Introduction

The rear trunnion is a critical load-bearing connecting component for hydraulic cylinders used in engineering machinery and mining equipment. Its dimensional accuracy, coaxiality and surface finish directly determine the stability, service life and safety of the entire cylinder under heavy loads, vibration and long-term operation.

Traditional manual split machining often causes tolerance deviation, assembly jitter and premature wear of articulated parts. Today, CNC automatic machining has become the mainstream production process to address these pain points, delivering stable precision and consistent batch quality for rear trunnion manufacturing.

Core Advantages of CNC Automatic Machining for Rear Trunnion

1.Unified clamping with integrated forming

Modern CNC machining centers complete turning, drilling, milling and chamfering in a single clamping setup, eliminating positioning errors caused by repeated disassembly in conventional processing. The coaxiality and perpendicularity of trunnion mounting holes can be steadily controlled within standard tolerance ranges.

2.Stable batch consistency

Automated numerical control programs standardize cutting parameters, feed speed and tool paths. Each rear trunnion blank follows identical processing logic, which effectively reduces manual operation errors and ensures uniform quality for mass-produced parts.

3.High efficiency for customized production

CNC equipment supports rapid program switching, adapting to diversified rear trunnion specifications for general construction machinery cylinders, specialized mining equipment cylinders and customized cylinders for special equipment, and shortening sample and batch delivery cycles.

4.Optimized surface durability

Precision CNC cutting produces smooth, low-roughness contact surfaces, reducing friction loss during cylinder swing movement and slowing metal fatigue under frequent impact loads.

Professional Production Strength of Ruixin Hydraulic Machinery Co., Ltd.

Founded in 2013, Ruixin Hydraulic Machinery Co., Ltd. has been committed to innovation and development in the field of hydraulic cylinders for engineering machinery and mining equipment. After more than ten years of steady growth, the company has developed into a modern enterprise integrating R&D, production and sales of hydraulic cylinders.

The company is equipped with dozens of intelligent automated machining centers, CNC lathes and automatic welding equipment, fully supporting the full-process CNC automatic machining of rear trunnions and all key hydraulic cylinder components. It has a technical team of more than 50 experienced engineers across multiple professional fields, and maintains long-term technical cooperation with multiple universities and colleges to continuously introduce high-level technical talents and upgrade processing technologies.

Two self-built advanced semi-automatic assembly lines work in coordination with intelligent CNC workshops, forming a complete closed-loop system from raw material blanking, CNC precision machining of rear trunnions, welding and assembly to finished product inspection. Ruixin specializes in the R&D and production of general engineering machinery cylinders, specialized mining equipment cylinders and customized cylinders for special equipment. Backed by mature CNC automatic trunnion machining technology and strict manufacturing standards, its hydraulic cylinder products are widely used in construction engineering, mining and other related industries.

With reliable product performance and considerate service quality, Ruixin Hydraulic has gained wide market recognition and high customer trust, and built a solid reputation in the hydraulic cylinder manufacturing industry.

Conclusion

As the construction and mining industries continue to raise their requirements for high-load, long-service-life hydraulic cylinders, standardized CNC automatic machining of rear trunnions has become an indispensable technical guarantee for high-quality cylinder manufacturing. Manufacturers with complete intelligent CNC processing capabilities, represented by Ruixin Hydraulic Machinery Co., Ltd., are able to provide stable and customized hydraulic cylinder solutions that meet diverse working condition requirements for industrial customers worldwide.