Our truck crane slewing bearings are designed as the critical rotational interface between the upper rotating structure (including boom, jib, and operator cabin) and the lower fixed chassis. These components must simultaneously support axial loads, radial forces, and overturning moments while enabling smooth 360-degree rotation – often under dynamic working conditions with frequent start-stop cycles.
Constructed from premium alloy steels such as 42CrMo4 and 50Mn, our bearings feature induction-hardened raceways that provide exceptional wear resistance and extended service life even in abrasive environments. The integrated external or internal gearing allows direct connection to hydraulic motors or gearboxes, eliminating the need for additional transmission components and reducing overall system complexity.
We offer both sealed and open designs, with multi-lip labyrinth seals available for applications requiring enhanced protection against dust, moisture, and contaminants. For coastal or chemical plant operations, we can supply bearings with specialized corrosion-resistant coatings and stainless steel rolling elements.
Our slewing bearings for truck-mounted cranes are widely deployed across multiple industries where mobility and lifting capacity are paramount:
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Mobile Construction Cranes: Used in telescopic boom truck cranes ranging from 8-ton to 100-ton capacity, enabling rapid deployment and precise positioning at urban construction sites.
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Utility & Maintenance Vehicles: Integrated into bucket trucks and aerial work platforms for power line maintenance, street lighting repair, and tree trimming operations.
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Emergency Rescue Equipment: Installed on fire department ladder trucks and disaster response vehicles requiring reliable rotation under extreme conditions.
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Port & Logistics Handling: Applied in small-scale mobile harbor cranes and container handlers where space constraints demand compact yet powerful rotary solutions.
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Oilfield Service Rigs: Utilized in well servicing trucks and cementing units operating in harsh desert or offshore environments with high vibration and temperature variations.
Each application benefits from our bearing's ability to maintain rotational smoothness despite uneven ground conditions, frequent tilting angles, and shock loads typical in field operations.
