Commodity: Machined hollow bar for drill collar

Steel grade: ASTM A519 SAE4130,SAE4140,SAE4145H, EN10305-1 25CrMo4,34CrMo4,42CrMo4,etc.

Manufacture method:hydrualic cold drawn, deep hole drilling, deep hole boring,machining

Delivery condition:Normalized, Quenched+tempered.

Size: 70mm*5mm-325mm*160mm

Machining as per drawing.

Packing: oil coating, external packing by wooden boxes as oer requirement of customer.

Shipment: we suggest shipment effected by containers on FCL basis.

Based on the manufacturing capacity, the following services are available:

1. Surface Machining

2. Machining as per drawing

3. Deep hole drilling

4. Deep hole boring

5. Honing

6. Skiving&roller burnishing

We are specialized manufacturer of cylinder tubes,cylinder barrels,and cold drawn special tubing and we also provide services like machining, deep hole drilling, and deep hole boring,etc.

Guarantee&warranty: 1 year after shipment of cargo. 

Customized design is acceptable.