Leave Your Message
Products Categories
Featured Products
Open Type Deep Groove Ball Bearings

Open Type Deep Groove Ball Bearings
Smooth SelfAligning Ball Bearings

Smooth SelfAligning Ball Bearings
Cylindrical Roller Bearings

Cylindrical Roller Bearings
Powerful Spherical Roller Bearings

Powerful Spherical Roller Bearings
Full-Complement Needle Roller Bearings

Full-Complement Needle Roller Bearings
Hard Angular Contact Ball Bearings

Hard Angular Contact Ball Bearings
Tapered Roller Bearings

Tapered Roller Bearings
High Efficient Thrust Ball Bearings

High Efficient Thrust Ball Bearings
Thrust Cylindrical Roller Bearin

Thrust Cylindrical Roller Bearin
Thrust Angular Contact Ball Bearings

Thrust Angular Contact Ball Bearings
Deep Groove Ball Bearings.jpg
Deep Groove Ball Bearings.jpg

China Deep Groove Ball Bearings Suppliers - Precision Factory for Radial and Axial Load Solutions

,

Deep groove ball bearings are widely used and non-separable bearings featuring deep raceway grooves on both the inner and outer rings. These bearings are primarily engineered to handle radial loads efficiently. With increased radial internal clearance, they can also demonstrate characteristics of angular contact ball bearings, enabling them to support combined radial and axial loads. Additionally, in high-speed applications where thrust ball bearings are not suitable, deep groove ball bearings can effectively manage pure axial loads. As a leading factory and supplier in China, we ensure our products meet high-quality standards to support various industrial applications.

,
    Contact us
    Product Details

    Bearings with Shields or Seals

    In addition to open-type base bearings, sealed bearings are available for applications where relubrication is difficult. Types include:

    • Bearings with one or two shields (designated Z, 2Z).
    • Bearings with one or two non-contact seals (designated RZ, 2RZ).
    • Bearings with one or two contact seals (designated RS1, 2RS1).

    These bearings are suitable for low-speed applications. They are pre-lubricated with an appropriate amount of grease during manufacturing and do not require cleaning or relubrication during installation. The grease provides rust prevention and sealing. These bearings are widely used in various machinery, especially in harsh environments where built-in sealing is required.

    ⓘ  The grease fill quantity depends on the bearing size and operating conditions, typically occupying 25% to 35% of the internal free space.

    Bearings with Snap Rings or Grooves

    Deep groove ball bearings with snap ring grooves or snap rings on the outer ring are available. These bearings simplify housing design by allowing the bearing to be axially secured in the housing using a snap ring. They are preferred when installation space is limited. The corresponding snap ring dimensions are listed in the bearing dimension tables.

    Low-Noise Bearings

    Low-noise bearings are available, such as:

    • Acceleration-level low-noise bearings with suffix codes Z1, Z2, Z3.
    • Ultra-low-noise bearings with suffix code Z4, suitable for quiet operation in applications like air conditioner motors.
    • Velocity-level low-noise bearings with suffix codes V1, V2, V3.

    Various combinations of deep groove ball bearings can be customized based on user requirements. Bearings are available in different tolerance classes and vibration groups.

    Z1 Z2 Z3 Z4 — Ultra Low Noise V1 V2 V3

    Dimensions

    The dimensions of the basic bearing types listed in the dimension tables conform to ISO 15:1981. The dimensions of snap ring grooves and snap rings comply with ISO 464:1976.

    Angular Misalignment

    Single-row deep groove ball bearings have limited ability to accommodate angular misalignment. The maximum permissible angular misalignment between the inner and outer rings depends on the operating radial clearance, bearing size, internal design, and the forces and moments acting on the bearing.

    ⓘ  Under normal operating conditions, the maximum allowable angular misalignment is approximately 2 to 10 arcminutes for single-row bearings.

    It should be noted that angular misalignment between the inner and outer rings during operation will significantly increase noise levels. Double-row deep groove ball bearings can only accommodate angular misalignment of up to 2 arcminutes. Greater misalignment will increase the load on the balls and raceways, potentially reducing bearing service life.

    Tolerances

    Standard deep groove ball bearings are manufactured to P0 tolerance class. Higher-precision bearings are also available:

    P0 — Standard P6 P5 P4 P2 — Highest Precision

    Radial Internal Clearance

    Standard deep groove ball bearings are supplied with C0 group clearance. Bearings with greater or smaller clearances than the standard group are also available. Double-row deep groove ball bearings have standard radial internal clearance.

    Back-to-back or face-to-face paired bearings are typically supplied in the following two configurations:

    • Small axial clearance (suffix code CA).
    • Light preload (suffix code GA).

    These are available in series 60, 62, and 63.

    The clearance and preload values for paired bearings are provided in the table below:

    Configuration Suffix Code Available Series Description
    Small Axial Clearance CA 60, 62, 63 Minimal play between paired bearings
    Light Preload GA 60, 62, 63 Slight compressive force applied to paired bearings

    Frequently Asked Questions

    Q What is the difference between shielded and sealed deep groove ball bearings?
    Shielded bearings (Z, 2Z) use metal shields that do not contact the inner ring, providing protection with minimal friction. Sealed bearings use either non-contact seals (RZ, 2RZ) or contact seals (RS1, 2RS1). Contact seals offer better sealing against contaminants but generate slightly more friction, making them ideal for harsh or dirty environments.
    Q Do sealed bearings require relubrication during operation?
    No. Sealed and shielded bearings are pre-lubricated with grease during manufacturing. They are designed as maintenance-free units and do not require cleaning or relubrication during installation or normal service life. The grease also provides rust prevention.
    Q What does the suffix code Z4 mean for low-noise bearings?
    The Z4 suffix designates ultra-low-noise bearings measured by acceleration level. These bearings meet the most stringent vibration and noise requirements and are commonly used in applications demanding very quiet operation, such as air conditioner motors and precision instruments.
    Q How much angular misalignment can a single-row deep groove ball bearing tolerate?
    Under normal operating conditions, single-row deep groove ball bearings can typically accommodate angular misalignment of approximately 2 to 10 arcminutes. Exceeding this range generates excessive additional stresses and significantly increases noise. Double-row variants are more restrictive, with a maximum of 2 arcminutes.
    Q What tolerance classes are available for deep groove ball bearings?
    Standard bearings are manufactured to P0 tolerance class. For applications requiring higher precision, bearings are available in P6, P5, P4, and P2 classes, with P2 being the highest precision. Higher tolerance classes are used in precision machinery, machine tool spindles, and instrumentation.
    Q What are the suffix codes CA and GA used for in paired bearings?
    CA and GA are suffix codes for back-to-back or face-to-face paired bearing configurations. CA indicates a small axial clearance arrangement, while GA indicates a light preload arrangement. Both configurations are available in bearing series 60, 62, and 63, and are used to improve axial rigidity and load distribution in paired mounting applications.