Drill bit is a kind of hardware widely used in our construction machinery. It is used to drill through holes or blind holes on solid materials, and can enlarge existing holes.
However, the types of drill bits we choose are different in different operating environments. The commonly used drill bits mainly include twist drill, flat drill, center drill, deep hole drill and nesting drill.
So What kind of drill is used to drill steel plates?
High speed steel bit is recommended for drilling steel plate.
In addition, when drilling, it depends on the diameter of the hole. If the hole is larger, the power of the electric drill that needs to be used will be larger.
Now there is a special steel plate drill bit (also called hollow drill bit or Annular cutter or broach cutter or core drill or core cutter ), which can drill very fast.
The connecting rod can be directly mounted on the magnetic drill, and 20 mm thick steel plates can be drilled in just a few seconds. It has obvious advantages
The steel plate drill can be divided into high-speed steel core drill (H.S.S) and cemented carbide core drill (T.C.T) according to the material.
Introduction to High Speed Steel Plate Drill(H.S.S core drill):
High speed steel for steel rail is adopted, with two series of standard type and dry wet type; With a variety of handle types, patented end tooth geometry, chip separation design, stable and reliable.
The diameter ranges from 12mm to 36mm, and the depth is 25mm and 50mm;
Introduction to carbide steel plate drill(T.C.T core drill):
The handle type of the global brand drill is fully covered, and the diameter of the standard series is from 11mm to 150mm. The cutting depth is 35mm, 50mm, 75mm, 100mm, 150mm;
The maximum diameter of customized series is 200mm, and the maximum cutting depth is 200mm;
It adopts imported high-performance cemented carbide blade with ultra-fine particles, which is strong, wear-resistant, and has excellent impact resistance. The blade is strongly bonded with a stable life guarantee; Three layer geometric blade design fully reflects the characteristics of small cutting force and good centering;
Introduction to Hollow Drill Shank Type：
While selecting the hollow drill with proper size, the rod type should be selected according to the model of the magnetic drill.
General handle types include 8 types: right angle handle, general handle, four hole handle, round cutting handle, threaded handle, P-type right angle handle, three hole handle, and flat cutting handle.
Introduction to Twist Drill:
In addition, ordinary twist drills can also drill through steel plates.
Twist drill is the most widely used tool in hole machining.
Its material is generally high speed tool steel or hard alloy.
It is mainly used for drilling machines, lathes, electric hand drills and other mechanical equipment to process different diameter hole diameters.
Twist drills are generally divided into straight shank and cone shank twist drills.
Straight shank drill: suitable for drilling small hole diameter below 13.0mm, cone or taper shank twist drill: suitable for holes with large hole diameter and torque.
Twist drill is the most widely used hole machining tool. Generally, the diameter ranges from 0.25 to 80 mm.
It is mainly composed of a working part and a handle. There are two spiral grooves in the working part, which look like twist, hence the name.
In order to reduce the friction between the guide part and the hole wall during drilling, the diameter of the twist drill gradually decreases from the drill tip to the shank, and is in the shape of an inverted cone. The helix angle of the twist drill mainly affects the size of the rake angle on the cutting edge, the strength of the blade lobe and the chip removal performance, usually 25 ° ~ 32 °. Spiral groove can be milled and ground.
The front end of the drill bit is grinded to form a cutting part by hot rolling or hot extrusion. The top angle of the cutting part of the standard twist drill is 118, the oblique angle of the transverse edge is 40 ° ~ 60 °, and the back angle is 8 ° ~ 20 °.
Due to structural reasons, the front angle is large at the outer edge and gradually decreases towards the middle.
The cross edge has a negative front angle (up to about – 55 °), which acts as an extrusion during drilling. In order to improve the cutting performance of twist drill, the cutting part can be ground into various shapes according to the properties of the material being processed (such as group drill). Twist drills have two types of shank: straight shank and taper shank. The former is clamped in the drill chuck while the latter is inserted in the taper hole of the spindle or tailstock of the machine tool.
Generally, twist drills are made of high-speed steel. Twist drills with cemented carbide inserts or crowns are suitable for processing cast iron, hardened steel and non-metallic materials. Integral cemented carbide small twist drills are used for processing instrument parts and printed circuit boards.
Introduction to Step Core Drill:
Step core drill, also known as step drill or pagoda drill, is mainly used for drilling thin steel plates within 3mm.
One drill can be used instead of multiple drills. Holes with different diameters can be processed as required, and large holes can be processed at one time without replacing the drill and drilling positioning holes.
According to the groove shape of the product, it can be divided into straight groove, spiral groove and circular groove;
At present, the whole step drill is manufactured by CBN full grinding, mainly made of high-speed steel, hard alloy, etc., with high processing accuracy requirements. According to different processing conditions, surface coating can be carried out to extend the tool life and enhance the tool durability.
Our step drills are made of super hard high speed steel.
The product diameter ranges from 4mm to 40mm.
The step combination ranges from 4 steps to 13 steps.
There are two types of spiral grooves and straight grooves.
Suitable for drilling and reaming of steel, cast iron, stainless steel and other materials;
Precision grinding with automatic equipment; The coating process can be selected.
Therefore, it is also important to select a good drill bit for drilling steel plate.
But don’t worry. If you have any questions, please feel free to contact us.
We are always ready to answer any questions for you.
We have a professional service team and production team. No matter you order regular size or need to customize, we will provide you with a full range of considerate services.
Welcome to your enquiry at any time!
Lillian Wang
Giant Tools Only the best tools we made
Tianjin Ruixin Tools & Hardware Co., Ltd.
Email: wjj88@hbruixin.net
Mob/Whatsapp: +86-18633457086
Web:www.giant-tools.com
Post time: Sep-29-2022