Product Description

571.25.355 External Gear Slewing Bearing Without Gear Introduction:
It refers to a type of bearing used in heavy machinery, such as cranes, excavators, and wind turbines, where the gear teeth are absent. Slewing bearings are designed to handle axial, radial, and moment loads simultaneously, allowing rotational movement while supporting heavy loads.
571.25.355 External Gear Slewing Bearing Without Gear key features:

  1. Smooth Rotation: Without teeth, the bearing can rotate more smoothly, reducing friction and wear, which can extend the bearing’s lifespan.

  2. Flexibility: Toothless slewing bearings offer more flexibility in terms of mounting and alignment. They can be integrated into systems where gear teeth might interfere with other components or mechanisms.

  3. Cost-Effectiveness: Toothless designs can be simpler to manufacture and maintain, potentially reducing production costs and maintenance requirements.

  4. Noise Reduction: Toothless slewing bearings may produce less noise during operation compared to those with gear teeth, which can be advantageous in certain applications, particularly in environments where noise levels need to be minimized.

571.25.355 External Gear Slewing Bearing Without Gear Display:

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Standard or Nonstandard: Standard
Feature: Corrosion-Resistant
Sealing Gland: Sealed On Both Sides
Rolling-Element Number: Single-Row
Roller Type: Straight Raceway
Material: Bearing Steel
Samples:
US$ 10/Piece
1 Piece(Min.Order)

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Customization:
Available

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slewing bearing

How do Slewing Bearings Contribute to the Smooth Rotation of Cranes and other Heavy Machinery?

Slewing bearings play a vital role in ensuring the smooth and efficient rotation of cranes and other heavy machinery that require controlled movement. Their design and functionality are specifically tailored to handle the unique challenges posed by such applications. Here’s how slewing bearings contribute to the smooth rotation of cranes and heavy machinery:

  • Load Handling:

Crane operations involve lifting and moving heavy loads. Slewing bearings are designed to carry substantial axial, radial, and moment loads simultaneously. This load-handling capacity allows cranes to lift and transport heavy objects with precision.

  • Smooth Rotation:

Slewing bearings provide a smooth interface between the upper structure (superstructure) and the lower structure (substructure) of the machinery. This allows for controlled and precise rotation of the upper structure, enabling cranes to maneuver smoothly during lifting, loading, and unloading operations.

  • Efficient Torque Transmission:

During crane rotation, torque generated by the motor is transmitted through the slewing bearing to the upper structure. The bearing’s design ensures efficient torque transmission, minimizing energy losses and facilitating smooth rotation even under heavy loads.

  • Low Friction and Wear:

Slewing bearings are engineered to minimize friction and wear. This reduces the energy required for rotation and prevents premature wear that could affect the bearing’s performance and longevity.

  • High Stiffness:

Slewing bearings exhibit high stiffness, which contributes to the stability of the machinery during rotation. This stiffness ensures minimal deflection and maintains precise alignment, essential for safe and controlled movement.

  • Uniform Load Distribution:

The raceway design of slewing bearings promotes uniform load distribution among rolling elements. This prevents stress concentrations and uneven wear, enhancing the bearing’s durability and contributing to smooth operation.

  • Slow and Controlled Movement:

Crane operations often require slow and controlled rotation, especially when positioning heavy loads. Slewing bearings facilitate this type of movement, allowing operators to make precise adjustments.

  • Customization for Specific Applications:

Slewing bearings can be customized to match the specific requirements of different crane designs and applications. This customization ensures optimal performance and longevity in various operational scenarios.

In summary, slewing bearings are essential components that enable the smooth and precise rotation of cranes and heavy machinery. Their load-carrying capacity, low friction, high stiffness, and ability to transmit torque efficiently contribute to the reliable and controlled movement required for various lifting and loading operations.

slewing bearing

Can you Provide Examples of Industries where Slewing Bearings are Crucial Components?

Slewing bearings play a vital role in various industries due to their ability to handle complex loads and rotational movements. Here are some examples of industries where slewing bearings are crucial components:

  • Construction Industry:

Slewing bearings are used in construction machinery such as cranes, excavators, and concrete pumps. They enable the movement of heavy loads, contributing to efficient construction operations.

  • Wind Energy Industry:

In wind turbines, slewing bearings allow the rotor blades and nacelle to rotate for optimal wind capture. Their durability and load-bearing capacity are essential for reliable wind turbine operation.

  • Mining Industry:

Slewing bearings are employed in mining equipment like stacker-reclaimers and conveyor systems. They facilitate the movement of large quantities of materials, contributing to efficient mining operations.

  • Marine Industry:

Slewing bearings are used in ship cranes, davits, and other marine equipment for cargo handling and maintenance tasks. They play a crucial role in maritime operations.

  • Aerospace Industry:

Slewing bearings find applications in aerospace equipment like aircraft landing gear systems, satellite antenna deployment mechanisms, and more.

  • Manufacturing Industry:

Industrial robots and automation systems utilize slewing bearings for precise rotational movement, enhancing manufacturing processes.

  • Material Handling Industry:

Slewing bearings are crucial in material handling equipment such as conveyor systems, container cranes, and automated storage and retrieval systems.

  • Energy Industry:

In the energy sector, slewing bearings are used in equipment such as solar trackers, tidal energy platforms, and hydroelectric power plants.

  • Medical Industry:

Some medical imaging equipment like CT scanners and MRI machines use slewing bearings for rotational movement, contributing to accurate diagnostics.

  • Entertainment Industry:

In theme parks and entertainment venues, slewing bearings are used in amusement rides that require controlled rotational movement.

  • Automotive Industry:

Slewing bearings can be found in various automotive applications, such as car turntables and components in heavy-duty vehicles.

These are just a few examples of the diverse industries where slewing bearings are crucial components, contributing to the efficient operation of machinery and equipment.

slewing bearing

What is a Slewing Bearing and How Does It Work?

A slewing bearing, also known as a turntable bearing, is a specialized type of rolling-element bearing designed to handle axial, radial, and moment loads simultaneously. It allows rotational movement between two parts while supporting the loads applied to them. Slewing bearings are commonly used in various applications such as cranes, construction equipment, wind turbines, and industrial machinery.

At its core, a slewing bearing consists of multiple components, including an outer ring, an inner ring, rolling elements (balls or rollers), and in some designs, a gear or teeth arrangement. The outer ring is typically stationary and mounted to a fixed structure, while the inner ring is connected to the rotating part. The rolling elements provide smooth movement between the two rings, enabling rotation.

Slewing bearings work by minimizing friction and distributing loads effectively across the rolling elements. When a rotational force is applied to the inner ring, the rolling elements facilitate the smooth rotation of the inner ring relative to the outer ring. The rolling elements are positioned within raceways or grooves in the rings, ensuring proper contact and load distribution.

The addition of gears or teeth to the slewing bearing design enables the transmission of torque between the inner and outer rings. This feature is particularly useful when precise rotation control is required, as seen in applications like cranes and heavy machinery.

In summary, a slewing bearing functions as a rotational joint that can support various loads and movements. Its design, which includes rolling elements and optional gear systems, allows it to manage axial, radial, and moment loads while facilitating smooth rotation between connected parts.

China Best Sales Compact Design Versatility 010.25.355 External Gear Slewing Bearing Without Gear   with Good qualityChina Best Sales Compact Design Versatility 010.25.355 External Gear Slewing Bearing Without Gear   with Good quality
editor by CX 2024-05-14