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

Bit classification: high speed steel bit, carbide bit, tungsten steel bit;

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

Size: 12mm to 160mm; drill bit

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

Suitable for motor: magnetic drill / magnetic base drill / drilling machine / lathe / milling machine, with complete types and specifications. It is suitable for various brands of imported magnetic base drill (magnetic drill), general drilling machine, milling machine, boring machine, etc.

The drilling efficiency of the product is 8 ~ 10 times higher than that of the ordinary drill bit.

The commonly used handle types of hollow drill: straight handle, universal handle, Ridong handle, overtone handle.

As the name implies, it is the name of the drill without core according to the result of cutting tool. As a cutting tool, people have used twist drill bit for more than 100 years. Because the core part of twist drill is completely negative cutting angle, the cutting resistance is very large, so 50% - 60% of the cutting force of twist drill is caused by the core drilling of the bit. In addition to the factors just mentioned, it is impossible to make the twist drill very large. To process larger and deeper holes, we must start from drilling small holes and expand step by step until the reaming size meets the requirements.

The advent of hollow drill has expanded the cutting range of drill bit. It can process large hole and deep hole with relatively small power, and can also make the size of hollow drill bit very large. Only using the better or better bit on the cutting ruler not only reduces the processing cost, but also makes possible the impossible processing technology.

Specification of hollow drill bit

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

Hollow drill is also known as coring bit, hole opener, center drill, steel plate drill, magnetic drill bit, rail drill, etc.

The specifications of hollow drill are as follows:

1. The small diameter is 12mm, and the large diameter can be 160mm;

2. The drilling depth is 25 mm, 35 mm, 50 mm, 75 mm, 100 mm, etc;

3. The cutting depth is 35mm and the diameter is 12mm to 50mm.

The cutting depth is 50 mm and the diameter is 12 mm to 160 mm.

The cutting depth is 75mm and the diameter is 16mm to 160mm.

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