KYOEI

PRECISION

EXCELLENCE IS BUILT ON
A SOLID FOUNDATION

Japanese
Technology

Kyoei inherits the proud legacy of Nissho Industrial Co., Ltd, founded in 1965 and renowned for supplying OEM slewing rings to industry leaders such as NSK, Hitachi and Toshiba.

Since 2007, Chief Engineer Mr. Toshio Ono has partnered with Kyoei, strengthening our quality management and manufacturing processes while sharing advanced Japanese technology with our team-ensuring world-class standards in every product we deliver.

Japanese
Technology

Kyoei strictly adheres to customer requirements, ISO management systems, and production standards such as JIS (Japanese Industrial Standards) and GB/JB (Chinese National Standards). Accuracy is ensured through advanced machinery, precision tooling, regularly inspected quality control (QC), and complete tracking records for every procedure.

QUALITY

QUALITY DEFINES KYOEI,
IT DRIVES US FURTHER

Premium
Material

All our materials are fully traceable, transparent, and rigorously tested. Most of our suppliers' products are certified by renowned international and national-level companies, ensuring trusted quality at every step.

Advanced
QC Machines

Ultrasonic Flaw Inspection Machine
Insulation Block Crush Inspection Machine
Coordinate Measuring Machine
Magnetic Particle Inspection Machine
More to add.....

Unlimited
Tests

Beyond standard procedural inspections, Kyoei conducts extensive testing at every stage. We verify machine accuracy, gear tooth profiles, heat treatment outcomes, temperature stability, seal bonding strength, and more. Each step is backed by rigorous checks to ensure uncompromising quality and reliability.

Full Traceable
Record

In strict accordance with ISO standards, every Kyoei product is backed by a complete traceability system. From incoming materials and batch numbers to manufacturing data, inspection records, assembly logs, machine maintenance, and even oil consumption, every detail is documented and tracked. This comprehensive record ensures transparency, accountability, and consistent quality at every stage of production.

RELIABILITY

99.5% + PASS RATE,
100% CUSTOMER SATISFACTION

Professional
Team

Our team is highly experienced and stable. Led by Chief Engineer Chen Li, who brings over 40 years of expertise in slewing ring manufacturing, we are proud of a work force where most members have more than 25 years of industry experience and have continuously worked with us for over 15 years. This depth of knowledge and long-term commitment ensures consistent quality and innovation in every project.

Verification from third party

To ensure consistent and reliable products, we recognize that quality depends not only on manufacturing excellence but also on strong management practices. Kyoei fully complies with international management standards, supporting our commitment to quality through independent third-party verification.

Heat Treatment Process from Sumitomo (S.H.I.) Construction Machinery Company Limited

ISO 145001

ISO 14001

ISO 9001

Customer
Feedback

Kyoei products are delivered worldwide-from Asia to Europe, North America, and South America-performing reliably across diverse working conditions and applications. Over the past decade, we have achieved ZERO critical quality issues. Leading Japanese OEMs (Sumitomo, Yutani, Kato, etc.) and Chinese OEMs (Zoomlion, Jing, etc.) have consistently reported no problems, reinforcing our reputation for trusted quality and long-term reliability.

Customer’s
Needs

Size 400mm to 4000mm range
Flexible quantities: from 2 pcs to mass production
Complete production line covering material, heat treatment, and finished product
Regular material ready for urgent production and delivery
New case design supports
Design upgrade supports
On-site problem-solving supports
100% Reverse engineering