Four Point Contact Ball Slewing Bearing

Four Point Contact Ball Slewing Bearing for Excavator and Crane

Four point contact ball slewing bearing is mainly composed of an inner ring, outer ring, single-row steel balls, cage (or spacer), sealing device, and other parts. The inner ring and outer ring of the four-point contact ball slewing bearing has integral and split structures. The rigidity of the integral ferrule is relatively muscular, and the split type is easy to adjust. The split structure uses bolts to connect the two split rings before the product leaves the factory. Four point contact ball slewing bearings generally have cages (or spacers).
The full-filled ball structure is only working when the load is relatively large. The full-filled four point contact ball slewing bearing has a significant bearing capacity but a sizeable frictional resistance. Friction can also easily cause scratches on the surface layer of the steel ball. The basic structure of the four point contact ball slewing bearing/slewing ring: with or without gears, external gears, and internal gears, with high static load capacity. Four point contact ball slewing bearings are particularly versatile and are widely used in cranes, lifting equipment, and other engineering machinery.

Four Point Contact Ball Slewing Bearing Specifications:

Four point contact ball slewing bearing is suitable for construction machinery, such as rotary conveyors, welding robots/manipulators, small and medium cranes, and excavators.

1. Material: 42CrMo, 50Mn
2. Seal type: Nitrile rubber
3. Features: Four-point contact internal tooth / external tooth / no tooth
4. Inner diameter size: 100-8000mm
5. Outer diameter: 200-10000mm
6. Warranty: 12 months
7. Rolling body: steel ball
8. Normalizing hardness: 187HB-241HB
9. Quenched and tempered hardness: 229HB-269HB
10. Raceway quenching hardness: HRC 55-62

Structure of Four Point Contact Ball Slewing Bearing

	1. Inner Ring
	2. Outer Ring
	3. Seal
	4. Spacer
	5. Ball/Roller

Types of Four Point Contact Ball Slewing Bearing

Four Point Contact Ball Slewing Bearing with No Gear	Four Point Contact Ball Slewing Bearing with External Gear	Four Point Contact Ball Slewing Bearing with Internal Gear

Four Point Contact Ball Slewing Bearing Dimensions:

(1) External Gear Type Four Point Contact Ball Slewing Bearing Model Parameters

(2) Internal Gear Type Four Point Contact Ball Slewing Bearing Model Parameters

(3) Gearless Type Four Point Contact Ball Slewing Bearing Model Parameters

Benefits

Four point contact ball slewing bearings offer a number of benefits over other types of slewing bearings, including:

1. High load capacity: Four point contact ball slewing bearings can handle both radial and axial loads, and their unique design allows them to support higher loads than other types of bearings.
2. Axial and radial stiffness: The four-point contact design of the bearing provides high axial and radial stiffness, which is important for applications where precision and stability are required.
3. Compact design: Four point contact ball slewing bearings have a compact design, which makes them ideal for applications where space is limited.
4. Low friction: The rolling contact between the balls and the raceway of the bearing results in low friction, which translates to high efficiency and reduced energy consumption.
5. Easy installation and maintenance: Due to their simple design, four point contact ball slewing bearings are easy to install and maintain, which helps to reduce downtime and maintenance costs.
6. Long lifespan: The high load capacity and low friction of the four point contact ball slewing bearing result in a long lifespan, making them a reliable choice for demanding applications.

Overall, the benefits of four point contact ball slewing bearings make them a popular choice for a wide range of industrial applications.

Four Point Contact Ball Slewing Bearing Applications

Four-point contact ball slewing bearings are a type of bearing that can withstand radial, thrust, and moment loads in either direction. This makes them ideal for a wide variety of applications, including:
(1) Tower cranes: Tower cranes are used to lift heavy loads, and they need bearings that can withstand the weight of the load and the forces generated by the crane’s movements. Four-point contact ball slewing bearings are a common choice for tower cranes because they can handle the heavy loads and the dynamic forces involved.
(2) Mobile cranes: Mobile cranes are similar to tower cranes, but they are designed to be moved from one location to another. Four-point contact ball slewing bearings are also a common choice for mobile cranes because they are durable and can withstand the forces generated by the crane’s movements.
(3) Lifting platforms: Lifting platforms are working to lift people and materials to different heights. Four-point contact ball slewing bearings are a common choice for lifting platforms because they can handle the weight of the load and the forces generated by the platform’s movements.
(4) Construction equipment: Construction equipment, such as excavators and bulldozers, often needs bearings that can withstand heavy loads and dynamic forces. Four-point contact ball slewing bearings are a common choice for construction equipment because they are durable and can handle the forces involved.
(5) Wind turbines: Wind turbines need bearings that can withstand the weight of the turbine and the forces generated by the wind. Four-point contact ball slewing bearings are a common choice for wind turbines because they are durable and can handle the forces involved.
In addition to these common applications, four-point contact ball slewing bearings can working in a variety of other applications, such as:
1. Robotics: Robots often need bearings that can withstand high speeds and dynamic loads. Four-point contact ball slewing bearings are a good choice for robots because they are durable and can handle the forces involved.
2. Aerospace: Aerospace applications often require bearings that can withstand extreme temperatures and pressures. Four-point contact ball slewing bearings are a good choice for aerospace applications because they are durable and can handle the harsh environments involved.
3. Medical equipment: Medical equipment often needs bearings that are clean and sterile. Four-point contact ball slewing bearings are a good choice for medical equipment because they are easy to clean.
Four-point contact ball slewing bearings are a versatile and durable type of bearing that can work in a wide variety of applications. They are a good choice for applications that require high load carrying capacity, dynamic load capacity, and speed capability.

Manufacturers

1. We are a professional manufacturer and supplier of slewing bearings;

2. We make all kinds of slewing bearings, such as four-point contact ball slewing bearings, single row cross roller slewing bearings, double row ball slewing bearings, three row roller slewing bearings, flange slewing bearings, light series slewing bearing.

3. We are capable of designing and manufacturing non-standard slewing bearings independently.

4. Our products are widely workingin various applications, such as port, ship, vehicle, mining, engineering, lifting, environmental protection, oil, chemicals, light industry, metallurgical machinery, the military, etc.

5. With thirty years of experience, widely export our products to the USA, Germany, Japan, Spain, Canada, Italy, France, Finland, Korea, India, Singapore, Brazil, Australia, etc. If you need slewing bearing, please feel free to contact us.