undergoing precision forging, quenching, and tempering processes. The final product achieves a hardness of 42-46 HRC and an impact toughness of not less than 52 J/cm², fully meeting the strict mechanical performance standards for shearer picks in heavy-duty mining operations.

The U90 Series covers a complete range of models tailored to different rock hardness levels and mining equipment configurations. Core models include U92, U94, and U95, each of which can be customized into multiple specifications (such as different tungsten carbide tip grades, shank diameters, and length dimensions) according to actual project needs. These models share the same heavy-duty design concept but have targeted adjustments in structural strength and performance parameters to adapt to diverse coal-rock composite working conditions.

The U92 is the entry-level heavy-duty model in the series, featuring an excellent balance between penetration and toughness. It is mainly applicable to soft to medium-hard coal seams (including bituminous coal) and is widely used in medium-scale coal mines with moderate geological complexity.

The U94 is optimized for medium-hard coal seams mixed with medium-sized gangue; its alloy tip adopts a cobalt-added formula, which enhances impact resistance while maintaining high wear resistance, effectively reducing tip chipping and shedding caused by gangue impact.

The U95 is a high-performance model designed for hard coal seams and semi-coal rock layers; it is equipped with a thickened tungsten carbide tip (with a cobalt content of up to 8-9%) and a plasma-sprayed wear-resistant coating on the body, which can withstand high-temperature friction (up to 700-900℃) and extreme shear stress during cutting, reducing wear failure rate by more than 40%. In addition, manufacturers provide personalized customization services, including anti-corrosion treatments for humid underground environments and shank structure modifications to match special shearer drum interfaces.

The U90 Series is mainly applied in mining scenarios equipped with medium and high-power shearers, covering underground thick coal seam mining, open-pit coal-rock stripping operations, and semi-coal rock tunnel excavation projects. Its application scope focuses on large and medium-sized mining projects with high load, high efficiency requirements, and complex coal-rock composite working conditions, which is highly consistent with its heavy-duty performance positioning.

In underground thick coal seam mining, the U90 Series is particularly suitable for working conditions where large-power shearers are deployed, as its robust structure can withstand long-term high-load cutting operations. Its reasonable weight and size design facilitate stable installation on large shearer drums, ensuring smooth operation in relatively spacious mining working faces.

In open-pit mining operations, it is widely used for coal-rock stripping and coal seam cutting, where its high efficiency and strong durability can minimize equipment downtime caused by frequent pick replacement.

In semi-coal rock tunnel excavation, the series exhibits excellent adaptability to alternating coal and rock layers: uniform wear performance ensures stable cutting efficiency, avoids equipment vibration caused by uneven cutting, and effectively protects the shearer drum and other key components.

A practical application case in a large coal mine in Shanxi, China, fully verifies the excellent performance of the U90 Series. This mine mainly mines medium-hard coal seams mixed with massive gangue, and the original picks had problems such as frequent tip chipping and short service life, which seriously restricted mining efficiency and increased operational costs. After switching to U90 Series picks (mainly U94 and U95 models), the average service life of a single pick was extended by 65%, pick consumption per unit output was reduced by 35%, mining efficiency was increased by 20%, and the downtime caused by pick replacement was reduced by nearly 60%, significantly lowering the comprehensive operational costs of the mine. This case fully demonstrates the strong adaptability of the U90 Series to harsh coal-rock composite working conditions and its remarkable economic benefits for large and medium-sized mining enterprises.

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