As a cornerstone of the global industrial system, the mining industry bears the core mission of extracting and transporting various mineral resources. Its operating environment often involves harsh conditions such as high dust levels, strong impacts, heavy loads, and extreme temperature differences, placing near-stringent demands on the reliability and durability of core machinery. Slewing bearings, as the "joint" components of mining machinery, also known as slewing rings, are the core hub connecting the stationary and rotating parts of equipment, directly determining the operating efficiency, operational safety, and service life of mining equipment. Whether it's excavators and cranes in open-pit mines or tunneling machines and scraper conveyors in underground mining, all rely on the support of high-performance slewing bearings. As a professional slewing bearing manufacturer, LTZC has been deeply involved in the mining field for many years, providing bearings of various types and structures for mining equipment both domestically and internationally. With customized product design, stringent quality control, and comprehensive technical services, LTZC has become a preferred brand for mining bearings, providing global mining companies with slewing bearing solutions suitable for various working conditions.

Core Requirements for Slewing Bearings in the Mining Industry

Mining equipment operates under conditions of high dust, high load, and continuous operation, placing stringent demands on the performance of Drehlager. Large excavators, mining cranes, and bucket wheel excavators bear enormous axial loads, radial loads, and overturning moments during operation. Over prolonged periods, these loads accumulate, leading to severe wear and even equipment shutdown.

LTZC has optimized the raceway structure and material formula of its slewing bearings for high loads and continuous operation. Using high-strength alloy steel and undergoing special heat treatment, the raceway hardness reaches HRC58-62, effectively dispersing impact loads, preventing localized stress concentration, and ensuring long-term stable operation under heavy-load impact conditions. Simultaneously, it employs a centralized lubrication system or self-lubricating materials to extend lubrication cycles, reduce the frequency of manual maintenance, and ensure efficiency for continuous operation.

For high-dust working environments, LTZC employs a composite sealing structure of three-lip seal + labyrinth protection in all its mining-specific slewing bearing products, achieving a dustproof rating of IP67. This effectively prevents the intrusion of impurities such as dust, mud, and moisture. Combined with specialized sealing grease, the sealing performance is further enhanced. For damp and corrosive underground conditions, LTZC also offers customized treatments such as galvanizing and spraying anti-corrosion layers to improve the bearing's corrosion resistance, making it suitable for special scenarios such as seabed mining and high-humidity underground environments.

LTZC excavator slewing bearing solutions

Excavators are one of the most crucial pieces of equipment in the mining industry. As a core component connecting the excavator's upper frame and chassis, the excavator slewing bearing plays a vital role in supporting the weight of the upper frame, transmitting digging impact forces, and enabling the upper frame to rotate 360° flexibly. Its performance directly determines the excavator's operating efficiency and stability.

LTZC has developed several excavator slewing bearing products specifically designed for the operating characteristics of excavators, covering three mainstream structures: single-row four-point contact ball bearing, double-row ball slewing ring,Und three-row cylindrical roller bearing, suitable for a full range of models from small excavators to giant bucket excavators. Among them, the three-row cylindrical roller excavator slewing bearing is LTZC's core product. It adopts a structural design of inner ring, outer ring and three rows of cylindrical rollers, which can simultaneously withstand huge axial loads, radial loads and overturning moments. It has extremely high rigidity and excellent impact resistance, and is perfectly suited to the heavy load requirements of large mining excavators of 90 tons and above. Its maximum axial load capacity can reach 26,000 kN, and its overturning moment can reach 11,000 kNm. It is as stable as a mountain during continuous rotation operation and can effectively cope with the severe impact and load fluctuations during excavation.

contact LTZC for excavator slewing bearing solutions

LTZC cranes slewing ring solutions

In the mining industry, cranes are mainly used for ore hoisting, equipment installation, and maintenance. They come in various types, including tower cranes and crawler cranes. Their operation is characterized by large loads, high rotational accuracy requirements, and complex working environments, placing stringent demands on the load-bearing capacity, rotational smoothness, and reliability of crane slewing rings. As the connecting hub between the rotating and stationary parts of the crane, the crane slewing ring must withstand the axial forces, radial forces, and overturning moments generated by the hoisting load, while simultaneously achieving precise boom rotation to ensure the safety and stability of the ore hoisting process.

LTZC crane slewing rings are designed to meet the operational needs of mining cranes, employing optimized structural design and material processes. They are mainly available in two types: double-row ball type and crossed cylindrical roller type. Double-row ball crane slewing rings are compact, have high load-bearing capacity, and can withstand multi-directional loads simultaneously. They have low rotational resistance and are suitable for medium to large tower cranes and crawler cranes, enabling smooth boom rotation and reducing the impact of load fluctuations on the bearings. Crossed cylindrical roller crane slewing rings feature a compact design with cross-arranged rolling elements, resulting in a large contact area, high rigidity, and high rotational accuracy. They are suitable for mining cranes requiring high rotational accuracy, such as small underground cranes and precision lifting equipment, ensuring precise boom positioning and improving the safety and efficiency of lifting operations.

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China slewing bearing manufacturer——LTZC bearings

In the future, LTZC will continue to increase its R&D investment, continuously promote technological innovation, optimize product structure and processes, improve product quality and performance, and launch more slewing bearing products adapted to the extreme working conditions of the mining industry. LTZC aims to provide global mining companies with higher-quality, more reliable, and more competitive mining bearing solutions, contributing to the high-quality development of the mining industry and providing solid core component support for the global mineral resource extraction business.