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Deep Groove Ball Bearings

Deep groove ball bearings are one of the most widely used rolling bearing types, featuring a compact design, smooth operation, low friction, and suitability for high-speed applications. The precision raceway design allows the bearing to support radial loads and limited axial loads in both directions, ensuring stable and reliable performance.
Lumi offers a full range of single row deep groove ball bearings, available in multiple sizes and sealing options (open type, ZZ metal shields, and 2RS rubber seals), with various tolerance classes and lubrication options. These bearings are widely used in electric motors, home appliances, automation equipment, and automotive components.
Lumi also provides comprehensive OEM / ODM customization services, including customized internal clearance, material selection (bearing steel, stainless steel), sealing design, and grease options to meet specific application requirements.

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Deep Groove Ball Bearings

Deep Groove Ball Bearings: Performance & Advantages

Optimized internal geometry and lightweight design deliver stable, high-speed rotation in compact systems.

High-Speed Performance

Precision raceway finishing and carefully controlled internal clearance minimize friction and vibration for smooth, quiet operation.

Low Friction & Low Noise

High-quality materials combined with strict manufacturing control help reduce wear and ensure long-term, reliable performance.

Long Service Life

Designed to handle light to moderate radial loads, miniature ball bearings maintain stability within compact structural designs.

Stable Radial Load Support

Available in sealed or shielded configurations with pre-lubrication, reducing maintenance needs in enclosed or hard-to-access systems.

Maintenance-Free Options

Deep Groove Ball Bearings: Structure

Deep groove ball bearings consist of an inner ring, outer ring, balls, and cage. Each component is precisely designed and manufactured to ensure smooth operation, high-speed performance, and long service life.

Key Structural Elements:

• Inner & Outer Rings: Precision deep raceway design ensures smooth rolling motion and supports radial loads with limited axial loads in both directions.
• Balls: High-quality balls provide uniform load distribution, reduce friction and noise, and enable high-speed operation.
• Cage: Guides the balls accurately, minimizing friction and heat generation for stable performance at high speeds.
• Seals / Shields (Optional): Available in open, ZZ metal shield, and 2RS rubber seal configurations to protect against contamination and extend bearing life.

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Deep Groove Ball Bearings: Design & Mounting Configurations

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Flanged Design:

Flanged miniature ball bearings feature an integrated flange on the outer ring, providing accurate axial positioning and preventing axial movement during installation and operation. This design simplifies housing construction and reduces the need for additional positioning components, making it ideal for space-limited and precision-aligned applications.

Key Benefits:

• Accurate axial location within the housing
• Simplified installation and improved assembly efficiency
• Enhanced stability in compact structures
• Available in chrome steel and stainless steel materials

Non-Flanged Design:

Non-flanged miniature ball bearings use a standard cylindrical outer ring design, offering greater flexibility for applications where axial positioning is achieved through external components. This configuration is suitable for a wide range of housings and provides reliable performance in standard mounting arrangements.

Key Benefits:

• Flexible mounting with external axial positioning
• Compatible with a wide range of housing designs
• Suitable for standard assembly and alignment methods
• Available in chrome steel and stainless steel materials

Flanged Design:

Flanged miniature ball bearings feature an integrated flange on the outer ring, providing accurate axial positioning and preventing axial movement during installation and operation. This design simplifies housing construction and reduces the need for additional positioning components, making it ideal for space-limited and precision-aligned applications.

Key Benefits:

• Accurate axial location within the housing
• Simplified installation and improved assembly efficiency
• Enhanced stability in compact structures
• Available in chrome steel and stainless steel materials

Non-Flanged Design:

Non-flanged miniature ball bearings use a standard cylindrical outer ring design, offering greater flexibility for applications where axial positioning is achieved through external components. This configuration is suitable for a wide range of housings and provides reliable performance in standard mounting arrangements.

Key Benefits:

• Flexible mounting with external axial positioning
• Compatible with a wide range of housing designs
• Suitable for standard assembly and alignment methods
• Available in chrome steel and stainless steel materials

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Deep Groove Ball Bearings: Sealing Configurations

Open Type

Open bearings are designed without seals or shields, offering the lowest friction and highest speed capability. They are suitable for clean environments where external lubrication is available.

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Shielded Type (ZZ)

ZZ bearings are equipped with metal shields on both sides to protect against dust and solid contaminants while retaining grease. They offer a balance between speed performance and contamination resistance.

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Sealed Type (2RS)

2RS bearings feature rubber seals on both sides, providing enhanced protection against moisture, dust, and contaminants. They are pre-lubricated and require minimal maintenance.

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Open Type

Open bearings are designed without seals or shields, offering the lowest friction and highest speed capability. They are suitable for clean environments where external lubrication is available.

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Shielded Type (ZZ)

ZZ bearings are equipped with metal shields on both sides to protect against dust and solid contaminants while retaining grease. They offer a balance between speed performance and contamination resistance.

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Sealed Type (2RS)

2RS bearings feature rubber seals on both sides, providing enhanced protection against moisture, dust, and contaminants. They are pre-lubricated and require minimal maintenance.

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Deep Groove Ball Bearings: Materials & Bearing Options

Chrome Steel (GCr15 / AISI 52100)

Chrome steel miniature ball bearings offer high hardness, excellent fatigue resistance, and stable running performance. They are suitable for high-speed and low-noise applications operating in clean or controlled environments.

AISI 440C/ 420 / 304 / 316

Stainless steel miniature ball bearings provide corrosion resistance for applications exposed to moisture, chemicals, or frequent cleaning. Different stainless grades are available to balance corrosion protection and mechanical performance.

Chrome Steel (GCr15 / AISI 52100)

Chrome steel miniature ball bearings offer high hardness, excellent fatigue resistance, and stable running performance. They are suitable for high-speed and low-noise applications operating in clean or controlled environments.

AISI 440C/ 420 / 304 / 316

Stainless steel miniature ball bearings provide corrosion resistance for applications exposed to moisture, chemicals, or frequent cleaning. Different stainless grades are available to balance corrosion protection and mechanical performance.

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Deep Groove Ball Bearings: Application

Deep groove ball bearings are widely used across industrial and commercial applications due to their versatility, reliability, and cost efficiency. Lumi provides application-specific bearing solutions designed to meet different speed, load, and environmental requirements.

Automotive

Drone/UVA

Fitness Equipment

Robotics

Gearboxes

Food Machinery

Agricultural Machinery

Home Appliances

Deep Groove Ball Bearings: Customization & OEM/ODM

• Material Options: A variety of materials are available, including chrome steel (GCr15 / 52100), stainless steel (420 / 440C / 304 / 316), and flanged options.
• Bearing Clearance and Precision: Internal clearance options: C0 / C2 / C3 / C4
• Precision grades: ABEC-1 / ABEC-3 / ABEC-5 / ABEC-7
(ISO P0 / P6 / P5 / P4 equivalents)
• Seals and Shields: Open type, ZZ metal shields, 2RS rubber seals, and customized low-friction sealing solutions
• Lubrication Solutions: Standard grease, low-noise grease, high-speed grease, oil lubrication, and high-temperature lubricants for specific operating conditions

• Special Performance Optimization: Low noise, long life, corrosion resistance, and high-speed performance optimization
• OEM and ODM Support: Lumi provides OEM branding, customized packaging, and technical drawing confirmation services for deep groove ball bearings. From sample validation to stable mass production, our engineering team ensures consistent product quality, reliable performance, and stable long-term supply.

• Material Options: A variety of materials are available, including chrome steel (GCr15 / 52100), stainless steel (420 / 440C / 304 / 316), and flanged options.
• Bearing Clearance and Precision: Internal clearance options: C0 / C2 / C3 / C4
• Precision grades: ABEC-1 / ABEC-3 / ABEC-5 / ABEC-7
(ISO P0 / P6 / P5 / P4 equivalents)
• Seals and Shields: Open type, ZZ metal shields, 2RS rubber seals, and customized low-friction sealing solutions
• Lubrication Solutions: Standard grease, low-noise grease, high-speed grease, oil lubrication, and high-temperature lubricants for specific operating conditions

• Special Performance Optimization: Low noise, long life, corrosion resistance, and high-speed performance optimization
• OEM and ODM Support: Lumi provides OEM branding, customized packaging, and technical drawing confirmation services for deep groove ball bearings. From sample validation to stable mass production, our engineering team ensures consistent product quality, reliable performance, and stable long-term supply.

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