Advantages:
Weight and volume reduction: Eliminating the inner ring reduces the overall weight and volume of the bearing. Simplicity of construction: The manufacturing process is simplified.
Cost reduction: May lead to a reduction in production costs in some cases.
Disadvantages:
Requires high precision in shaft construction: The shaft surface must be very precise and smooth to function properly as the inner ring. Reduced service
life: If the shaft surface is scratched or damaged, the service life of the bearing is reduced.
Limitations on application: This type of design may not be suitable for all applications and has limitations on the type and amount of load that can be tolerated.
Applications:
Small electric motors: Used in some small electric motors to reduce weight and volume.
Hand tools: In some hand tools that require precision and lightness. Special applications: In some special applications that require a unique design.
Note: This type of design is usually used in light and low-speed applications, and for heavy loads and high speeds, standard double-row deep groove ball bearings with a separate inner ring are recommended.