Durable Spherical Plain Bearings from China Factory - Leading Suppliers for Multi-Directional Self-Alignment
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.
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Outer Ring
Carbon steel with spherical inner surface.
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Lining Material
PTFE Composite: Dry or low-lubrication environments.
Phosphor Bronze: High-temperature applications.
Nylon/PA66: Lightweight and corrosion-resistant.
Phosphor Bronze: High-temperature applications.
Nylon/PA66: Lightweight and corrosion-resistant.
Types & Variants
1. Radial Spherical Plain Bearings
· Standard type (e.g., GE series).
· With extended inner ring (e.g., GEEW series).
2. Angular Contact Spherical Plain Bearings
· For combined loads (e.g., GAC series).
3. Thrust Spherical Plain Bearings
· For axial loads only (e.g., GX series).
4. 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
Hydraulic cylinders, piston pumps, injection molding machines.
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Automotive
Steering systems, suspension linkages.
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Agriculture
Harvesters, tractor implements.
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Construction
Excavator booms, crane joints.
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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
- Load Type: Confirm radial / axial / combined load requirements.
- Misalignment: Determine angular compensation needs.
- Speed: Suitable for low-speed applications (< 100 rpm).
- Environment: Choose seals (e.g., -2RS for rubber seals) or corrosion-resistant coatings.
- Lubrication: Opt for maintenance-free designs in inaccessible or harsh environments.
Advantages
🔋
Reduced Maintenance
Self-lubricating options eliminate relubrication needs.
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High Durability
Resists shock loads and vibrations.
📐
Compact Design
Saves space compared to rolling-element bearings.
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Cost-Effective
Long service life under extreme conditions.
Frequently Asked Questions
What is a spherical plain bearing and how does it work?
A spherical plain bearing is a sliding-contact bearing that uses a spherical inner ring surface mating with a concave outer ring surface. This design allows the bearing to self-align and compensate for angular misalignment between a shaft and housing, making it ideal for applications where shaft deflection or installation errors are common.
What is the maximum operating speed for spherical plain bearings?
Spherical plain bearings are designed for low-speed applications, typically operating at less than 100 rpm. They are not suitable for high-speed continuous rotation but excel under oscillating, tilting, and slow rotational movements with heavy loads.
What is the difference between maintenance-free and lubricatable spherical plain bearings?
Maintenance-free bearings are lined with self-lubricating materials such as PTFE or fiber composites, requiring no relubrication throughout their service life. Lubricatable bearings feature grease fittings (suffix -2RS or -C) that allow periodic relubrication, which can extend service life in demanding environments.
What temperature range can spherical plain bearings handle?
Standard spherical plain bearings operate within -30°C to +80°C. For high-temperature applications, special material variants — such as phosphor bronze lining — can withstand temperatures up to +300°C.
Which type of spherical plain bearing should I choose 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, the GE series is recommended, while the GX series is suited for pure axial (thrust) loads.
What international standards apply to spherical plain bearings?
Spherical plain bearings are manufactured in accordance with ISO 12240-1 and DIN 64807 standards, ensuring dimensional consistency, load rating accuracy, and interchangeability across different manufacturers and applications.