What details do I need to pay attention to when installing cross cylindrical roller bearings?

What is cross cylindrical roller slewing ring

The cross cylindrical roller slewing ring is composed of two seats, the internal cylindrical rollers are arranged in a cross and are separated and positioned by the isolation block, and the unique structure of the roller in contact with the raceway line makes it able to bear strong axial force, radial force and overturning moment at the same time, with the advantages of high load bearing and high precision; It can realize the stable connection and flexible rotation of relatively rotary moving parts, and is widely used in hoisting machinery, construction machinery, port machinery and industrial robots and other equipment with high requirements for bearing capacity and rotation accuracy, providing a strong guarantee for the stable and reliable operation and efficient work of the equipment.

Features of cross cylindrical roller slewing rings

High load-bearing capacity: The cylindrical roller structure with cross arrangement is adopted, and the rollers are in linear contact with the raceway, which can withstand greater axial force, radial force and overturning moment than the point-contact structure, which can meet the needs of heavy equipment and high-load conditions.

High precision: the precise arrangement of the rollers and the positioning of the isolation block make the slewing ring maintain a high rotation accuracy during operation, effectively reduce the shaking and deviation during operation, and can meet some equipment with high requirements for motion accuracy, such as precision machine tools, radar antenna bases, etc.

Compact structure: The structural design of this slewing ring is more compact, occupies less space, and has more advantages in the space layout of the equipment, which is conducive to the miniaturization and lightweight design of the equipment, especially suitable for occasions with limited space but high bearing capacity.

Easy installation: its structural form makes the installation process relatively simple, generally only need to connect the two seat rings with the fixed parts and rotating parts of the equipment respectively through bolts, which can effectively shorten the assembly time of the equipment and improve the production efficiency.

High rigidity: Due to the reasonable arrangement of the rollers and the design of the seat ring, the whole has high rigidity, and the deformation is small when bearing the load, which can ensure the stability of the equipment during operation and prolong the service life of the equipment.

Good interchangeability: The standardized design and manufacture make the cross cylindrical roller slewing ring have good interchangeability, when a component is damaged, it is easy to replace the corresponding part, reducing the maintenance cost and downtime of the equipment.

Wear resistance: The selection of high-quality materials and advanced heat treatment technology makes the roller and raceway surface have high hardness and wear resistance, which can maintain good performance in long-term operation and reduce the impact of wear.

Strong adaptability: It can adapt to different working environments and working conditions, whether it is in high temperature, low temperature, humid or dusty and other harsh environments, as long as appropriate protective measures are taken, it can work reliably and has strong environmental adaptability.

What details do I need to pay attention to when installing cross cylindrical roller bearings?

When installing cross cylindrical roller bearings, the following details require special attention:

Clean installation environment: The installation environment should be kept clean to avoid dust, debris, etc. from entering the bearing. Before installation, the installation site, tools and the bearing itself should be thoroughly cleaned to remove impurities such as oil stains and iron filings to prevent them from affecting the normal operation and service life of the bearing.

Parts inspection: Carefully inspect all parts of the bearing, including the inner ring, outer ring, rollers, cage, etc., to ensure that there are no cracks, damage, deformation, rust and other defects. At the same time, check the dimensional accuracy, shape accuracy and surface roughness of the shaft and bearing seat that fit with the bearing to ensure that their fit with the bearing meets the requirements.

Fitting accuracy: Strictly control the matching accuracy of bearings, shafts and bearing seats. Excessive interference fit can make it difficult to mount the bearing and may even damage the bearing; If the interference fit is too small, the bearing will loosen during operation and affect the stability of the equipment. The clearance fit should also be appropriate, otherwise it will affect the rotational accuracy and load-bearing capacity of the bearing. Before installation, the dimensions of the shaft and housing should be accurately measured according to the design requirements, and trimmed or adjusted if necessary.

Use of installation tools: Use suitable installation tools, such as special press-in tools, heating equipment, etc. Avoid using hammers and other direct strikes on the bearing to avoid damage to the bearing parts. If the hot charging method is used, the heating temperature should be controlled within a reasonable range, generally not exceeding 120°C, to prevent the performance of the bearing material from changing. The heating process should be uniform to ensure that all parts of the bearing expand consistently.

Mounting direction: Pay attention to the mounting direction of the bearing and make sure that it is installed correctly. Cross cylindrical roller bearings usually have specific mounting orientation requirements to ensure proper contact between the rollers and the raceway and even distribution of the load. When installing, it should be operated in accordance with the identification on the bearing or the equipment manual, and avoid reversing it.

Installation sequence: For complex installation structures, follow the correct installation sequence. For example, when installing multiple bearings or cooperating with other components, the basic components should be installed first, and then the bearings and other related components should be installed in turn to ensure that the installation accuracy and mutual position relationship between the components meet the requirements.

Bolt tightening: If the bearing is secured by a connector such as a bolt, tighten the bolts according to the specified torque and sequence. The tightening force should be uniform to avoid bearing deformation or uneven force due to inconsistent bolt tightening force. At the same time, it is necessary to use a suitable torque wrench for operation, and calibrate the torque wrench regularly to ensure the accuracy of the torque.

Sealing installation: Properly install sealing devices, such as sealing rings, gaskets, etc. Seals should be installed in an accurate position to avoid twisting, deforming, or damage. During the installation process, attention should be paid to protecting the surface of the seal to prevent it from being scratched or scratched, so as to ensure good sealing performance and prevent lubricating oil leakage and external impurities from entering the bearing.

Post-installation inspection: After the installation is completed, the bearings are fully inspected. Check whether the mounting position of the bearing is correct and whether there is any loosening phenomenon; Manually rotate the bearing to check whether its rotation is flexible, whether there is any stuckness, abnormal noise or abnormal resistance; Use a measuring tool to check whether the clearance of the bearing is within the specified range, and if there is any deviation, it needs to be adjusted in time.

Cross cylindrical roller slewing ring supplier

As a well-known supplier of slewing bearings with 30 years’ experience, LTZC bearings is committed to providing slewing bearings with high quality and low price. The specific price needs to be comprehensively evaluated according to the size, load, material and accuracy requirements of the bearings. Please contact us if necessary.