Our deep hole drilling heads are widely used in steel, petroleum machinery, hydraulic equipment, power generation, chemical industry, machine tool, weapon, automobile, ship, coal mine machinery, plastic machinery, aerospace and other industries. With high processing efficiency and good stability, the drilling head have a maximum ratio of length to diameter of more than 300, and their performance reaches the level of similar imported products. After many years of research, development and accumulation, the series of hard-to-machining materials deep hole processing special tools can be used in deep hole processing of special drill steel, stainless steel, non-magnetic stainless steel, high temperature alloy and other materials. They have helped users to solve a lot of deep hole processing problems, set up a higher brand image, and have got a lot of user praise.

Trepanning head is also named as annular drill, it is an economic, productive and high quality deep hole tool. Its productivity is more than 10 times the ordinary drill. It is better to use trepanning tool for machining the hole above 50mm in diameter. This tool is applicable to the following conditions:

• Hole diameter is 50mm above, and with the close tolerance on straightness and position precision.
• The length-to-diameter ratio of the hole is in the range of 1-75, making it the better choice to use trepanning head than other machining methods.
• The job material is very expensive and the core needs measuring and chemical analysis, and the entire core mandrel needs to be reserved.
• The machine power is not enough if drilling the big hole, so trepanning is a good choice. It is suitable for diameters ranging from 50 to 600mm (the matching tool bar should be also deployed).

Comparing to the conventional boring head, the new type has the following advantages:

• Guided by roller, with multi-point support and stable guide performance.
• The point contact between the roller and the inner wall of the workpiece reduces the friction and prolongs the service life, avoiding the trouble of replacing the guide pad frequently.
• The productivity can be increased by double.
• The size can be adjusted in the range of 5mm, requiring no replacement of parts, making operation convenient and time-saving.
• The roller adopts national standards, which is easy to acquire at reasonable prices, keeping operation costs low. This boring head has stable performance and strong user reputation.

This tool adopts single-edged indexable configuration, suitable for rough and semi-fine boring of deep hole.

This tool adopts double-edged floating configuration, suitable for fine boring of deep hole.

This rolling head is used at normal temperatures with multi-cylindrical rollers. It can produce plastic deformation on the metal surface and improve micro roughness, effectively replacing surface heat treatment and fine machining procedures. The tool is micro-adjustable, safe, and reliable.

This combined tool is a highly efficient boring and roller burnishing head, integrated with rough boring, fine boring, and roller burnishing. The tool connects with the boring rod via rectangular thread, yielding high productivity for machining tubes with uneven wall thickness at a large feed rate.