Hydraulic Piston Rod Features
●Tolerance on diameter: ISO f7/h8/g6
●Roundness: Half of the tolerance ISO f7
●Chrome thickness: 20micron (min)
●Hardness of the chrome layer: 800HV (min) – 1150 HV
●Surface Roughness: Ra <= 0.2 Micron
●Straightness: <= 0.2mm/m
The hydraulic piston rod is a connecting part that supports the work of the piston. Most of it is used in oil cylinders and cylinder motion execution parts. It is a moving part with frequent movement and high technical requirements. Take a hydraulic cylinder as an example, which is composed of a cylinder barrel, a piston rod (cylinder rod), a piston, and an end cover. The quality of its processing directly affects the life and reliability of the entire product. The piston rod has high processing requirements, and its surface roughness is required to be Ra0.4～0.8μm, and the requirements for coaxiality and wear resistance are strict.
Hardening
High-frequency induction hardening guarantees the surface hardness and optimum strength of the material, which makes the shaft highly durable and resistant to abrasion. We can supply several conditions as follows:
1,Hard chrome plated (surface without heat treatment)
2,High-frequency induction hardened hard chrome plated
3,Quenched and Tempered
4,Induction hardened with Q&T
Centerless grinding
Our grinding lines work at high processing speeds with optimum efficiency. Depending on material and diameter requirements, surface qualities with roughness specifications up to Ra 0.2 µm can be obtained.
Surface treatment
By hard chrome plating, your components obtain a high resistance to corrosion and wear. This means high endurance over the entire life of the product. Usually, the thickness of hard chrome plating is 10μm ~ 15μm.Resistance in front salt spray (fog) test environment according to the ASTM B-117-97 could be 36 hours.
Hard chrome plated rod (HRC 15-20)
Hardened and tempered chrome plated rod (HRC 28-30)
Induction and hardened chrome plated rod (HRC 55-60)
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