As a professional piston manufacturer, Zhengji fully understands that every engine and every applica...
Production 
Equipment
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Specifications
Company 
Establishment
                    
                        ABOUT zhenji
                        We possess a complete production chain from blank casting to finished piston manufacturing, equipped with over 200 advanced production machines, including more than 80 high-precision CNC lathes. During the piston manufacturing process, we employ both casting and forging techniques to ensure durability and performance. The forging process provides pistons with greater strength and wear resistance, while the casting process offers higher production efficiency and flexibility.
Established a piston ring factory and successfully acquired a state-owned entity, inheriting its technical heritage and manufacturing foundation, which laid a solid groundwork for the company's subsequent development.
The piston company was formally established, focusing on the R&D and manufacturing of motorcycle piston products, mainly serving the domestic after-sales maintenance market.
Established original equipment manufacturing (OEM) supporting partnerships with renowned domestic motorcycle manufacturers such as Zongshen Group. Simultaneously, it expanded into the garden machinery product line and reached supporting supply agreements with enterprises including Zhongma Group.
Entered the international market, expanding its business to Southeast Asia, South America, the Middle East, Africa and other regions. It achieved the coordinated development of the domestic after-sales market, export OEM, and original equipment supporting business.
Further enriched its product portfolio, successfully developing piston products for drone engines and automobile engines, and entering the field of new engine components.
Launched the R&D and production of forged pistons and marine pistons, continuously promoting process and technological upgrading, expanding the high-end market, and establishing cooperation with more world-renowned brands.
                    Product Categories
                
                                As a professional piston manufacturer, Zhengji fully understands that every engine and every applica...
                                As a professional piston manufacturer, Zhengji specializes in the research, development, and product...
As a professional automotive piston manufacturer, Zhengji is dedicated to providing high-quality aut...
                                As a professional piston manufacturer, Zhengji provides high-performance outboard engine pistons for...
Zhengji's pistons for gardening tools are designed for high-frequency starts and stops and complex o...
As the core components of an engine, engine parts play a vital role in its overall operation. Every ...
                        Manufacturing Capabilities
                    We are equipped with advanced production lines covering mold development, casting, CNC machining, surface treatment, and heat treatment. From raw material to finished parts, every step is controlled under a rigorous quality management system.
                            The piston is a core component of the engine. It reciprocates in the cylinder, compresses the air-fuel mixture, and drives the crankshaft to rotate with ignition, providing driving power for the motorcycle.
                            The piston reciprocates in the engine cylinder, completing the four-stroke cycle of intake, compression, power, and exhaust. It converts the thermal energy from fuel combustion into mechanical energy to drive the car.
                            The piston completes energy conversion through reciprocating motion in the cylinder, providing core power for small equipment such as lawnmowers and small generators, adapting to their needs for low power and compact structure.
                            The piston is a key component of the engine in agricultural machinery (e.g., small tractors, harvesters). It drives the engine to operate through reciprocating motion, providing power support for agricultural operations like farming and harvesting.
                            The piston plays a core role in energy conversion. It transmits power to subsequent working components through reciprocating motion in the cylinder, adapting to power needs in multiple scenarios.