Large Spherical Thrust Bearing

Large spherical thrust bearings reduce friction and allow for higher speed capabilities than other types of roller bearings. Their separable design allows for easier mounting and maintenance in heavy machinery.

NEWORLD’s large spherical thrust bearings have excellent load-carrying capacity for both radial and thrust loads in one direction. They also feature self-aligning capabilities to accommodate misalignment.

Design

A large spherical thrust bearing is designed to carry heavy loads in a single direction. The spherical shape reduces friction between the bearing and the shaft, resulting in smooth operation and extended life. This type of thrust bearing is also self-aligning, which helps to compensate for misalignment caused by mounting errors or changes in environmental conditions.

These bearings are available in two designs: a cylindrical bore and a split spherical thrust bearing. A split design is ideal when the outer raceway of a conventional spherical bearing is unsuitable for swaging, due to a flange or wide overhang on one side.

A pressed steel cage holds the bearings at the right spot between the raceways, and oil lubrication is recommended for high-speed applications. In addition to thrust capacity, these bearings have radial load capacity as well. If you are not sure which large spherical thrust bearing is best for your application, contact NEWORLD’s application engineering service. They will determine savings potentials quickly and free of charge.

Materials

Unlike thrust ball bearings, which use bearing balls in a ring, spherical roller thrust bearings can handle both axial and radial loads. They also have a large load carrying capacity and a self-aligning design, making them insensitive to shaft deflection or misalignment.

They are available in a variety of materials including steel, beryllium copper and PTFE. The choice of material depends on the application requirements and manufacturing volume. Higher volume series have cages made from stamped sheet metal and lower volume types have machined cages.

When installing a large spherical thrust bearing, it is important to avoid hammering the bearing rings as this can cause fracture of the outer ring. It is also necessary to install the bearing in such a manner that it can accommodate the effect of temperature rise on the axial clearance between the inner and outer rings. This can be achieved by using a sleeve with a groove that is staking into the rod end body.

Installation

A large spherical thrust bearing can take axial loads bi-directionally. They consist of a shaft washer (inner ring), a housing washer, asymmetrical rollers and a cage. During installation, the bearing must be properly sized and aligned.

The bearing is installed in a rod end body and retained by staking or other means. This type of installation requires a good axial load distribution and moderate strength.

NEWORLD spherical roller thrust bearings have a strong cage design to tolerate high temperatures and work with all lubricants. To achieve this, the shaft and housing washers should be supported on their entire side faces (da min & Da max).

The amount of axial clearance can be measured using a dial indicator. First, fix the dial indicator on the fuselage or bearing seat, then touch it against the smooth surface of the shaft and push it left and right along the axial direction. The maximum swing of the dial indicator indicates the axial clearance value.

Maintenance

In order to keep large spherical thrust bearings operating smoothly, it is essential that they are properly maintained. This can be done by regular inspections, performing routine maintenance, and following proper dismounting procedures. Misalignment: If the bearings are not correctly aligned, it can result in uneven load distribution and premature wear. Regular inspections and proper installation can prevent this issue. Excessive heat: High operating temperatures can degrade the lubricant and increase friction and wear. This can be prevented by employing proper cooling mechanisms and regularly lubricating the bearings. Contamination: Dust, dirt and debris can reduce bearing performance by entering the oil and causing damage. Regular cleaning and filtration can mitigate this problem.

Random scratches on the journal, collar or runner surfaces may indicate excessive end play. This can be caused by improper handling during installation or disassembly. NEWORLD recommends using special tools like bearing pullers, fitting tool kits and oil injection lubrication kits for fast and safe mounting and dismounting of these bearings.