We manufacture both machined hollow bar and cold drawn hollow bar with plain ends for various application like hydraulic cylinders,mechanical structural use,etc.

Commodity: sae4140 cold drawn hollow bar

Manufacture method: hydraulic cold drawn, machined

Size range: 12mm - 400mm (OD), Length: 3000mm max.

Material: ST52 or other carbon steel grades like CK45,S45C, alloy steel like SAE4140, 42CrMo4,20MnV6,etc.

Delivery condition: cold drawn, stress relieved,Q+T,hard chrome plated.

Chemical composition:

Further treatment:

We can manufacture both cold drawn hollow bar with plain ends and machined hollow bar in accordance with drawings or design.

FOR COLD DRWAN ROUND BARS (+C):

Size range: 60mm-325mm (Diameter), Length: 12800mm.

OD tolerance:

Straightness:

FOR COLD DRAWN ROUND BARS (+SR):

Size range: 60mm-325mm (Diameter), Length: 12800mm.

OD tolerance:

Straightness:

 

Packing: we will ensure seperate seaworthy packing for piston rods.  

Shipping: by containers.

External machining or grinding, internal honing, internal threading,hard chrome plating,.

We are ISO9001-2008 certified manufacturer of tubes and hollow piston rods for hydraulic cylinders and hydraulic cylinder barrels.

Payment method: 30% deposit,balance before shipment or against copy of B/L or L/C at sight.

Delivery time: within 50 days.

MOQ: 3 tons for each size.

Trade term: FOB,CFR,CIF,DAP.

Third party inspection or customer's inspection is acceptable.