Durable Spherical Plain Bearings from China - Reliable Suppliers & Factory for High-Quality Bearings
Key Features
1. Self-Aligning Capability
- Compensates for static and dynamic misalignment between shaft and housing.
- Eliminates edge stress caused by installation errors or shaft deflection.
2. 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).
3. Sliding Contact Design
- Utilizes sliding motion (not rolling elements), making them ideal for low-speed, high-load applications.
- Low rotational speed requirement (typically < 100 rpm).
4. 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
Components
- 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
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)
Automotive (Steering systems, suspension linkages)
Agriculture (Harvesters, tractor implements)
Construction (Excavator booms, crane joints)
Aerospace (Landing gear, control surface linkages)
Technical Specifications
| Misalignment Tolerance | ±5° to ±15° (varies by series). |
| Operating Temperature | Standard: -30°C to +80°C. High-Temperature: 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 are the primary load capacities of spherical plain bearings?
Spherical plain bearings are designed to handle different load directions depending on their type. Radial types support radial loads, angular contact types support combined radial and axial loads, and thrust types are designed specifically for pure axial loads.
When should I choose a maintenance-free spherical plain bearing?
Maintenance-free bearings lined with self-lubricating materials (such as PTFE composite) are ideal for applications where relubrication is difficult or impossible, or in environments where dry operation is preferred.
What is the typical operating temperature range for these bearings?
Standard spherical plain bearings operate effectively between -30°C and +80°C. For extreme environments, high-temperature variants using specialized materials can withstand temperatures up to +300°C.
How much misalignment can spherical plain bearings tolerate?
Depending on the specific bearing series and design, the misalignment tolerance typically ranges from ±5° to ±15°, allowing them to compensate for dynamic and static shaft misalignments.
Are spherical plain bearings suitable for high-speed rotation?
No, spherical plain bearings utilize a sliding contact design rather than rolling elements. This makes them highly suitable for low-speed, high-load applications, typically requiring rotational speeds of less than 100 rpm.