What is a slewing drive?

A slewing drive is an integrated heavy-duty rotary transmission component that combines a slewing bearing, a geared motor, and a gear set.  With the slewing bearing as the core load-bearing foundation, it uses a motor to drive gear meshing to achieve low-speed, heavy-load, and high-precision rotational motion of the equipment's rotating mechanism.  It simultaneously performs both load-bearing (radial/axial/tilting loads) and transmission functions, and is an integrated solution that replaces the traditional separate "bearing + reducer + bracket" structure.

This component integrates support and transmission, eliminating complex assembly and significantly improving the rigidity and coaxiality of the rotating mechanism. It is widely used in engineering machinery, port machinery, new energy equipment, and other equipment requiring heavy-duty rotation.

What are the components of a slew drive?

A slewing drive is an integrated system comprising a slewing  bearing, drive motor, reduction gear, housing, seals, and bearing lubrication system. It is responsible for both rotational drive and load bearing.

The slewing bearing (gear ring bearing) is the core load-bearing component of the rotary drive, simultaneously bearing axial force, radial force, and overturning moment. It is typically an external or internal gear bearing that meshes with the drive gear.

The drive motor provides the primary power for the slewing drive. Commonly used motors include DC motors, AC motors, servo motors, stepper motors, and hydraulic motors.

The most common reduction gear is the worm gear, but gear reduction and planetary reduction are also used; its function is to reduce speed and increase torque.

The housing/box serves as the base for mounting the motor, worm gear, and bearings, ensuring structural rigidity and sealing.

Seals are crucial components of the slewing drive, preventing dust and water ingress and protecting the internal lubrication. They are vital to the efficiency and lifespan of this integrated system.

The bearing lubrication system includes grease/oil channels and nozzles, ensuring long-term reliable operation.

LTZC slewing drive manufacturer

High Torque Output Capacity: A single slewing drive can output torque ranging from 3,000 to 150,000 N·m, meeting the heavy-duty slewing requirements of hoisting, wind power, and ports.

High Transmission Efficiency Design: Utilizing a high-precision worm gear/gear transmission system, the transmission efficiency reaches 85%–92%, significantly reducing energy consumption.

High-Precision Slewing Control: Slewing positioning accuracy ≤ 0.1°, repeatability ≤ 0.05°, achieving smooth and precise slewing.

High-Precision Slewing Bearing: Built-in LTZC independently developed slewing bearingwith a raceway surface hardness of HRC58–62 and a load capacity of 500–3000 kN.

View LTZC Slewing Bearing

Multiple Slewing Drive Types: LTZC slewing drives are available in various design structures, including an overall enclosed design with IP66/IP67 protection ratings, effectively preventing dust, water, and sediment intrusion. Open slewing drives and vertical slewing drives are also available.

Superior Impact Resistance:Optimized tooth surface contact and preload structure adapt to frequent start-stop and impact load conditions.

Multiple Model Customization Capabilities: Supports in-depth customization of axial load, radial load, overturning moment, and mounting interface. It can also replace internationally renowned brand rotary drives, perfectly matching customer equipment structures. If specific data is unclear, LTZC can send professional technicians to conduct on-site measurements and provide CAD drawings.

Stringent Quality Certification System: Certified by ISO 9001/14001/45001, CCS, BV, ABS, and other international certifications.

Wide Application Areas: Suitable for heavy-duty rotating equipment such as solar trackers, wind power systems, cranes, aerial platforms, and port machinery.

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