1) Material Suppliers: from reliable sources like Shougang, Hangzhou Iron&steel. etc;
2) quality Control:choose the best raw material by spectrometer and strictly control the surface qualities and inner hardness and metallo-graphic structure;
3) process: Cold heading/hot forging
4)surface is treated with bluing, screw thread has two type description, one is the metric system:M12-M24-6g, another is denominator system:1/2-1/4--2A.
3. Design / Structure / Details Pics
4.Advantages / Features:
Our company has purchased steel from several large steel groups , such as Hangzhou Steel Mill, Shanghai Bashan Steel Mill, Beijing Shrugging Steel Mill whose steel have good mechanical properties and stability of chemical component. it keep the bolt to be of high strength
2). Manufacture Procession
First, we have our own High-precision Digital Machining center for mould making in special Mould Workshop, excellent mould make product beautiful appearance and its size accurately.
The second, we adopt blasting procession, removing Oxidation surface , make the surface to be bright and clean and uniform and beautiful.
The third, in heat treatment: We use the Controlled-atmosphere Automatic heat treatment Furnace, we also have four mesh belt convey furnaces, Can deal with the products in different sizes keeping the non-oxidation surface
3). The all process quality control:
The quality control is strictly performed from buying raw materials in warehouse to different machining procession and to final packing. We have Magnetic Powder Detector, Material Testing Machine, Metallographic Microscope, such testing instruments, guarantee product high quality and beautiful appearance.
4). Our production capacity
Single bolts, every month can produce 1.7 million bolts. Now we buy a Full Automatic Cool-forging Machine. this greatly enhances our production capacity with more quality and more beautiful appearance.
Established in 1998, we have developed into an international trading company supplying a wide range of construction machine spare parts and auto spare parts. We are the exclusive branch of the biggest construction machinery undercarriage manufactory in Fujian Province. Main focus: Best Service!Reasonable Price!One Purchase Stop ! Quality management procedures are conducted in accordance with international standards, and have been implemented throughout the entire production process.Keeping in ... View detail