They create very less noise due to point contact.

Mechanical Engineering: Deep Groove Ball Bearings and Noise

Deep groove ball bearings are widely used in mechanical systems to support radial and axial loads. They consist of an inner ring, an outer ring, a set of steel balls, and a cage to keep the balls separated. These bearings are known for their high rotational speed capabilities, reliability, and relatively low friction.

Noise Generation in Deep Groove Ball Bearings

When it comes to noise generation, deep groove ball bearings can produce varying levels of noise depending on several factors. These factors include the design, materials used, lubrication, operating conditions, and the application itself.

Factors Affecting Noise Generation

1. Design: The design of the bearing, such as the number and size of the balls, the clearance between the balls and raceways, and the type of cage, can influence the noise level. Bearings with a higher number of smaller balls tend to produce less noise compared to bearings with fewer larger balls.

2. Materials: The choice of materials for the rings, balls, and cages can affect the noise level. High-quality materials with good surface finish and hardness can reduce noise generation.

3. Lubrication: Proper lubrication is crucial for minimizing noise. Inadequate lubrication can lead to increased friction and wear, resulting in higher noise levels. The type and amount of lubricant used should be appropriate for the application.

4. Operating Conditions: The operating conditions, such as speed, load, and temperature, can impact the noise level of the bearing. Higher speeds and heavier loads may lead to increased noise.

Noise Level of Deep Groove Ball Bearings

Deep groove ball bearings are generally known for their relatively low noise levels. Compared to other types of bearings, such as roller bearings, they tend to produce less noise due to their design and rolling element configuration. The rolling balls in deep groove ball bearings distribute the load more evenly, reducing vibration and noise.

However, it is important to note that deep groove ball bearings can still generate noise, especially in certain applications or operating conditions. Factors such as misalignment, inadequate lubrication, contamination, or excessive loads can increase the noise level.

Therefore, in general, the statement "They create very less noise" (option B) is a correct answer. However, it is essential to consider the specific application and operating conditions to accurately assess the noise level of deep groove ball bearings.