Self Aligning Precision Insert Bearings from China Suppliers - High-Quality Bearings from Factory
Product Introduction
Clamping Methods
- Set screw type
- Eccentric collar type
- Tapered bore with adapter sleeve type
- Locking collar type
Housing Materials
- Cast iron housings
- Stamped steel housings
Sealing Design: Insert bearings are designed with various sealing devices. Different sealing structures can be selected based on working conditions to ensure reliability and extended service life.
Structure of Set Screw Type Insert Bearing with Pillow Block Housing
Rigid monolithic structure for easy installation.
Facilitates secure locking with set screws and enhances rigidity.
Two set screws positioned at 120° angles on the inner ring ensure firm attachment to the shaft.
One on each side to effectively block dust ingress.
Installed inside the retainer rings on both sides to ensure effective lubrication of rolling elements and raceways.
Allows injection of fresh lubricant.
Automatically compensates for inevitable shaft deformation or installation misalignment.
Radial Clearance
The radial clearance of insert bearings is generally larger than that of deep groove ball bearings.
How to Select Insert Bearings?
Bearing size selection is primarily based on load capacity, service life requirements, and reliability. The basic load rating is a key technical indicator for evaluating bearing load capacity, including:
Basic Dynamic Load Rating
For rotational conditions (n > 10 rpm)
Basic Static Load Rating
For stationary, slow-rotation, or oscillating applications (n ≤ 10 rpm)
As radial ball bearings, insert bearings primarily withstand radial forces. Thus, their load ratings are expressed as:
- Radial basic dynamic load rating (Cᵣ)
- Radial basic static load rating (C₀ᵣ)
These values are provided in the product dimension tables.
Service Life Considerations
Life calculation is a critical basis for selecting rolling bearings. "Life" typically refers to fatigue life. Under proper operating conditions (moderate loads, correct installation, adequate lubrication), bearing failure is mainly caused by fatigue spalling of rolling contact surfaces due to alternating stress—a phenomenon that cannot be entirely avoided.
Lifespans Categorized by Failure Mode:
- Noise life
- Wear life
- Lubricant life
Failures unrelated to fatigue life (e.g., seizing, fracture, cracks, brinelling, seal failure) are considered bearing faults. These stem from improper selection, mechanical design flaws, installation errors, misuse, or manufacturing defects, and should be distinguished from natural (service life).
Frequently Asked Questions
Insert bearings are typically classified into four types based on their clamping method: set screw type, eccentric collar type, tapered bore with adapter sleeve type, and locking collar type.
Bearing housings are categorized by material into cast iron housings (which offer a rigid monolithic structure) and stamped steel housings.
The radial clearance of insert bearings is generally larger than that of standard deep groove ball bearings.
Bearing size selection is primarily based on load capacity, service life requirements, and reliability. This includes analyzing the radial basic dynamic load rating (Cr) and the radial basic static load rating (C0r).
Fatigue life refers to natural failure caused by fatigue spalling under proper operating conditions. Bearing faults, such as seizing, fracture, cracks, or seal failure, are unnatural failures stemming from improper selection, installation errors, design flaws, or manufacturing defects.