Product Description

High quality Heavy Load slewing drive slewing bearing SC25 for aerial working platfrom and mounting crane, excavator and crane

Model Slewing Bearing SC25 Brand Corresun Drive
Holding Torque 158.3kN.m Tilting Moment Torque 271kN.m
Self-locking Yes Gear Ratio 150:1
Outer Dia. 675mm Inner Dia. 565mm
Rated Output Speed 1.5rpm Precison 0.17°
Static Axial Rating 2360kN Static Radial Rating 945kN

The slewing drive is a new type of slewing product, usually called slewing ring, which is usually composed of worm, slewing ring, housing, motor and other components. Since the core components are slewing bearings, they can simultaneously withstand axial forces, radial forces, and overturning moments. Compared with traditional rotary products, the new slewing drive features easy installation, easy maintenance and a greater degree of installation space.

Single Row Four Point Contact Ball Slewing Bearingis composed of 2 seat rings.It features compact in design,and light in weight.The balls contact with the circular race at four points,via which the axial force,radial force and resultant moment may be born simultaneously.

It can be used for slewing conveyer, welding manipulator, light & medium duty crane, excavator, and other construction machinery, welding arms and positioners, light,medium duty cranes,excavators and other engineering machines.

The Single Row Crossed Roller Slewing Bearing  is composed of two searings. It features compact in design, light in weight,high precision and small fitting clearance.
As the rollers are 1:1cross arranged,it is suitable for high precision mounting and capable to bear axial force,resultant moment and considerable large radial force.

The single-row crossed roller Slewing Bearings are widely used for hoisting,transporting,engineering machines as well as for marine crane products.

The Double Row Ball Slewing Bearing has three seat rings.The steel balls and the spacers may be directly arranged into the upper and lower races.Two rows of steel balls with different diameters are fitted according to the force bom.Such open mode fitting features extraordinary convenience.The load angles of both upper and lower races are 90°,which enable the bearing to bear large axial force and the tipping moment. When the radial force is larger than 1/10 of the axial force the races should be newly designed.

As the axle and the dimension of the double row ball slewing bearing are rather large,the bearing construction is sturdy ,hence it is especially suitable for tower cranes which require working radius over medium range,mobile cranes and loading and unloading machines

The Three Row Roller Slewing Bearing has three seatrings,which separate the upper,lower and radial races,via which the load of each row of the rollers may be specified.It may bear different loads simultaneously and its load capacity is the largest one among the four models.

Thanks to the large size of its axle and radius,it is sturdy and especially suitable for heavymachines which require large working radius.such as bucketwheel excavators,wheeled cranes,ship cranes,ladle turrets,heavy duty mobile cranes etc.

Mining machine, construction equipment, port hoisting machine, port oil transfer equipment, onshore and offshore crane, excavator,concrete machine, revolving grabbers and winches,plastic and rubber machine, weave machine, logging industry machines, wind-power generation,electronic power plant, water treatment machinery, drilling equipment and steering applications.


Coresun Drive Slewing Drive, Slewing Ring Advantage

1. CHINAMFG Drive Slewing drive designed with hourglass worm shaft which provides more tooth contact and higher torque.

2. High transmission efficiency and accurate tracking

3. Easy installation and maintenance

4.Special heat treatment,corrosion resistance

5.We use framework oil sealing, so our slewing drive has higher dustproof and waterproof

6.CHINAMFG Drive use 8 bolts on worm shaft, so it is much stronger

Coresun Drive Slewing Bearing Production Photo

SC25 Slewing Drive Slewing Bearing Worm Gear Application

Products testing report


It is sincerely looking CHINAMFG to cooperating with you for and providing you the best quality product & service with all of our heart!
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Holding Torque: 158.3kn.M
Tilting Moment Torque: 271kn.M
Output Torque: 30kn,M
Output Speed: 1.5rpm
Gear Ratio: 102:1
IP Class: IP65



Can you explain the impact of slewing rings on the overall efficiency of rotating systems?

Slewing rings play a crucial role in the overall efficiency of rotating systems. Their design, performance, and proper functioning significantly impact the efficiency, performance, and reliability of various rotating systems. Here’s a detailed explanation of the impact of slewing rings on the overall efficiency of rotating systems:

  • Rotational Movement: Slewing rings enable smooth and controlled rotational movement in rotating systems. They support the rotation of components such as booms, arms, platforms, or structures with minimal friction and resistance. By minimizing energy losses due to friction, slewing rings contribute to the overall efficiency of the system.
  • Precision and Accuracy: Slewing rings provide precise and accurate motion control in rotating systems. They ensure smooth and controlled rotation, allowing for precise positioning, alignment, or tracking of components. The ability to achieve precise movements reduces the need for corrective actions and enhances the overall efficiency and productivity of the system.
  • Load-Bearing Capacity: Slewing rings are designed to handle significant loads in rotating systems. They provide robust load-bearing capabilities, distributing the load evenly and minimizing stress concentrations. By efficiently carrying and transferring loads, slewing rings optimize the system’s load capacity and prevent premature wear or failure of components.
  • Reduction of Friction and Wear: Properly lubricated and maintained slewing rings help reduce friction and wear in rotating systems. They minimize the energy losses associated with friction, resulting in improved efficiency. Reduced friction also decreases the wear and tear on the components, prolonging their lifespan and reducing the need for frequent repairs or replacements.
  • Stability and Safety: Slewing rings provide stability and safety to rotating systems. They ensure the smooth and stable rotation of components, minimizing vibrations, wobbling, or unintended movements. This stability not only enhances the system’s efficiency but also improves the safety of operations, reducing the risk of accidents or damage to the equipment and surrounding environment.
  • Impact on Power Transmission: Slewing rings are often integrated with power transmission systems in rotating systems. They efficiently transmit power from the drive source to the rotating components, ensuring the effective transfer of torque and rotational force. By optimizing power transmission, slewing rings contribute to the overall efficiency and performance of the system.
  • System Integration and Versatility: Slewing rings are designed to integrate seamlessly into various rotating systems. They can be customized to meet specific requirements, such as size, load capacity, or environmental conditions. The versatility of slewing rings allows for their efficient integration into different applications, enhancing the overall efficiency and adaptability of the rotating systems.

In summary, slewing rings have a significant impact on the overall efficiency of rotating systems. Their contribution to smooth rotational movement, precision, load-bearing capacity, reduction of friction and wear, stability, power transmission, system integration, and versatility all play a vital role in maximizing the efficiency, performance, and reliability of various rotating systems in industries such as construction, material handling, energy, transportation, and manufacturing.

What safety considerations should be taken into account when using slewing rings in industrial settings?

When using slewing rings in industrial settings, several safety considerations should be taken into account to ensure the well-being of personnel, equipment, and the surrounding environment. Here’s a detailed explanation of the safety considerations when using slewing rings:

  • Proper Training and Familiarity: Personnel involved in the operation, maintenance, and servicing of systems equipped with slewing rings should receive proper training and be familiar with the specific procedures and safety guidelines related to slewing ring usage. This includes understanding the system’s limitations, recommended operating parameters, and emergency procedures.
  • Safe Working Distance: Establishing a safe working distance is crucial when working with rotating systems that incorporate slewing rings. Adequate barriers, guardrails, or safety signs should be in place to prevent unintended access to hazardous areas around the slewing ring. Personnel should be aware of the safe working zones and maintain a safe distance from the rotating components.
  • Lockout/Tagout Procedures: Before performing any maintenance or repair tasks on systems with slewing rings, proper lockout/tagout procedures should be followed to ensure the equipment is de-energized and cannot be accidentally started. This prevents unexpected rotation of the slewing ring during maintenance activities, reducing the risk of entanglement or injury.
  • Personal Protective Equipment (PPE): Personnel working with or around slewing rings should wear appropriate personal protective equipment, such as safety helmets, protective eyewear, gloves, and safety footwear. The specific PPE requirements may vary depending on the nature of the industrial setting and potential hazards associated with slewing ring operation.
  • Regular Inspection and Maintenance: Routine inspection and maintenance of slewing rings are essential for identifying any signs of wear, damage, or misalignment. Regularly scheduled inspections help detect potential issues early on and allow for timely repairs or replacements, reducing the risk of sudden failures or accidents during operation.
  • Proper Lubrication: Adequate lubrication of slewing rings is crucial for their optimal performance and longevity. Lubrication intervals and methods recommended by the manufacturer should be followed to ensure proper lubrication. Improper or inadequate lubrication can lead to increased friction, overheating, accelerated wear, and potential failure of the slewing ring.
  • Environmental Considerations: The environmental conditions in which slewing rings operate should be taken into account for safety purposes. Factors such as temperature extremes, moisture, dust, or corrosive substances can affect the performance and durability of slewing rings. Proper sealing, protective coatings, and environmental controls should be implemented to mitigate potential hazards and ensure safe operation.
  • Emergency Stop and Shutdown: Rotating systems equipped with slewing rings should be equipped with emergency stop buttons or other means of immediate shutdown. Personnel should be trained on how to use these emergency stop features effectively and be aware of the emergency shutdown procedure to quickly and safely halt the rotation of the slewing ring in case of an emergency.
  • Compliance with Regulations and Standards: It is essential to comply with relevant safety regulations, standards, and industry guidelines when using slewing rings in industrial settings. These regulations may vary depending on the region and industry-specific requirements. Adhering to these guidelines helps ensure the safety and compliance of the equipment and protects against potential hazards.

In summary, safety considerations when using slewing rings in industrial settings include proper training, maintaining safe working distances, following lockout/tagout procedures, wearing appropriate PPE, conducting regular inspections and maintenance, ensuring proper lubrication, considering environmental factors, implementing emergency stop measures, and complying with safety regulations. By addressing these safety considerations, the risks associated with slewing ring operation can be minimized, promoting a safe working environment and preventing accidents or injuries.

What advantages do slewing rings offer compared to other rotational components?

Slewing rings offer several advantages compared to other rotational components. Their unique design and features make them a preferred choice in various applications. Here’s a detailed explanation of the advantages that slewing rings offer:

  • Compact Design: Slewing rings have a compact design that allows for efficient use of space. Compared to other rotational components such as gears and bearings, slewing rings provide a compact solution for supporting axial, radial, and moment loads while enabling rotational motion. Their compactness is especially advantageous in applications with limited space or weight constraints.
  • High Load-Carrying Capacity: Slewing rings are designed to handle significant loads. They are capable of supporting both axial and radial loads, as well as moment loads that result from uneven weight distribution or external forces. The robust construction and precise engineering of slewing rings enable them to withstand heavy loads, making them suitable for applications that require high load-carrying capacity.
  • Smooth Rotation: Slewing rings offer smooth rotation, allowing for precise and controlled motion. The rolling elements, whether balls or rollers, are positioned and guided within the raceways of the slewing ring to minimize friction and ensure smooth movement. This smooth rotation contributes to precise positioning and controlled motion, which is essential in applications that require accurate positioning and smooth operation.
  • Integrated Gear Mechanism: Many slewing rings come with an integrated gear mechanism. This eliminates the need for additional gearing components, simplifies the design, and reduces assembly time and costs. The integrated gear mechanism allows for torque transmission and rotational control, enabling precise and controlled motion without the need for external gearing systems.
  • Backlash Control: Slewing rings can be designed with minimal backlash, ensuring precise motion control. Backlash refers to the play or clearance between mating gears or components, which can lead to lost motion or inaccuracies in positioning. By minimizing backlash, slewing rings offer improved accuracy and repeatability in motion control applications.
  • Versatility and Customization: Slewing rings are highly versatile and can be customized to meet specific application requirements. They can be tailored in terms of dimensions, load capacity, mounting interfaces, gear specifications, sealing systems, and materials. This versatility allows slewing rings to be optimized for various industries and applications, ensuring the best performance and compatibility.
  • Durable and Low Maintenance: Slewing rings are designed to be durable and require minimal maintenance. They are constructed with high-quality materials, precision manufacturing, and appropriate sealing systems to withstand harsh operating conditions and contaminants. This durability and low maintenance requirement contribute to the long service life and reliability of slewing rings.

Overall, slewing rings offer advantages such as compact design, high load-carrying capacity, smooth rotation, integrated gear mechanism, backlash control, versatility, customization options, and durability. These advantages make slewing rings a preferred choice in various applications, including construction machinery, material handling equipment, cranes, wind turbines, robotics, and manufacturing systems.

China best 25 Inch Slewing Gear Reduction for Truck Crane  China best 25 Inch Slewing Gear Reduction for Truck Crane
editor by CX 2024-04-12