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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 Bearings from Trusted Factory

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Deep groove ball bearings, produced by leading manufacturers in China, are essential components in various machinery. These non-separable bearings feature deep raceway grooves on both inner and outer rings, specifically designed to handle radial loads efficiently. As trusted suppliers in the industry, we offer deep groove ball bearings that, with increased radial internal clearance, can emulate the performance of angular contact ball bearings, allowing them to accommodate both radial and axial loads. Additionally, when faced with high rotational speeds where thrust ball bearings are inadequate, our deep groove ball bearings remain reliable for carrying pure axial loads. Partner with our factory for high-quality bearings tailored to your 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:

    • 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.

    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 axial play between paired bearings
    Light Preload GA 60, 62, 63 Light preload applied to paired bearings

    Frequently Asked Questions

    QWhat 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 against contaminants. Sealed bearings (RS1, 2RS1) use contact seals that provide superior sealing against dust and moisture, making them better suited for harsh or contaminated environments. Non-contact seal variants (RZ, 2RZ) offer a compromise between friction and sealing performance.
    QDo 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 bearing's internal free space.
    QWhat is the maximum angular misalignment allowed 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 significantly reduce bearing service life.
    QWhat tolerance classes are available for deep groove ball bearings?
    Standard deep groove ball 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 grade.
    QWhat are the benefits of using bearings with snap ring grooves?
    Bearings with snap ring grooves on the outer ring allow axial positioning within the housing without additional retaining components. This simplifies housing design, reduces part count, and is especially advantageous in applications where installation space is limited. Snap ring dimensions are standardized per ISO 464:1976.
    QWhat do the suffix codes CA and GA mean for paired bearings?
    CA denotes a small axial clearance configuration for back-to-back or face-to-face paired bearings, providing minimal play between the pair. GA denotes a light preload configuration, where a small compressive load is applied to eliminate internal clearance and improve rigidity. Both configurations are available in bearing series 60, 62, and 63.