KET Precision Miniature Bearings: Automated Grinding Line

When it comes to manufacturing precision miniature bearings (ranging from 1mm to 20mm in inner diameter), there is zero room for error. At Ningbo Kexiang Bearing Technology Co., Ltd. (KET), established in 2008, achieving this level of microscopic accuracy is a daily reality.

From aerospace UAVs and precision medical equipment to everyday household appliances, KET’s bearings are trusted globally. The secret behind this reliable performance lies in our core manufacturing pillars: an optimized inner and outer ring fine grinding process and cutting-edge automation.

The Art of Precision: KET’s Fine Grinding Process

The soul of a bearing's lifespan and noise reduction capabilities lies in its raceways—the channels where the balls roll. KET has perfected a multi-step grinding process to ensure perfect roundness, smoothness, and durability. According to KET's strict production flow, the transformation of raw materials into high-precision components involves a rigorous sequence:

1. Pre-Grinding & Heat Treatment: After the initial ferrule turning, the components undergo plane soft grinding and external soft grinding. This prepares the metal for heat treatment, ensuring the bearing steel achieves the necessary hardness without warping.
2. Internal & External Fine Grinding: Post-heat treatment, the rings enter the fine grinding phase. This step meticulously shapes the inner and outer dimensions to exact specifications.
3. Inner Ring & Outer Ring Groove Grinding: Precision grinding is applied to the inner ring hole and the outer ring's inner groove. This step is critical for ensuring the balls fit perfectly and distribute loads evenly.
4. Channel Super Precision (Full Inspection): The final polishing of the raceway channels is known as "super precision" grinding. This eliminates microscopic surface imperfections, dramatically reducing friction coefficients and allowing the bearings to achieve extreme limiting speeds with minimal noise.

State-of-the-Art Automated Bearing Grinding Line

To maintain consistency across an annual production volume of over 100 million sets (spanning more than 300 varieties), KET heavily invests in advanced automated production and testing equipment. Relying on manual labor for micro-level precision is a thing of the past.

At the heart of our Zhenhai District facility is the Automated Bearing Grinding Line. In the bearing manufacturing industry, this refers to a fully unmanned assembly line created by integrating multiple specialized grinders with automatic loading silos and truss manipulators. This seamless robotic integration ensures continuous, high-efficiency production without compromising micro-level accuracy.

Our automated line incorporates specific machinery dedicated to each critical grinding task:

Comprehensive Quality Control

Beyond grinding, our comprehensive automation extends to final assembly and quality control:

• Automatic Bore & Noise Testing: Every bearing is subjected to automatic bore testing and automatic noise testing to ensure flawless acoustic and dimensional profiles.
• Advanced Metrology Equipment: We utilize High-Precision Roundness Instruments, Vickers Hardness Testers, and Spectrometers to measure tolerances down to the micron.

Why KET's Process Matters to You

Whether you are sourcing deep groove ball bearings, flange bearings, or custom non-standard bearings, the manufacturing process matters. KET's integration of high-end grinding techniques with automated assembly results in bearings that offer lower noise levels, higher speeds, and unwavering consistency.

As a modern, competitive, and technological enterprise, Ningbo Kexiang Bearing Technology Co., Ltd. (KET) continues to push the boundaries of what is possible in miniature bearing manufacturing. By focusing on process perfection and automation, KET doesn't just make bearings—we manufacture peace of mind.