Commodity: 4145 machined hollow bar

Manufacture method: hydraulic cold drawn, machined, deep hole boring

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

Material: ST52 or other carbon steel grades like CK45,S45C, alloy steel like SAE4140, SAE4145,42CrMo4,20MnV6,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.

Packing: Oil coating and seaworthy export packing.

Shipping: by containers.

The following services are available:

1. External surface machining

2. External surface polishing

3. External surface grinding

4. Deep hole boring

5. Bore honing

6. Skiving&roller burnishing

7. Drilling

We are of cold drawn mechanical tubings,precision tubes,cylinder tubes, as well as machining service provider.

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.