Knowing the different parts of your drill bit is important unless you want your bit to break down for your ignorance and carelessness. Each part has different function and construction that’s why each of them needs separate care. To know how it should be done, first, you should be aware (of) its functionality. When you understand each part’s contribution in making a hole, it will be easier for you to use your drill bit more efficiently.
Ok, you want to learn about the parts of drill bits. I hope you also like to know what are the best drill bits in the market.
The standard parts of an ordinary drill bit are as follows:
1. Shank: The shank is the tail end of a drill bit that is grasped by the drill’s chuck. It’s the lower area from the neck. In most cases, a general purpose arrangement is used as a bit with a shank in a three-jaw chuck and cylindrical shaft that grips a cylindrical shank tightly. Chuck combination and Different shank can deliver high performance, such as allowing greater centering accuracy, moving the bit, or higher torque.
2. Neck: It is the middle part of the shank and the bit body. Its diameter is less than the shank diameter. It is only present in a drill bit to differentiate the shank and body. That’s why it’s not necessary for a drill bit to have a neck.
3. Flutes: Flutes are the plain portion of the twisted part of a drill bit. After the cutting edge cuts through the surface, it is the flutes that make the hole and enlarges them. Flutes are one of the most important parts of the drill bit. They curl the chip very tightly for easy removal, allows the lubricants and coolant to flow down to the edge.
4. Body: From the cutting edge to the neck, the whole length is called the body of a drill bit. It contains the web, margin, point flute, cutting edge, Chisel edges, etc. The special coating (Black Oxide, Bronze Oxide, Titanium Nitride, Cobalt) usually covers the body.
5. Cutting Edge: Probably the most important part of a drill bit. The cutting edge cuts through the surface. If they are not sharpened correctly, you won’t be able to make a hole properly. The edge should be suitable to cut the material. It is important to choose a tip which will be able to cut through. For glass, you need a diamond tip, for metal, any steel tip will work.
6. Body Clearance: The portion of the bit that is usually reduced to lessen the friction between the wall of the hole and the drill. It is very efficient to decrease the heat while the drill bit is cutting through the surface.
7. Land: It is the higher part from one flute to another.
8. Chisel Edge / Dead Center: A chisel is a part of the drill bit with a characteristically designed edge of blade on end for cutting or carving a hard surface such as stone, wood or metal by hand, mechanical power or struck with a mallet. This edge is also known as dead center. This part is the first one to go through the material.
9. Chisel Edge Angle: It is the angle of the wider part of the chisel which is closer to the outer edge of the bit. The angle is different for different material.
10. Clearance Diameter: Body clearance refers to the reduced body to decrease the friction in between a drill bit and the hole that is being drilled. The width of that body clearance is called the clearance diameter.
11. Web: It is the center part of the body which joins the lands. A two-flute drill bit forms a chisel edge at its tail end.
12. Margin: Margin is the narrow strip which extends from the back at the length of flutes. It represents the full diameter of the drill bit.
13. Round Taper: It is one kind of shank that is divided into two parts. The rounded part is called taper shank. The diameter is not equal to every part of the taper. The tail end is narrower than the upper area. But it may differ according to the drill machine.
14.Tang: The other part of the split shank is Tang. It is usually flat. Tang and taper shank are for fitting in particular drill bit holder.
15. Taper length: It is the combined length of both taper shank and the tang from the neck to the end. The length is different in different type of drill machine.
16. Axis: Axis is the longest length of the drill bit that goes through the center of the circular surface area.
17. Heel: The outer edge of the chisel or cutting edge.
18. Lip length: It is the distance from the center of the chisel and the edge.
19. Lip Angle: The angle between chisel edge and the outer edge of the lip is known as lip angle.
20. Drill Diameter: It is the diameter over the margin of the bit which is measured from the point.
These are the most common parts of a drill bit. There are many more unique parts based on their structure. The complex the drill bit is, the more parts there will be. It is important to have a good idea about the parts of the particular drill bit to use them more efficiently. If you know which part is important for which purpose, choosing a drill bit will be easier for you.