Hollow bit is also called coring bit, magnetic drill bit, magnetic seat drill bit and hole opener.

Classification of drills: high-speed steel drills, carbide drills, tungsten steel drills;

Cutting depth: 35MM, 50MM or 100mm;

Specification: 12MM to 160MM; bit

The main materials are high-speed steel, powder metallurgy, cemented carbide.

Suitable for motors: magnetic drill/magnetic seat drill/drilling machine/lathe/milling machine, complete types and specifications, suitable for various brands of imported magnetic seat drill (magnetic drill) and general drilling machine, milling machine, boring machine, etc.

The drilling efficiency of this product is 8 to 10 times higher than that of conventional drills.

Hollow bit commonly used handle type: straight handle, universal handle, Ridong handle, overtone handle.

As the name implies, a drill without a core is named after the result of the cutting tool. As a cutting tool, people have used twist drill for more than 100 years. Because the core part of twist drill is completely negative cutting angle and cutting resistance is very large, the cutting force of twist drill is 50% - 60% caused by the core of the drill. In addition to the factors just mentioned, twist drills can not be made very large. To process larger and deeper holes, they must be expanded step by step from drilling small holes until reaming size meets the requirements.

The advent of hollow drill expands the cutting range of the drill, using relatively small power can process large holes and deep holes, but also can make the size of hollow drill very large. Only using good or good cutting ruler just now, not only reduces the processing cost, but also changes the processing technology that is considered impossible into. Probably.

Specification of Hollow Bit

The small specifications of hollow bit are: diameter 12 mm, drilling depth 25 mm and cutting depth 35 mm.

Hollow drills are also known as core drills, openers, center drills, steel plate drills, magnetic drills, rail drills, etc.

The specifications of hollow drills are as follows:

1. Diameter is 12 mm, big can be made 160 mm;

2. The drilling depth is 25 mm, 35 mm, 50 mm, 75 mm and 100 mm, respectively.

3. Cutting depth is 35 mm: diameter is 12 mm to 50 mm.

Cutting depth is 50 mm: diameter is 12 mm to 160 mm.

Cutting depth is 75 mm: diameter is 16 mm to 160 mm.

The cutting depth is 100 mm: the diameter is 18 mm to 160 mm.