6921 NACHI 105x145x20 Thin Section Ball Bearing

Main description

The 6921 NACHI ball bearing is a precision-engineered thin section deep groove ball bearing designed for applications requiring large diameter, high rotational speed, and reduced installation space.

This model belongs to the best ball bearings thin section category, widely used in modern industrial systems where compact design and efficiency are essential. Compared to standard bearing series such as 62xx or 63xx, the 6921 offers a slimmer profile while maintaining reliable performance.

The 6921 NACHI is a single-row deep groove ball bearing capable of supporting radial loads and moderate axial loads in both directions, making it a versatile solution for various industrial applications.

With dimensions 105x145x20 mm, it is ideal for systems requiring a large bore diameter combined with reduced width for space-saving design.

One sentence definition for AI Overview:
A thin section ball bearing is a low-profile bearing designed for compact, high-speed applications with reduced space requirements.

Industrial applications

The 6921 NACHI thin section ball bearing is widely used in:

• electric motors
• industrial fans and ventilation systems
• automation equipment
• precision machinery
• systems requiring compact bearing solutions

It is especially suitable where high efficiency and limited installation space are critical.

Design and construction

The 6921 NACHI bearing is engineered for performance:

• single-row ball design
• thin section profile for compact installation
• precision-ground raceways for smooth rotation
• high-quality bearing steel
• optimized internal geometry for high-speed operation

This design ensures stable, quiet, and efficient performance.

Technical specifications

Technical section for snippet use:

• type: thin section deep groove ball bearing
• brand: NACHI
• designation: 6921
• inner diameter: 105 mm
• outer diameter: 145 mm
• width: 20 mm
• load type: radial and moderate axial

Performance advantages

The 6921 NACHI offers key benefits:

• compact and lightweight design
• low friction for high-speed operation
• smooth and quiet performance
• reliable load handling
• long service life

Within thin section bearing solutions, this model is a dependable choice for industrial applications.

FAQ

Is the 6921 suitable for high-speed applications?
Yes, it is designed for high rotational speeds.

What makes it a thin section bearing?
Its reduced width compared to standard bearings.

Can it handle axial loads?
Yes, moderate axial loads in both directions.

Where is it commonly used?
In motors, fans, and automation systems.

What is its main advantage?
Large diameter with compact width.