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Hydraulic piston rod
YMT Bearings specializes in shafts, mast bearings, automotive bearings, linear guide bearings, tapered roller bearings, pillow block bearings, and deep groove ball bearings.
Customization is available, and OEM services are offered according to customer requirements.
The hydraulic piston rod is the core moving part in a hydraulic cylinder, connecting the piston and transmitting power to achieve linear reciprocating motion. It is crucial to the lifespan and reliability of the hydraulic cylinder. It requires high-precision machining, and the surface needs to be hardened (such as hard chrome plating) to improve wear resistance and corrosion resistance.
WhatsApp: +86 18863002440
E-mai: admin@yimeitebearing.com
Product Description
The hydraulic piston rod is the core moving part in a hydraulic cylinder, connecting the piston and transmitting power to achieve linear reciprocating motion. It is crucial to the lifespan and reliability of the hydraulic cylinder. It requires high-precision machining, and the surface needs to be hardened (such as hard chrome plating) to improve wear resistance and corrosion resistance. Driven by high-pressure fluid, the piston performs work, converting hydraulic energy into mechanical energy, and is widely used in lifting and engineering machinery.
1. Structure and Materials
Composition: Usually made of steel, with the surface treated by hard chrome plating or nitriding to achieve high hardness and wear resistance.
Types: Available in integral (piston and rod are connected as one piece) and separate (requiring connecting parts) types.
Key Features: A slender shaft, difficult to machine, requiring extremely high coaxiality, surface roughness (Ra0.4-0.8μm), and wear resistance.
2. Working Principle
Power Transmission: High-pressure hydraulic oil is injected into the cylinder, acting on the piston to generate thrust.
Motion Conversion: The piston rod transmits the linear motion of the piston to drive external mechanisms.
Energy Conversion: The piston rod, together with the piston, converts hydraulic energy into mechanical energy.
3. Manufacturing Process
Heat Treatment: To obtain good overall mechanical properties and prepare for surface treatment.
Surface Hardening: High-frequency induction heating to achieve high surface hardness (HRC58-62), improving wear resistance.
Precision Grinding/Polishing: To achieve extremely low surface roughness and reduce friction loss.
4. Important Role
Load Bearing and Transmission: Bears the pressure of the piston and transmits the driving force.
Precision Guarantee: Its machining quality directly affects the overall performance of the hydraulic cylinder.
Wide Application: It is a key actuator in hydraulic systems of excavators, cranes, injection molding machines, etc.
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