A drill bit is a rotating tool with cutting ability at the head end. It is generally made of carbon steel SK, or high-speed steel SKH2, SKH3 and other materials through milling or rolling, quenching, tempering heat treatment and grinding. It is used for drilling holes on metal or other materials. It has a wide range of uses and can be used on drilling machines, lathes, milling machines, hand drills and other machine tools.
Types of drill bits:
A. Classification by structure
(1) Integral drill bit: The drill head, drill body and drill shank are made of the same material.
(2) End-welded drill bit: The drill head is welded with carbide.
B. Classification by drill shank:
(1) Straight shank drill bit: Drills with a diameter of less than ψ13.0 mm all use straight shanks.
(2) Taper shank drill bit: The drill shank is tapered, and the taper is generally a Morse taper.
C. Classification by purpose
(1) Center drill bit: Generally used to drill the center point before drilling. The front end taper surface is 60°, 75°, 90°, etc. When operating on a lathe, in order to use the tailstock support, a 60° center drill should be used to match the 60° center of the lathe tailstock.
(2) Twist drill bit: The most widely used drill bit in industrial manufacturing. We generally use twist drill bits.
(3) Superhard drill: The front end or the entire drill body is made of superhard alloy tool material and is used for drilling holes in processing materials.
(4) Oil hole drill: The drill body has two small holes. The cutting agent reaches the cutting edge through these small holes to remove heat and chips. When using this drill, the workpiece generally rotates while the drill is stationary.
(5) Deep hole drill: It was first used for drilling holes in gun barrels and stone-encased tubes, and is also called a gun barrel drill. The deep hole drill is a straight groove type, which cuts off more than a quarter of a round tube to produce cutting edge chips. (6) Drill reamer: In order to meet the needs of mass production, the front end is a drill and the rear end is a reamer. The diameter of the drill and the reamer differs only by the allowance for reaming. There are also drills that are used in combination with screw tapping, so it is also called a mixed drill.
(7) Taper drill: Taper drills can be used when processing mold feed ports.
(8) Cylindrical hole drill: We call it a countersunk milling cutter. The front end of this drill has a smaller diameter part called a guide rod.
(9) Conical hole drill: It is used to drill conical holes. Its front end angles are 90°, 60°, etc. The chamfering cutter we use is a type of conical hole drill.
(10) Triangular drill: A drill used in electric drills. Its drill shank is made into a triangular surface so that the chuck can firmly fix the drill bit.
The above drill principle specifications and types are hoped to be helpful to you. For more wholesale and customization of drill bit chucks, please contact Longzhou Li. We have been professionally producing chucks for 16 years, with an accuracy of 0.003MM, thread grinding and forming, and a lifespan of 600,000 times.