Precision Meets Power: Inside QIBR’s ZARN Series Combined Bearings

In the ever-evolving world of industrial automation and precision machinery, Combined Precision Bearings play a vital role in ensuring stability, accuracy, and reliability. Among the most trusted names in this field, QIBR continues to innovate with its advanced series of combined axial-radial bearings designed for demanding applications such as machine tools, robotics, and precision rotary tables.

What Are Combined Precision Bearings?

Combined precision bearings, also known as axial-radial bearings, are engineered to handle both axial and radial loads simultaneously within a compact structure. Their unique design enables high stiffness and positioning accuracy, making them ideal for applications requiring smooth rotation and minimal deflection under load.

Unlike conventional bearings that can only manage one type of load, combined bearings integrate both load-handling directions into one unit — reducing the need for separate bearing assemblies and ensuring higher precision alignment.

Structure and Performance

The QIBR combined bearing series adopts a double-row cylindrical roller and axial needle roller structure, offering excellent rigidity and load-carrying capacity. Each bearing is produced with micron-level tolerance and undergoes strict quality control to ensure flawless performance in high-speed and high-precision environments.

Two representative models stand out in the lineup:

• ZARN 4075 TV – Designed for heavy-duty applications, this bearing provides superior axial load capacity while maintaining high rotational precision. It is widely used in vertical spindles and feed screw support systems where both rigidity and accuracy are crucial.
• ZARN 2557 TV – A compact version suitable for smaller precision mechanisms such as measuring equipment and automation systems. Despite its smaller size, it delivers outstanding performance under combined axial and radial stresses.

Applications Across Industries

Combined precision bearings are essential in:

• CNC machining centers
• Indexing tables and rotary axes
• Ball screw supports
• Measurement and testing systems
• Robotics and automation mechanisms

Their ability to maintain smooth rotation, even under complex load conditions, makes them indispensable in precision-driven industries.

QIBR's Commitment to Precision

QIBR has consistently invested in advanced production technologies and testing systems to ensure that every bearing meets global standards for accuracy and reliability. The company's ZARN series bearings are known for their long service life, reduced friction, and consistent performance, even in challenging industrial environments.

By combining innovation, precision engineering, and strict quality assurance, QIBR continues to support the global shift toward high-performance and intelligent manufacturing.