Ball Bearing With Rhombic Outer Spherical Surface

1. Product Definition and Core Composition​

Spherical roller bearings with diamond-shaped housings are integrated bearing units composed of spherical outer roller bearings and diamond-shaped bearing housings. They are designed and manufactured in accordance with the national standard GB/T 7810-1995, where the bearing part complies with GB/T 3882-1995 and the bearing housing follows GB/T 7809-1995, forming a standardized matching relationship between the two components. Their core function is to provide stable support for the rotors or shafts of mechanical equipment, achieving self-aligning compensation through spherical fitting to adapt to various complex working conditions.​

2. Structural and Performance Characteristics​

Structural Design Advantages​

Bearing Body: Adopts a spherical outer structure design, with the outer diameter surface of the outer ring being spherical, which can be precisely matched with the concave spherical surface of the bearing housing. It features automatic self-aligning function, capable of compensating for installation errors or shaft deflection deformation.​

Diamond-Shaped Bearing Housing: The unique diamond-shaped base structure enhances overall stability. Compared with square or circular bases, it is more suitable for narrow installation spaces. It is fixed through bolt holes (dimensions such as the center distance of bolt holes are standardized by model), ensuring strong installation compatibility. Some products use stamping process to manufacture diamond-shaped housings, further optimizing the weight and cost ratio.​

 Key Performance Indicators​

Load-Bearing Capacity: Mainly bears radial loads and can also withstand certain combined axial loads. Products with double-row structure have better load-bearing capacity and rigidity, suitable for medium and heavy-load working conditions.​

Environmental Adaptability: Adopts a double-layer sealing type, which can effectively isolate dust, cement, corrosive media, and is suitable for harsh industrial environments.​

Maintenance Convenience: The bearing and bearing housing are interchangeable, with a simple and easy-to-disassemble structure, significantly reducing maintenance costs and downtime.​

3. Materials and Manufacturing Processes

4. Model Specification System​

Core Series Classification​

Mainstream Series: Represented by the UCFL series, with specifications distinguished by bearing inner diameter. Common models include UCFL203 (inner diameter 17mm), UCFL204 (inner diameter 20mm), UCFL205 (inner diameter 25mm), etc., covering conventional industrial needs.​

Special Series: Including micro BDU series (such as BDU01, BDU02) and stamped diamond-shaped housing bearings, suitable for micro-mechanisms and lightweight scenarios.​

Model Interpretation Logic​

Models usually include structural type and dimension information. For example, in "UCFL204": U represents spherical outer bearing, C denotes structural feature, FL indicates diamond-shaped housing, and 204 corresponds to the dimension series with an inner diameter of 20mm.​

5. Selection and Installation Guide​

Three Key Factors for Selection​

Dimension Matching: Determine the bearing inner diameter based on the shaft diameter (e.g., a shaft diameter of 20mm corresponds to the 204 series), and check the installation dimensions of the bearing housing (such as bolt hole center distance J, total length L, etc.) at the same time.​

Working Condition Adaptation: Prioritize stainless steel materials for dusty/corrosive environments, select double-row structures for heavy-load scenarios, and specify diamond-shaped bases for narrow spaces.​

Load Verification: According to the actual radial/axial loads of the equipment, confirm that the rated dynamic load and static load of the bearing meet the requirements.​

Standard Installation Process​

Preprocessing: Clean the oil stains on the bearing surface and apply suitable grease (synthetic grease for high-temperature working conditions, lithium-based grease for dusty environments).​

Assembly: Embed the bearing into the concave spherical surface of the diamond-shaped housing to ensure tight fitting. Fasten the bearing housing to the installation surface with bolts, and control the torque according to the material characteristics (avoid over-tightening to prevent breakage of gray cast iron housings).​

Verification: After installation, check the rotational flexibility of the shaft, ensure there is no jamming or abnormal noise, and adjust the position of the bearing housing if necessary to compensate for coaxiality errors.

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