There are many kinds of  drill bits used in industry. The drill bits are classified according to different drilling methods. They can be divided into diamond drill bits, cone drill bits and scraper drill bits. These three kinds of drill bits are the most basic forms.

Below is a list of contents

Three basic drill bits

Other drill bits

Among the three kinds of drill bits, the cone bit is the most common and widely used in drilling, and it is also widely used. Among these three kinds of drill bits, the smallest range of use is the scraper bit.

Drill bit is the main component of drilling equipment, and its main function is to break rock and form borehole. Rotary drill bit is a kind of drill bit commonly used in the petroleum industry. Driven by the machine, the rotary drill bit rotates and drives the whole drill bit to produce centripetal movement. It cracks and breaks the rock through abrasion and plays the role of downward drilling.

In the process of drilling, the drill bit is the main tool to break the rock, and the borehole is formed by breaking the rock with the drill bit. The formation of a borehole is good or bad, and the length of time it takes is not only related to the characteristics of the rock in the drilled formation and the performance of the bit itself, but also related to the matching degree between the bit and the bit. The reasonable selection of the bit plays an important role in improving the drilling speed and reducing the comprehensive drilling cost.

In the specific drilling work, scientific selection of drill bits and reasonable determination of drilling fluid can improve the working efficiency and quality of drilling, make drilling give better play to its own value and make a certain contribution to the development of industry.

Of course, there are other drill bits, such as deep hole drill, reamer, spot facer and center drill

Deep hole drill

Deep hole drill usually refers to a tool for machining holes with a ratio of hole depth to hole diameter greater than 6. Commonly used gun drill bit, BTA Deep hole drill bit, jet drill bit, DF deep hole drill bit, etc. Nested drills are also commonly used for deep hole machining.

Reaming bit

Reaming bit has 3~4 teeth, better than fried dough twist drill, used for enlarging existing hole, improving machining accuracy and finish.

punchline

Spot facer has more cutter teeth. The hole end is processed into the required shape by forming method. It is used to process the outer end face of countersunk holes or flattened holes of various countersunk screws.

Center bit

Central drill is used for drilling the central hole of shaft workpiece. Basically, fried dough twist drill bits and small spiral drill bits are made up of small drill bits, so it is also called compound center drill.

The center drill bits is used for drill bitsing the center hole of shaft workpiece. It is essentially made up of fried dough twist drill bits and small drill bits with small helix angle, so it is also called compound center  drill bits.