Commodity: hydraulic cylinder barrel

Bore size range: 40mm-300mm

Steel grade: ST52,E355,E410,E470,20MnV6,SAE1020,SAE1026,SAE1045

Manufacture method: cold rolled,hydraulic cold drawn,hot rolled+deep hole bored.

Delivery condition: Cold drawn without final heat treating,stress relieved,annealed.

Bore treatment: honing,skiving&roller burnishing

Bore roughness:Ra0.25um or Ra0.35um max

ID tolerance: H8 or H9 at the option of the buyer. 

Straightness: 0.8mm/1000mm max

Packing: by plywood boxes.