Drill bit shape and purpose

The shapes and uses of drill bits are very diverse. You can choose the right drill bit type according to different materials and work requirements. The following are some common drill bit types and their uses:

Twist drill: This is the commonly used hole processing tool. It is characterized by a long straight main cutting edge connected by a transverse edge, and a spiral chip groove for easy chip removal. Twist drills are suitable for drilling various metal materials.

Center drill: Used to punch the center point before drilling. The front cone has a variety of angles, such as 60°, 75°, 90°, etc., and is used in conjunction with the tailstock center of the lathe.

Superhard drill: The front end or the entire drill body is made of superhard alloy tool material, which is suitable for drilling materials.

Oil hole drill: The drill body has two small holes, and the cutting agent reaches the cutting edge through these small holes to remove heat and chips.

Deep hole drill: Straight groove type, cuts off a quarter of a round tube to produce edge chip removal, and was used for drilling gun barrels and stone-wrapped tubes.

Drill reamer: The front end is a drill bit, and the rear end is a reamer. It is used for mass production. The difference between the drill bit diameter and the reamer diameter is the allowance for reaming.

Taper drill bit: used to process the mold feed port.

Scraper drill bit: suitable for soft bottom layers.

Roller drill bit: stable operation, can drill both soft and hard formations.

Milling drill bit: mainly suitable for hard formations.

Special drill bit: such as wood ball drill bit, glass drill bit, countersink drill bit, two-in-one combination drill bit, etc., each has its specific use and design.

Impact drill: mainly used for hard materials such as tiles and concrete, with a bulge on the head and a square or round handle at the tail.

Pagoda drill: suitable for woodworking furniture manufacturing and other fields, can drill, expand, and deburr three-in-one.

Overlord drill: conquer hard materials such as wood, tiles, marble, steel pipes, concrete, etc.

Double-headed cobalt twist drill: suitable for metal materials such as stainless steel.

Hole opener: suitable for drilling holes in materials such as glass, tiles, marble, etc.

Air conditioner punch drill: suitable for drilling holes in concrete and brick walls to install air conditioners.

Electric hammer drill: based on the electric drill, a piston with a crankshaft connecting rod driven by an electric motor is added, which can drill holes in materials such as cement, concrete, and stone.

Tile drill: also known as glass drill, mainly used for drilling holes in tiles and glass.

These different types of drill bits show the diversity of drill bits in industrial manufacturing, home maintenance, and various material processing.