Application of Slewing Bearings in Agricultural Equipment

I. What are agricultural slewing bearings?

1.1 What are slewing bearings?

Slewing bearings are large-sized bearings capable of accommodating axial loads, radial loads, and overturning moments while facilitating 360-degree rotational movement. They are composed of components such as inner and outer rings, rolling elements, spacers, seals, and gears. Slewing bearings are commonly used in construction machinery, agricultural machinery, photovoltaic equipment, port equipment, and more.

1.2 Agricultural slewing bearings

Agricultural slewing bearings are slewing bearings specifically designed and developed for agricultural machinery. They are specialized slewing bearings tailored to the operational requirements of various types of farm equipment and serve as the "core joint" of the machinery's rotating mechanisms.

II. What are the types of agricultural slewing bearings?

Within the industry, agricultural slewing bearings are categorized into four core types based on their rolling element configuration: single-row four-point contact ball, double-row ball (with unequal ball diameters), crossed cylindrical roller, and three-row cylindrical roller. Each type differs significantly in terms of load-bearing capacity, rigidity, precision, cost, and suitability for specific agricultural machinery applications; consequently, OEMs must select the appropriate bearing based on equipment loads, installation space, and operational precision requirements.

2.1 Comparison Table of Four Categories of agricultural slewing bearings

III. What factors should be considered when selecting agricultural slewing bearings?

3.1 Load Parameter Calculation

When purchasing agricultural slewing bearings, the equipment's load must be the primary consideration. Load calculations should be performed based on full-load operating conditions to determine the appropriate structural type of the slewing bearing.

3.2 Operating Environment Conditions

Slewing bearings for agricultural machinery typically operate in environments characterized by dust, mud, and exposure to pesticides. These conditions place high demands on the bearing's sealing and lubrication systems. Therefore, during procurement, it is essential to verify the seal material and type with technical personnel to prevent seal or lubrication failure, which could lead to premature bearing damage.

3.3 Rotation Precision and Clearance Requirements

For standard agricultural machinery (harvesting, loading, fertilizer spreading): Select slewing bearings with standard P0 clearance; these offer smooth rotation and lower costs while meeting basic operational needs.

For precision equipment (precision seeding, variable-rate fertilization, smart orchard machinery): Select P6/P5 precision agricultural slewing bearings. These feature minimal clearance control and zero rotational play, ensuring precise and stable operating angles; cross-roller bearing structures are the preferred choice for such farm equipment.

3.4 Supplier's Comprehensive Capabilities

When purchasing slewing bearings, focus on the supplier's delivery capabilities, certifications, and after-sales service. LTZC Bearings operates its own manufacturing workshops and boasts over 30 years of industry experience. Equipped with multiple CNC machining units and capable of regular batch deliveries, the company provides customized slewing bearing solutions. LTZC Bearings holds BV factory certification as well as ISO9001 and ISO45001 certifications, meeting the procurement needs of global customers; a 1–3 year warranty is provided for the complete agricultural slewing bearing unit.

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