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Reinventing Angular Contact Technology: QIBR's Four-Point Contact Bearings Lead the Future of Precision Motion
In the rapidly advancing field of precision engineering, Four-Point Contact Ball Bearings have emerged as a key solution for achieving smooth motion, compact design, and exceptional load-handling capability. Unlike conventional angular contact bearings, they are capable of carrying radial and axial loads in both directions within a single bearing unit. As a trusted name in the global bearing industry, QIBR has continuously optimized its QJ series to meet the needs of modern machinery, with the QJ224N2MAC3 model representing the perfect blend of precision, durability, and innovation.
Understanding the Four-Point Contact Concept
Unlike conventional angular contact ball bearings, which require pairing to support axial loads in both directions, a four-point contact bearing can achieve this function within a single bearing unit.
Its inner ring is split into two halves, allowing the raceway grooves to form four contact points with the balls — hence the name “four-point contact.”
This structure enables the bearing to support:
- Radial loads
- Axial loads in both directions
- Combined loads, even under high-speed operation
Such versatility makes it a preferred choice for applications that demand space-saving design, high rigidity, and smooth rotation under dynamic conditions.
Model Spotlight: QJ224N2MAC3
The QJ224N2MAC3 is a standout model in QIBR’s QJ series. With its optimized raceway geometry and machined brass cage, it provides exceptional durability and load distribution accuracy.
Key Features:
- Model: QJ224N2MAC3
- Type: Four-point contact ball bearing
- Structure: Split inner ring with brass cage
- Applications: Machine tool spindles, gearboxes, compressors, and precision rotating systems
- Benefits:
- Handles axial loads from both directions
- Reduces assembly complexity by replacing two single-row bearings
- Ensures long service life under high-speed or oscillating conditions
In demanding industries where space and accuracy matter most, such as robotics, aerospace, and energy equipment, the QJ224N2MAC3 delivers a reliable balance between strength and smooth motion.
Advantages of QIBR Four-Point Contact Bearings
QIBR's four-point contact bearings are designed with cutting-edge precision and strict quality control, offering:
- High stiffness and running accuracy
- Reduced internal friction
- Stable temperature control during operation
- Extended service life under high-load cycles
By integrating advanced materials and optimized cage designs, QIBR ensures that every bearing provides consistent performance, even under fluctuating speed and load conditions.
Applications Across Industries
Four-point contact bearings are widely used in:
- Rotary tables
- Ball screw supports
- Industrial gearboxes
- Wind turbines
- Aerospace actuators
- Packaging machinery
Their ability to manage complex loading conditions in a compact space makes them indispensable in modern high-precision mechanical systems.
QIBR's Commitment to Precision Engineering
QIBR's mission has always been to deliver innovative bearing solutions that meet the growing demands of precision-driven industries. Through ongoing R&D investment, the company continues to improve its QJ series bearings — enhancing their load capacity, sealing options, and lubrication control.
The QJ224N2MAC3 model exemplifies QIBR’s engineering expertise, combining reliability, flexibility, and accuracy in one compact solution — ensuring every rotation counts.
