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SD.25.B

The SD.25.B slewing bearing is a single row four-point contact ball bearing designed to handle axial, radial, and moment loads simultaneously. It features a specific size configuration denoted by its designation, indicating internal and external diameter dimensions. With a robust construction typically made from high-quality materials like forged or cast steel, it offers durability and reliability in demanding applications such as cranes, excavators, and wind turbines. The bearing is engineered to operate at rotational speeds suitable for its design, ensuring efficient performance under various load conditions. Proper lubrication is essential to minimize friction and wear, thereby maintaining smooth operation and extending the bearing's service life. These characteristics collectively make the SD.25.B slewing bearing a preferred choice for industries requiring precise rotational movement and heavy load-bearing capacity.

Standard

GB,ASTM/AISI,ГОСТ,BS,JIS,NF,DIN/VDEh,DIN/VDEh

Inner diameter

120mm-8000mm

Outer diameter

280mm-8000mm

Weight

20kg-8000kg

Structures

Outer Ring, Inner Ring, Spacer, Rolling element, Seal

Brand

QIBR/OEM/Neutral

Package

Standard Export Package

Material

42CrMo, 50Mn, or Stainless Steel

Applications

Hoisting machinery, construction machinery, material handling machinery, mining machinery, metallurgical machinery, medical instruments,ships and warships, radar,wind turbine

QIBR Model Selection

Filters

External diameter on inner ring (C)

Gear type

Inner diameter (Di)

Internal diameter on outer ring (U)

Outer diameter (Da)

Weight

NO.	Product Number	External diameter on inner ring (C)	Gear type	Inner diameter (Di)	Internal diameter on outer ring (U)	Outer diameter (Da)	Weight
1	SD.1055.25.00.B	956 mm	No Gear	855 mm	956 mm	1055 mm	115 kg
2	SD.1155.25.00.B	1056 mm	No Gear	955 mm	1056 mm	1155 mm	128 kg
3	SD.855.25.00.B	756 mm	No Gear	655 mm	756 mm	855 mm	90 kg
4	SD.955.25.00.B	856 mm	No Gear	755 mm	856 mm	955 mm	101 kg

Features and advantages of QIBR four-point contact ball slewing bearings SD.25.B series

QIBR four-point contact ball slewing bearings SD.25.B series have many significant features and advantages, which play an important role in various fields, mainly in the following aspects:

1. QIBR four-point contact ball slewing ring bearings SD.25.B series with low friction

QIBR four-point contact ball slewing bearings SD.25.B series help to improve mechanical efficiency and reduce energy consumption because of the small contact area and low friction of four contact points between the raceway and the steel ball.

2. QIBR four-point contact ball slewing bearings SD.25.B series have good stability and long life

Because the SD.25.B series bearings' load is evenly distributed, the working stability is higher, while vibration and noise are reduced, improving the stability and reliability of the bearing system's operation. The optimized contact angle and load distribution minimize internal wear, ensuring a longer service life.

3. Customized service of QIBR four-point contact ball slewing ring bearings SD.25.B series

QIBR four-point contact ball slewing bearings SD.25.B series can provide customized service and design the bearings according to the specific requirements, which can meet the demands of different industries and working conditions.

Performance improvements and solutions of QIBR four-point contact ball slewing bearings SD.25.B series

1. Improvement of bearing material properties

The QIBR four-point contact ball slewing ring bearings SD.25.B series are surface zinc plated and treated with other methods to ensure outstanding corrosion resistance and an extended service life.

2. Improvement of bearing rotational accuracy

QIBR four-point contact ball slewing bearings SD.25.B series are manufactured with state-of-the-art processing equipment and techniques, including precision heat treatment and advanced machining centers. These processes significantly improve the geometric accuracy of the inner and outer rings, reduce machining errors, and upgrade the rotational accuracy and stability of the bearings.

3. Reduce bearing maintenance and replacement needs

QIBR four-point contact ball slewing bearings SD.25.B series are designed with seals and lubrication holes; the seals can prevent contaminants from entering the bearings and reduce grease leakage; the lubrication holes are convenient for grease filling. This will extend life and reduce the cost of maintenance and replacement.

4. Customized design

For different circumstances, the QIBR four-point contact ball slewing bearings SD.25.B series can be tailored with individual dimensional solutions to meet special applications. This design not only enriches the standard of bearings but also demonstrates our commitment to providing practical guidance for manufacturers to meet the individual needs of users, making them feel catered to and valued.

Overall, by optimizing materials, manufacturing accuracy, designing individually, and other measures, the performance of QIBR four-point contact ball slewing ring bearings SD.25.B series can be significantly improved to meet the increasingly demanding application needs.

Main application fields of QIBR four-point contact ball slewing bearings SD.25.B series

Machine tool

The QIBR four-point contact ball slewing bearings SD.25.B series can bear significant radial and axial loads and overturning moments, ensuring stable support and high-speed performance in CNC machine spindles and rotary tables.

Wind turbines

QIBR four-point contact ball slewing bearings SD.25.B series are used in the slewing connection between the tower and the nacelle of wind turbines, helping to achieve the smooth rotation of the nacelle to align with the wind direction.

Amusement facilities

QIBR four-point contact ball slewing bearings series SD.25.B are used in carousels to ensure their safe and stable operation.

Radar systems

The QIBR four-point contact ball slewing bearings series SD.25.B are utilized in the rotating component of radar antennas to guarantee precise monitoring and tracking.