Four-Point Contact Ball Slewing Bearings

Introduction

The Four-Point Contact Ball Slewing Bearing is the most widely used and versatile type of rotational solution in the industrial market. Comprising two seat rings, this bearing features a compact design and a unique raceway geometry where the balls contact the track at four distinct points. This specialized structure allows a single bearing to simultaneously accommodate axial loads, radial loads, and tilting moments.

Whether for light-duty turntables or heavy-duty construction machinery, our four-point contact ball slewing rings offer a perfect balance between performance, durability, and cost-efficiency.

Technical Parameter Tables

Below are the specifications for our standard 01 Series (Single Row Four-Point Contact Ball) bearings. We offer these in three gearing configurations: Non-Gear (010), External Gear (011), and Internal Gear (013).

Table 1: Standard Series Specifications (Light to Medium Duty)

Table 2: Geared Series Parameters (Sample Data)

Custom gear modules (m) and teeth counts (z) are available upon request.

Key Features & Benefits

• Compact Single-Row Design: The single-row ball structure provides a low profile, making it ideal for machines with limited vertical space.
• Four-Point Contact Logic: Each ball contacts the induction-hardened raceways at four points, ensuring that tilting moments are distributed evenly, which reduces stress and extends service life.
• Smooth & Quiet Rotation: Precision-ground balls and spacers (or cages) minimize friction, ensuring low-noise operation and high rotational efficiency.
• Cost-Effective Performance: Compared to crossed roller or multi-row designs, the four-point contact ball bearing offers the best "load capacity per dollar" ratio for general-purpose applications.
• Flexible Gearing Options: Available in internal, external, or non-geared versions to perfectly integrate with your motor and pinion drive system.

Material & Manufacturing Excellence

1. Forged Steel Rings: We use high-quality 50Mn or 42CrMo forged steel to ensure superior structural strength.
2. Advanced Heat Treatment: The raceways undergo state-of-the-art induction hardening (55–62 HRC), while the gear teeth can be quenched and tempered for added toughness.
3. High-Performance Sealing: Integrated NBR lip seals prevent grease leakage and protect the internal components from water, dust, and industrial debris.

Typical Applications

Four-point contact ball slewing bearings are the "backbone" of numerous industries:

• Construction: Truck-mounted cranes, tower cranes, and concrete pumps.
• Water Treatment: Clarifiers and thickener drives.
• Renewable Energy: Dual-axis solar trackers and wind turbine yaw systems.
• Industrial Automation: Conveyor turntables and robotic welding positioners.
• General Machinery: Bottling plants, packaging machines, and amusement rides.

Why Partner With Us?

• Full Technical Support: From initial load calculation to final CAD drawing approval, our engineers work with you at every step.
• Global Quality Standards: Manufactured in accordance with ISO 9001:2015.
• Rapid Prototyping: Short lead times for custom dimensions and specialized gear profiles.

Ready to enhance your equipment's performance? Contact us today for a detailed technical quote and 2D/3D models of our Four-Point Contact Ball Slewing Bearings!