Seamless tube for hollow piston rod is a kind of cold drawn seamless precision steel tubes that is externally grinded to certain OD tolerance or even grinded&polished to finished size for further hard chrome plating.

Typical sizes of tube for hollow piston rod: 

Available Steel Grades: 

Manufacture Method: Hydraulic cold drawing, Cold rolling.

Delivery Condition: cold drawn or cold rolled without final heat treating, stress relieved. 

Thickness of chromed layer: as per request.

Roughness of chromed surface: Ra0.30um max. 

OD tolerance: f7,f8,f9

Straightness: 0.5mm/1000mm max