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High Efficient Thrust Ball Bearings by China Suppliers | Reliable Products from Trusted Factory

Thrust ball bearings are essential components in various mechanical applications, and they are primarily categorized into single-direction thrust ball bearings and double-direction thrust ball bearings. As a leading factory in China, we specialize in manufacturing high-quality thrust ball bearings that meet international standards. Our products are crafted with precision and are trusted by numerous suppliers worldwide for their durability and performance. Choose our thrust ball bearings for reliable solutions in your machinery needs
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    Product Details

    Single-Direction Thrust Ball Bearings

    Tapered roller bearings are classified into three types:

    • Single-row
    • Double-row
    • Four-row

    The main parameters of tapered roller bearings have been optimized, increasing the number of rollers and their effective length. The meticulous design of the rollers and raceways significantly improves geometric contact, stress distribution, and lubricant film formation, enhancing roller motion conditions. Consequently, compared to earlier models of the same size, these bearings offer higher load capacity and extended rated service life.

    Double-row tapered roller bearings can withstand combined radial and axial loads (primarily radial) as well as bidirectional axial loads. A spacer is placed between the two inner rings, allowing clearance adjustment and uniform load distribution by varying the spacer thickness. These bearings are suitable for medium to low-speed applications.

    Double-Direction Thrust Ball Bearings

    Double-direction thrust ball bearings are separable bearings. They consist of:

    Shaft Washer One shaft washer with grooves on both sides
    Housing Washers Two housing washers for structural support
    Ball & Cage Assemblies Two ball and cage assemblies

    These bearings can accommodate bidirectional axial loads but cannot carry any radial load. They provide bidirectional axial positioning for the shaft.

    The housing washers and ball-and-cage assemblies are identical to those used in corresponding single-direction bearings.

    Dimensions

    The basic dimensions of thrust ball bearings listed in the tables comply with ISO 104.

    Tolerances

    Standard thrust ball bearings are manufactured to P0 tolerance grade. Upon request, bearings with higher precision grades such as P6, P5, or even P4 can be provided. Tolerance values for each grade can be referenced in the standards.

    Standard GradeP0
    Higher PrecisionP6 / P5 / P4

    Cages

    Thrust ball bearings use either stamped steel cages or machined brass cages. The cage material for specific specifications is provided in the table below.

    Minimum Load

    During operation, inertial forces may cause sliding between the balls and raceways, leading to increased temperature and damage to working surfaces. To prevent this, a minimum axial load Fa min must be applied:

    Fa min ≥ A × ( nmax / 1000 )²
    Parameters
    • Fa min — Minimum axial load (kN)
    • A — Minimum load coefficient (provided in bearing dimension tables)
    • nmax — Maximum operating speed (rpm)

    The weight of supported components combined with external forces often exceeds the minimum load. If not, preload must be applied (e.g., using springs).

    Static Equivalent Load

    For single- and double-direction thrust ball bearings:

    Static Equivalent Load P₀ = Fa

    Dynamic Equivalent Load

    For single- and double-direction thrust ball bearings:

    Dynamic Equivalent Load P = Fa

    Frequently Asked Questions

    Q What is the difference between single-direction and double-direction thrust ball bearings?
    Single-direction thrust ball bearings can only accommodate axial loads in one direction, while double-direction thrust ball bearings feature a shaft washer with grooves on both sides, allowing them to handle bidirectional axial loads. Double-direction variants consist of two ball-and-cage assemblies and two housing washers, providing axial positioning in both directions.
    Q Can thrust ball bearings carry radial loads?
    No. Thrust ball bearings — both single-direction and double-direction — are designed exclusively for axial loads and cannot carry any radial load. If combined radial and axial loads are required, tapered roller bearings or angular contact bearings should be considered instead.
    Q What tolerance grades are available for thrust ball bearings?
    Standard thrust ball bearings are manufactured to the P0 tolerance grade. Higher precision grades — P6, P5, and P4 — are also available upon request for applications that require tighter dimensional accuracy and reduced runout. Tolerance values for each grade are defined in the relevant standards.
    Q Why is a minimum axial load required for thrust ball bearings?
    During operation, inertial forces can cause sliding between the balls and raceways rather than pure rolling. This sliding generates excessive heat and can damage the contact surfaces. Applying a minimum axial load Fa min ensures adequate contact force, maintaining proper rolling motion. If the weight of supported components does not provide sufficient load, a preload mechanism such as a spring should be used.
    Q What cage materials are used in thrust ball bearings?
    Thrust ball bearings are available with two types of cages: stamped steel cages and machined brass cages. The specific cage material used for a given bearing specification can be found in the bearing dimension and specification tables, as it varies depending on the bearing size and application requirements.
    Q Which dimensional standard do thrust ball bearings comply with?
    The basic dimensions of thrust ball bearings listed in the product tables comply with ISO 104, the international standard governing the boundary dimensions of thrust ball bearings. This ensures interchangeability and compatibility across different manufacturers and applications.