Drill specifications What electric drill drill bit classification complete

1. Drill specifications

A drill is a tool that rotates and has a cutting ability at the head end. It is generally milled or rolled with carbon steel SK, or high-speed steel SKH2, SKH3 and other materials, and then quenched and tempered

After heat treatment, it is used for drilling on metal or other materials. It has a wide range of use and can be used in drilling machines, lathes, milling machines, electric hand drills and other tool machines

Use.

Bit specification

Here are the drill specifications:

Specifications of various types of drill bits are shown in the table below

Drill size 180 degrees:

Two, the type of drill

A. Classification by structure

(1) Integral drill bit: the drill top, drill body and drill handle are made of the same material.

(2), end welded drill bit, the top of the drill is welded by carbide.

B, according to the diamond incompatible classification

(1) Straight shank drill: The diameter of the drill is less than 13.0mm, and the straight shank is used.

(2), taper shank drill: the drill shank is taper, and the taper is generally Morse taper.

C. Classification by use

(1), center drill bit: generally used to drill the center point before drilling, the front cone has 60°,75°,90°, etc., in order to use the tail seat support during lathe operation, the center drill should be used with 60°

Lathe tail seat top center 60° match.

(2) Twist drill: the most widely used kind of drill for industrial manufacturing, we generally use twist drill.

(3) Superhard drill bit: the end before the drilling body or all made of superhard alloy tool materials, used in the drilling of processing materials.

(4) Oil hole drill bit: there are two small holes in the drill body, and the cutting agent reaches the cutting edge part through this small hole to take away heat and chips, and the general working object of the drill is rotated, while the drill is static

Stop.

(5), deep hole drill: the earliest used in the drilling of gun barrels and stone tubes, also known as gun barrel drill. The deep hole drill is a straight groove, and a quarter of the part is cut off in a round tube

Part to produce a cutting edge to remove chips.

(6), drill reamer: in order to mass production needs, the front end is the drill, the back end is the reamer, the diameter of the drill and the diameter of the reamer is only different from the reaming allowance, and the drill is also in the screw tapping

Mixed use, so it is also called mixed drill.

(7) Taper bit: Taper bit can be used when machining the mold feed port.

(8), cylindrical hole drill: we call it the countersunk head milling cutter, the front end of this drill has a small diameter part called the rod.

(9), conical hole drill: for drilling conical holes, the front Angle has 90°,60° and other kinds of, we use the chamfer knife is a conical hole drill.

(10), triangle drill bit: a drill used in electric drill, the drill handle is made of a triangular face, so that the chuck can be fixed the drill bit.