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Open Type Deep Groove Ball Bearings

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Deep Groove Ball Bearings.jpg
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China Deep Groove Ball Bearings Suppliers - High-Quality Ball Bearings from Trusted Factory

Deep groove ball bearings are high-performance, non-separable components featuring deep raceway grooves on both the inner and outer rings. These bearings are primarily engineered to handle radial loads efficiently. As the radial internal clearance increases, they can mimic the performance characteristics of angular contact ball bearings, making them suitable for accommodating combined radial and axial loads. In scenarios where high rotational speeds render thrust ball bearings ineffective, deep groove ball bearings can effectively manage pure axial loads. With a reliable China factory as well as prominent suppliers in the market, we provide top-quality deep groove ball bearings to meet diverse industrial needs
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    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:

    • Z / 2Z Bearings with one or two shields
    • RZ / 2RZ Bearings with one or two non-contact seals
    • RS1 / 2RS1 Bearings with one or two contact seals
    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:

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

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

    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.

    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:

    • P6 Enhanced precision
    • P5 High precision
    • P4 Very high precision
    • P2 Ultra-high 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:

    • CA Small axial clearance
    • GA Light preload

    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 axial play between paired bearings
    Light Preload GA 60, 62, 63 Light preload 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, offering low friction and protection from coarse contaminants. Sealed bearings use either non-contact seals (RZ, 2RZ) or contact seals (RS1, 2RS1). Contact seals provide better protection against fine dust and moisture but generate slightly more friction, making them ideal for harsh 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 operation. The grease fill typically occupies 25% to 35% of the internal free space.
    Q What is the maximum angular misalignment for single-row deep groove ball bearings?
    Under normal operating conditions, single-row deep groove ball bearings can accommodate approximately 2 to 10 arcminutes of angular misalignment. Double-row variants are more restrictive, with a maximum of 2 arcminutes. Exceeding these limits increases noise, load on raceways, and can reduce bearing service life.
    Q What tolerance classes are available for deep groove ball bearings?
    Standard bearings are manufactured to P0 tolerance class. For applications requiring higher precision — such as machine tool spindles or precision instruments — bearings are available in P6, P5, P4, and P2 classes, with P2 being the highest precision level.
    Q What are the suffix codes for low-noise bearings and when should they be used?
    Low-noise bearings are classified by acceleration level (Z1, Z2, Z3) and velocity level (V1, V2, V3). The Z4 suffix denotes ultra-low-noise bearings, commonly used in air conditioner motors and other applications where quiet operation is critical. The appropriate suffix depends on the noise measurement method and application requirements.
    Q What is the purpose of snap ring grooves on deep groove ball bearings?
    Snap ring grooves on the outer ring allow the bearing to be axially secured within a housing using a snap ring, eliminating the need for additional retaining features in the housing design. This simplifies housing machining and is especially useful in applications where axial space is limited.