Jindi Precision Machinery Obtains Injection-Molded Cage Patent, Ratchet-Shaped Design For Bearing Load-Limiting Rollers

July 20, 2026 Industry News

1. Jindi Precision Machinery Obtains Design Patent for Injection-Molded Cage

On June 23, 2026, information from the State Intellectual Property Office shows that Shandong Jindi Precision Machinery Technology Co., Ltd. obtained a patent for an "injection-molded cage (ratchet-shaped)," with authorization number CN310040041S and authorization date of June 19, 2026.

The patent application number is CN202530588233.7, with a filing date of September 30, 2025. The inventors are Zheng Guanghui, Zhao Peizhen, and Zheng Jinyu. The patent abstract indicates that the product is "used for limiting and carrying rollers in bearings," with the design要点 lying in the combination of shape and pattern.

2. Patent Technology Interpretation: What Problem Does the Ratchet-Shaped Cage Solve?

The cage is a key component that retains rolling elements in a bearing. Traditional cages face problems of uneven roller loading and imprecise positioning when carrying rollers, especially under heavy-load or high-speed conditions where the cage is prone to deformation or wear, affecting the bearing's overall service life.

Jindi's ratchet-shaped cage patent features a toothed structure similar to a ratchet. The core design concept is to use the toothed structure for more precise roller positioning and load distribution, ensuring each roller bears load more evenly during operation and reducing localized overload.

Although this is a design patent (rather than an invention patent), it reflects Jindi's technical accumulation and strategic direction in injection-molded cage structure optimization. Compared to metal cages, injection-molded cages offer advantages of light weight, low cost, and self-lubrication, making them an important direction for bearing lightweighting and cost reduction.

3. Jindi Precision Machinery: A Strong Player in Precision Machinery Components

Jindi Precision Machinery was established on October 9, 2016, and listed on the Shanghai Stock Exchange on September 1, 2023, with its registered and office addresses in Liaocheng, Shandong. The company specializes in R&D, production, and sales of precision machinery components, with products related to reducers, humanoid robots, and other concept sectors.

In 2025, Jindi achieved revenue of RMB 2.02 billion, ranking 26th among 82 peers in the industry. Among its main businesses, precision components revenue was RMB 1.007 billion, accounting for 49.85%; bearing cages and accessories revenue was RMB 834 million, accounting for 41.28%. Net profit reached RMB 145 million in 2025, ranking 24th out of 82 in the industry.

In March 2026, Jindi also filed an invention patent application titled "A High-Strength, Wear-Resistant Bearing Cage," with application number CN202610349634.0. This demonstrates that Jindi's technical布局 in the bearing cage field is not a one-off breakthrough but a sustained investment.

4. Injection-Molded Cage Industry Trends

Injection-molded cages are an important direction for bearing lightweighting. The global injection-molded bearing cage market was approximately $523.8 million in 2025, with annual sales of approximately 88 million units, a CAGR of approximately 5.6%, and industry gross margins generally ranging from 19% to 33%.

Compared to metal cages, injection-molded cages offer advantages of light weight (over 30% weight reduction), low cost (suitable for mass production), and self-lubrication (reducing friction and noise). The disadvantages are lower strength compared to metal cages, with limitations still present in extreme heavy-load applications.

Jindi's continued patent布局 in the injection-molded cage field demonstrates that domestic companies are moving from "capable" to "excellent." From ratchet-shaped cages to high-strength wear-resistant cages, the technology roadmap is becoming increasingly clear.