China Standard Sc14 Slewing Drive Gear Motor for Aerial Working Platform bevel gearbox

Product Description

CHINAMFG Drive slew worm drive system is a compactly constructed unit which consists of a slewing ring, base plate and worm.
This unit brings the advantages of a slewing ring and a worm into 1 unit. It is suitable for applications which demand slow rotation with a continuous or cyclical movement capable of handling combined loads.

Slewing drives are perfect for situations requiring both load-holding and rotational torque from the same gearbox.Ttypical applications include solar trackers, wind turbines, satellite and radar dishes, truck cranes, man lifts, utility equipment, hydraulic equipment attachments, oil tool equipment, tire handlers, digger derricks, and automotive lifts.


The performance ranges from 6kNm to 220kNm of holding torque, 200Nm to 63kNm of output torque, 500Nm to 271kNm of overturning moment load capacity, and gearbox reduction ratios of 30:1 up to 156,600:1. The mounting can be done horizontally, vertically, or across a combination of multiple axes.

The product is with standard dimensions for coupling an electric or hydraulic motor as well as coupling a whole system to equipment. Due to its compactness, high rigidity and other mentioned advantages, a worm drive system is used in varying equipment such as mobile assembly platforms, satellite system, hydraulic loading cranes on haulage vehicles, small marine cranes, extendable rotating ladders, in wheel units of large marine portal transporters.

Coresun lies at the largest mechanical center in China,which has been engaged in producing and designing slewing bearing for the past 30 years.The company specializes in 6 types slewing bearings,the productions are widely used in engineering machinery,building machinery,metallurgical and mining machinery,shipping port machinery and so on.

Coresun company have a full assembly line production capacity from forging,heat treatment,machining process,tooth making and to finished product assembly.The series of products produced by our company have passed the quality inspection identification of the national special type mechanical part quality testing and played a leading role in the industry.Our products are sold throughout the country and exported to more than 42 countries,such as Malaysia,France,Singapore,Germany,Italy and so on.

1. Rotation 360 degrees
2. Connection of a driving motor from the left or right side
3. During installation, it is not necessary to adjust the gearing clearance; this is already set by the producer before factory
4. Simple installation and low maintenance
5. Rational space utilization
6. The gear is self-locking; therefore a brake is not necessary
7. Easy and fluent method of starting and stopping

Model Slewing Drive SC14 Brand Coresun Drive
Holding Torque 48Kn.m Tilting Moment Torque 67.8Kn.m
Self-locking Yes Gear Ratio 85:1
Outer Dia. 390mm Inner Dia. 295mm
IP Class IP65 Precision ≤0.12°

There are no special limitations of mounting angles and positions of this series of products.  It can be mounted horizontally, vertically and inclined.  Enclosed slewing drives are assembled of enclosed housing, slewing bearing, worm shaft and other parts.  Users can choose electric motors or hydraulic motors as the driving power.  It can slew 360 degrees clock-wise or otherwise.  The slewing drive is compact and it is also easy to mount and maintain in comparison with other types of driving devises.
It adopts enclosed design and the protection level can reach IP65.  It can effectively prevent dust, rain and other hostile environments.  It suits field usage such as desert, alpine and other hostile environments.
1.Products are easy to mount and maintain.
2.The design and mounting dimensions are international or domestic universal dimensions.  It is easy for the users’ replacements in the future.

Tilting Moment Torque: Torque is the load multiplied by distance between the position of load and the center of slewing bearing. If the qorque generated by load and distance is greater than the rated tilting moment torque, slewing drive will be overturned.

Radial load: Load vertical to the axis of slewing bearing

Axial load: Load parallel to the axis of slewing bearing

Holding torque:It is the reverse torque.When the drive is rotating reversely, and parts are not damaged,The maximum torque achieved is called holding torque.

Self-locking: Only when loaded, the slewing drive is not able to reverse rotate and thus called self-locking.

Coresun Drive Slewing Bearing Production Precision and Backlash Testing.Ensuring smooth operation.

Coresun Drive testing reports for WH products on measurement, material and finished production.


It is sincerely looking CHINAMFG to cooperating with you and providing the best quality product & service with all of our heart!

Slewing Bearing: Worm Gear
Static Radial Laod: 343kn
Rotary Table: Robot Arm
Application: Man Lift Crane
Tilting Moment Torque: 67.8kn.M
Static Axial Load: 920kn


Customized Request

worm gear

How does a worm gear impact the overall efficiency of a system?

A worm gear has a significant impact on the overall efficiency of a system due to its unique design and mechanical characteristics. Here’s a detailed explanation of how a worm gear affects system efficiency:

A worm gear consists of a worm (a screw-like gear) and a worm wheel (a cylindrical gear with teeth). When the worm rotates, it engages with the teeth of the worm wheel, causing the wheel to rotate. The main factors influencing the efficiency of a worm gear system are:

  • Gear Reduction Ratio: Worm gears are known for their high gear reduction ratios, which are the ratio of the number of teeth on the worm wheel to the number of threads on the worm. This high reduction ratio allows for significant speed reduction and torque multiplication. However, the larger the reduction ratio, the more frictional losses occur, resulting in lower efficiency.
  • Mechanical Efficiency: The mechanical efficiency of a worm gear system refers to the ratio of the output power to the input power, accounting for losses due to friction and inefficiencies in power transmission. Worm gears typically have lower mechanical efficiency compared to other gear types, primarily due to the sliding action between the worm and the worm wheel teeth. This sliding contact generates higher frictional losses, resulting in reduced efficiency.
  • Self-Locking: One advantageous characteristic of worm gears is their self-locking property. Due to the angle of the worm thread, the worm gear system can prevent the reverse rotation of the output shaft without the need for additional braking mechanisms. While self-locking is beneficial for maintaining position and preventing backdriving, it also increases the frictional losses and reduces the efficiency when the gear system needs to be driven in the opposite direction.
  • Lubrication: Proper lubrication is crucial for minimizing friction and maintaining efficient operation of a worm gear system. Inadequate or improper lubrication can lead to increased friction and wear, resulting in lower efficiency. Regular lubrication maintenance, including monitoring viscosity, cleanliness, and lubricant condition, is essential for optimizing efficiency and reducing power losses.
  • Design and Manufacturing Quality: The design and manufacturing quality of the worm gear components play a significant role in determining the system’s efficiency. Precise machining, accurate tooth profiles, proper gear meshing, and appropriate surface finishes contribute to reducing friction and enhancing efficiency. High-quality materials with suitable hardness and smoothness also impact the overall efficiency of the system.
  • Operating Conditions: The operating conditions, such as the load applied, rotational speed, and temperature, can affect the efficiency of a worm gear system. Higher loads, faster speeds, and extreme temperatures can increase frictional losses and reduce overall efficiency. Proper selection of the worm gear system based on the expected operating conditions is critical for optimizing efficiency.

It’s important to note that while worm gears may have lower mechanical efficiency compared to some other gear types, they offer unique advantages such as high gear reduction ratios, compact design, and self-locking capabilities. The suitability of a worm gear system depends on the specific application requirements and the trade-offs between efficiency, torque transmission, and other factors.

When designing or selecting a worm gear system, it is essential to consider the desired balance between efficiency, torque requirements, positional stability, and other performance factors to ensure optimal overall system efficiency.

worm gear

How do you retrofit an existing mechanical system with a worm gear?

When retrofitting an existing mechanical system with a worm gear, several considerations need to be taken into account. Here’s a detailed explanation of the retrofitting process:

  1. Evaluate the existing system: Before proceeding with the retrofit, thoroughly assess the existing mechanical system. Understand its design, function, and limitations. Identify the specific reasons for considering a worm gear retrofit, such as the need for increased torque, improved efficiency, or enhanced precision.
  2. Analyze compatibility: Evaluate the compatibility of a worm gear with the existing system. Consider factors such as available space, structural integrity, alignment requirements, and the load-bearing capacity of the system. Ensure that the addition of a worm gear will not compromise the overall performance or safety of the system.
  3. Select the appropriate worm gear: Based on the requirements and constraints of the retrofit, choose a suitable worm gear. Consider factors such as gear ratio, torque capacity, efficiency, backlash, and mounting options. Select a worm gear that matches the specific needs of the retrofit and is compatible with the existing system.
  4. Modify or adapt the system: Depending on the compatibility analysis, it may be necessary to modify or adapt certain components of the existing system to accommodate the worm gear. This can involve making adjustments to shafts, bearings, housings, or other mechanical elements. Ensure that any modifications or adaptations are carried out with precision and adhere to industry standards.
  5. Install the worm gear: Install the selected worm gear into the modified or adapted system. Follow the manufacturer’s instructions and guidelines for proper installation. Pay attention to torque specifications, lubrication requirements, and any specific assembly procedures. Ensure that the worm gear is securely mounted and aligned to minimize misalignment and maximize performance.
  6. Test and optimize: After the installation, thoroughly test the retrofitted system to ensure its functionality and performance. Conduct tests to verify torque transmission, efficiency, backlash, noise levels, and any other relevant parameters. Monitor the system during operation and make any necessary adjustments or optimizations to fine-tune its performance.
  7. Document and maintain: Document the retrofitting process, including any modifications, adjustments, or optimizations made to the existing system. Keep records of installation procedures, test results, and maintenance activities. Regularly inspect and maintain the retrofitted system to ensure its continued performance and reliability.

It’s important to note that retrofitting an existing mechanical system with a worm gear requires expertise in mechanical engineering and an understanding of the specific system requirements. If you lack the necessary knowledge or experience, it is advisable to consult with professionals or engineers specializing in power transmission systems to ensure a successful retrofit.

worm gear

Understanding Worm Gears and Their Operation

A worm gear is a type of mechanical gear that consists of a threaded screw-like component (called the worm) and a toothed wheel (called the worm gear). It is used to transmit motion between non-intersecting and perpendicular shafts. Here’s how it works:

The worm, typically in the form of a cylindrical rod with a helical thread, meshes with the teeth of the worm gear. When the worm is rotated, its threads engage with the teeth of the worm gear, causing the gear to rotate. The direction of rotation of the worm gear is perpendicular to the axis of the worm.

One significant feature of worm gears is their ability to provide high gear reduction ratios. The number of teeth on the worm gear relative to the number of threads on the worm determines the reduction ratio. This makes worm gears suitable for applications where high torque and low-speed rotation are required.

Worm gears are commonly used in various mechanical systems, such as conveyor systems, lifts, automotive steering mechanisms, and more. Their unique design also provides a self-locking feature: when the system is not actively rotating the worm, the gear cannot easily backdrive the worm due to the angle of the threads, providing mechanical advantage and preventing reverse motion.

China Standard Sc14 Slewing Drive Gear Motor for Aerial Working Platform bevel gearboxChina Standard Sc14 Slewing Drive Gear Motor for Aerial Working Platform bevel gearbox
editor by CX 2023-09-18