A Guide to Double Tapered Roller Bearings

Double tapered roller bearings are a popular type of rolling-element bearing used in many industrial applications. These tapered rollers are able to handle radial and axial forces more effectively than other types of rolling-element bearings. They are also less expensive to purchase and install than other types of rollers.

They are also more stable and durable than other types of bearings. This makes them ideal for applications that require a reliable bearing solution.

In most cases, a single row of tapered rollers is enough to handle all the radial and axial loads in a rotating system. However, in some cases, you may need a larger bearing. For these situations, a double-row tapered roller bearing is an ideal solution.

These bearings are typically made of steel, although they can be made from a variety of materials. They are designed to withstand both radial and axial load, and the inner ring has been specially designed to reduce friction and improve efficiency.

There are two main components in a double tapered roller bearing: the outer ring and the cup. The outer ring contains the rollers and their races, which help to distribute the load evenly and reduce friction.

The inner ring, or cone, is the component that holds the rollers and guides them during rotation. This helps to evenly distribute the load, reduce friction, and ensure a high level of performance.

Angular misalignment can significantly affect the contact loads on the outer and inner ring of the bearing, which means that it is important to choose a bearing with an appropriate angle. This can vary depending on the type of load that you need to support, as well as the angular position of the shaft.

It is also essential to find a bearing with a suitable preload setting. A properly controlled preload can enhance the life of the bearing and minimize parasitic energy losses. Too much preload, however, can lead to increased wear and damage, which can be avoided by determining the correct setting before installing the bearing.

Static load capacity - ISO 281 and ISO 76

The static load capacity of a bearing depends on its internal dimensioning. It is important to optimize the roller infill and the flange to maximize its ability to withstand a given combination of radial and axial loads.

This can be done by calculating the load-carrying capacity of the system with the correct axial and radial loads and then optimizing the dimensions of the bearing to meet that load. This gives the maximum bearing life and also prevents stress peaks from occurring, which can decrease material loading.

These calculations are based on the Newton-Raphson method, which uses an iterative process to determine the characteristics of a system in various stages of deformation. The analysis is conducted under several representative load scenarios, including asymmetrical axial and radial loads, and angular misalignment.

The results show that the axial loads and angular misalignment have a large influence on the resisting moment, contact loads, and fatigue life of a double-row tapered roller bearing. This is because asymmetrical axial and radial loading causes angular misalignment, which can increase the torsional stiffness of the bearing.