KET Bearing Quality: Automated Demagnetization & Washing Line

In the production of precision miniature bearings, the grinding process achieves perfect dimensions, but it leaves behind a hidden threat: microscopic iron chips (swarf) and residual magnetic fields. At Ningbo Kexiang Bearing Technology Co., Ltd. (KET), we know that assembling a bearing with even a single micron-sized particle can lead to friction, abnormal noise, and premature failure.

To eliminate this risk, KET integrates a fully Automated Demagnetization & Washing Line into our ISO9001-certified manufacturing workflow. This critical transition phase happens right after the fine grinding process and immediately before the final assembly (ball fitting and greasing).

The Pre-Assembly Purification Process

Our automated purification line is designed to treat the ferrules (the inner and outer rings of the bearing) through a rigorous three-step process without requiring manual handling. This ensures 100% consistency across our annual production of over 100 million bearing sets.

1. Automatic Demagnetization

During grinding, the rings are held in place by powerful magnetic chucks, which leaves the bearing steel magnetized. If left untreated, this residual magnetism will act like a magnet for stray iron dust in the environment.

As the ferrules enter the line, they pass through a high-efficiency demagnetizer. This system applies an alternating magnetic field that gradually decreases to zero, completely neutralizing the magnetic properties of the rings. This ensures that metallic debris can be easily washed away rather than clinging stubbornly to the raceways.

2. Ultrasonic Washing

Once demagnetized, the rings are submerged in specialized industrial cleaning solutions and subjected to high-frequency ultrasonic waves. The ultrasonic transducer creates millions of microscopic cavitation bubbles in the liquid.

When these bubbles implode against the surface of the ferrules, they generate intense, localized scrubbing energy. This safely and effectively blasts away:

• Residual iron chips and swarf from the grinding process.
• Coolants, cutting fluids, and anti-rust oils.
• Microscopic dust particles hidden deep within the bearing grooves.

3. Precision Drying

Moisture is the enemy of bearing steel. Immediately following the ultrasonic wash, the ferrules pass through a high-temperature, forced-air drying tunnel. This automated drying process rapidly evaporates all water and cleaning agents, leaving the rings immaculately clean, dry, and ready for immediate assembly and rust-preventative greasing.

Why This Matters to Our B2B Partners

For buyers sourcing bearings for UAVs, medical devices, or high-speed electric motors, the cleanliness of the bearing internals is a non-negotiable factor. KET’s Demagnetization & Washing Line directly translates to superior product performance:

• Zero "Gritty" Rotation: Complete removal of iron chips ensures silk-smooth rotation without jamming.
• Z1-Z4 Grade Noise Reduction: A pristine raceway is the foundation of a silent bearing, meeting strict acoustic requirements.
• Optimized Lubrication: Clean surfaces allow our premium greases (such as Kyodo Yushi or Shell) to adhere perfectly to the steel, maximizing the bearing's lifespan.

By investing in automated purification technology, KET ensures that every miniature bearing delivered to your factory floor represents the pinnacle of reliability and precision.