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Spherical Plain Bearings.jpg
Spherical Plain Bearings.jpg

Durable Spherical Plain Bearings from China Suppliers - High-Quality Factory-Direct Solutions for Multi-Directional Support

Spherical plain bearings are engineered to provide exceptional multi-directional self-alignment, making them ideal for applications that demand the support of high radial, axial, or combined loads. Manufactured in China, our spherical plain bearings feature an inner ring with a convex spherical outer surface and an outer ring with a perfectly matching concave spherical inner surface. This design allows for angular misalignment compensation of up to ±10–15°. As a trusted factory and supplier, we ensure that our products meet rigorous quality standards to enhance performance and reliability in diverse industrial applications
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    Product Details

    Key Features

    Self-Aligning Capability

    Compensates for static and dynamic misalignment between shaft and housing.

    Eliminates edge stress caused by installation errors or shaft deflection.

    Load Capacity

    Radial Type: Primarily handles radial loads (e.g., GE…E series).

    Angular Contact Type: Supports combined radial and axial loads (e.g., GAC…F series).

    Thrust Type: Designed for pure axial loads (e.g., GX…F series).

    Sliding Contact Design

    Utilizes sliding motion (not rolling elements), ideal for low-speed, high-load applications.

    Low rotational speed requirement (typically < 100 rpm).

    Maintenance Options

    Maintenance-Free: Lined with self-lubricating materials (PTFE/fiber composite).

    Lubricatable: Equipped with grease fittings for periodic relubrication (suffix -2RS or -C).

    Structure & Materials

    Inner Ring

    Hardened bearing steel (e.g., GCr15) with spherical outer surface.

    Outer Ring

    Carbon steel with spherical inner surface.

    Lining Material

    PTFE Composite: For dry or low-lubrication environments.

    Phosphor Bronze: For high-temperature applications.

    Nylon/PA66: Lightweight and corrosion-resistant.

    Types & Variants

    Radial Spherical Plain Bearings

    Standard type (e.g., GE series).

    With extended inner ring (e.g., GEEW series).

    Angular Contact Bearings

    For combined loads (e.g., GAC series).

    Thrust Spherical Plain Bearings

    For axial loads only (e.g., GX series).

    Special Types

    Rod Ends: Integrated with threaded shafts (e.g., SI…E series).

    Maintenance-Free: Pre-lubricated and sealed (e.g., GE…ES series).

    Applications

    🏭 Industrial Machinery 🚗 Automotive 🌾 Agriculture 🏗️ Construction ✈️ Aerospace
    🏭 Industrial Machinery

    Hydraulic cylinders, piston pumps, injection molding machines.

    🚗 Automotive

    Steering systems, suspension linkages.

    🌾 Agriculture

    Harvesters, tractor implements.

    🏗️ Construction

    Excavator booms, crane joints.

    ✈️ Aerospace

    Landing gear, control surface linkages.

    Technical Specifications

    Parameter Details
    Misalignment Tolerance ±5° to ±15° (varies by series)
    Operating Temperature (Standard) -30°C to +80°C
    Operating Temperature (High-Temp) Up to +300°C (with special materials)
    Load Direction Radial, axial, or combined
    Standards ISO 12240-1, DIN 64807

    Selection Guidelines

    1. Load Type: Confirm radial/axial/combined load requirements.
    2. Misalignment: Determine angular compensation needs.
    3. Speed: Suitable for low-speed applications (< 100 rpm).
    4. Environment: Choose seals (e.g., -2RS for rubber seals) or corrosion-resistant coatings.
    5. Lubrication: Opt for maintenance-free designs in inaccessible or harsh environments.

    Advantages

    🔧
    Reduced Maintenance Self-lubricating options eliminate relubrication needs.
    💪
    High Durability Resists shock loads and vibrations.
    📐
    Compact Design Saves space compared to rolling-element bearings.
    💰
    Cost-Effective Long service life under extreme conditions.

    Frequently Asked Questions

    What is a spherical plain bearing and how does it differ from a rolling-element bearing?
    A spherical plain bearing uses sliding contact between a spherical inner ring and a matching outer ring, rather than rolling elements like balls or rollers. This makes it better suited for low-speed, high-load, and misalignment-prone applications where rolling bearings would experience edge stress or premature failure.
    What is the maximum operating speed for spherical plain bearings?
    Spherical plain bearings are designed for low-speed applications, typically below 100 rpm. They are not suitable for high-speed rotation due to their sliding contact design, which generates more heat at elevated speeds compared to rolling-element bearings.
    How do I choose between a maintenance-free and a lubricatable spherical plain bearing?
    Choose maintenance-free bearings (PTFE/fiber composite lined) for applications in hard-to-reach locations, harsh environments, or where downtime for relubrication is not acceptable. Lubricatable bearings (with grease fittings, suffix -2RS or -C) are preferred when periodic maintenance is feasible and extended service life under heavy loads is required.
    What misalignment angles can spherical plain bearings accommodate?
    Depending on the series, spherical plain bearings can compensate for angular misalignment ranging from ±5° to ±15°. This self-aligning capability makes them ideal for applications where shaft deflection or installation inaccuracies are unavoidable.
    Which spherical plain bearing type should I use for combined radial and axial loads?
    Angular contact spherical plain bearings (e.g., GAC series) are specifically designed to handle combined radial and axial loads simultaneously. For pure radial loads, use the standard GE series; for pure axial (thrust) loads, use the GX series.
    What international standards apply to spherical plain bearings?
    Spherical plain bearings are manufactured in accordance with ISO 12240-1 and DIN 64807. These standards define dimensional tolerances, load ratings, and material requirements, ensuring interchangeability and consistent performance across different manufacturers.