Bearing Types and Load Support Capabilities

Bearings are machine elements that support relative motion between parts while reducing friction. They are designed to handle different types of forces, primarily classified as radial loads and axial (or thrust) loads.

• Radial Load: A force acting perpendicular to the axis of rotation of the bearing. Think of the weight of a wheel pushing down on its axle.
• Axial Load (Thrust Load): A force acting parallel to the axis of rotation. Think of the force pushing or pulling along the shaft, like in a propeller or a screw jack.

Different types of bearings are engineered to support different combinations of these loads efficiently.

Analyzing Bearing Types for Radial Load Support

Let's look at the bearing types mentioned in the options and their ability to support radial loads:

• Taper roller bearing: These bearings use tapered rollers and raceways. They are designed to carry both significant radial loads and axial loads. They are commonly used in car wheels and other heavy-duty applications.
• Deep groove ball bearing: This is one of the most common types of bearings. They are primarily designed to support radial loads, but they can also support moderate axial loads in both directions.
• Angular contact bearing: These bearings have raceways that are offset relative to each other. This configuration allows them to support both radial loads and high axial loads in one direction (or both directions if used in pairs).
• Thrust ball bearing: Thrust ball bearings are specifically designed to support purely axial loads. They consist of two rings (washers) and balls held in a cage between them. The contact surfaces are perpendicular to the axis of rotation. Due to their design, they are essentially incapable of supporting any significant radial load. Applying a radial load can cause the balls to be pushed out or the washers to deform, leading to failure.

Identifying Bearings Incapable of Supporting Radial Loads

Based on the analysis of the different bearing types:

• Taper roller bearings can support radial loads.
• Deep groove ball bearings can support radial loads.
• Angular contact bearings can support radial loads.
• Thrust ball bearings are primarily designed for axial loads and cannot support significant radial loads.

Therefore, the bearing type listed that is incapable of supporting radial loads is the thrust ball bearing.