The width of the edge line affects the sharpness and surface finish of the holes. Wider edge line has higher stability, not easy breaking, suitable for not good work environment or the material with higher content of impurity. Narrow edge line, the strength is low but higher sharpness, suitable for good drilling equipment and high surface finish working material.

Carbidedrill angle

How many different angles we have? Heygo Drills mainly have 118° and 135 two different angles. Smaller point angle will have easier centering when processing, also is not easy slipping on Non-vertical working material. Bigger point angle, the time of drill is shorter but will face bigger pressure and hard centering.

The cut chisel edge is in the middle of the drill tip, drilling into the material by extrusion, which will cause heat increased and power consumption. The length of cut chisel edge decides the drill’s sharpness. Short cut chisel, better centering, high sharpness. But these features could be effective by the web thickness.

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The point angle oftwistdrillfor general purpose is

The main cutting edge is responsible for the drilling. Longer cutting edge has higher cutting performance than the shorter one. But sometimes, the difference is small.

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Bad chips removal means higher heat generation. This will cause the drill to anneal and breakage the drill. Wider profile, flatter flute; Thinner profile, deeper flute. The depth of the flute decides the thickness of the web.

Drill point anglefor different materials

Whydrillbitangleis 118

The point angle is located in the head of the twist drill, which is measured between the two main cutting edges at the top. To center the twist drill in the material is the function of the point angle.

The running angle is 23-38. According to the market’s different material, we develop two kinds straight shank twist drill: One for general steel with 23-30 degree, the other one is for stainless steel with 35-38 degree.

This article will explain the 7 main basic features of a twist drill: Point angle, Cutting edge, Chisel edge, flute profile, Web thickness, Margin width, and helix angle, will explain how they affect in an application.

Drill point anglechart

With the above information, you may have an idea of how to choose the drill bit suitable for you. If you have any questions, please do not hesitate to contact us. The response will be within 2 hours in day-working time.

As you know, different material place different demands on the tool. So how to select of the twist drill, let’s begin from the below points.

The basic feature of the twist drill is the helix angle. The larger angle is suitable for soft material with a long chip, the smaller angle is suitable for hard cutting material with a short chip.