Custom Precision Solid and Tungsten Carbide Twist Drill Bits for Metal
As one of the most professional carbide twist drill manufacturers and suppliers in China, Heygo offers many different types of custom precision solid carbide and tungsten carbide twist drills to our wholesale customers with OEM & ODM service and advantages of:
Free carbide twist dill bit samples for your test and reference.
ODM & OEM service for your own brand with your LOGO, packaging, and company information.
Perfect technical guidance and 7*24-hour efficient feedback service
Twist drills are the most widely used of all drill types. They can be used to drill anything from wood, plastic, steel, and concrete. Twist drill bits are most commonly used for metal drilling, and most of the twist drills are made of high-speed steel and carbide steel.
Carbide twist drills are made of cemented carbide, which is a hard material widely used as cutting tool material and other industrial applications. It consists of cemented carbide fine particles, which are bonded into a composite material by a binder metal.
Most of the time, carbide twist drills will leave a better surface finish on the workpiece and will be processed faster than high-speed steel twist drills.
Carbide twist drill bits usually have superior performance for drilling hard materials (such as carbon steel or stainless steel) and other cutting tools that will wear faster (such as high-volume production).
Solid Carbide Twist Drill
The solid carbide twist drill is the top drill bit that allows you to drill holes in many kinds of metal. And it is ideal for excellent process safety, manufacturing economy, and good hole quality. Solid carbide twist drill bit can be used for drilling all alloy and non-alloy steels, ferrous and non-ferrous metals.
Tungsten carbide gives the twist drill bit higher resistance and higher hardness. And tungsten carbide is formed from a mixture of tungsten and carbon.
Tungsten carbide twist drill bits are mainly used for drilling concrete, granite, sand-lime brickwork, natural stone, soft metals, and non-ferrous metals.
Optional carbide twist drill coatings you can choose
Generally, the carbide twist drill coatings include TiN, TiCN, TiAlN, TiSiN and AlTiSiN
TiCN (Titanium Carbon Nitride)
TiCN coating, blue-grey in colour, has a hard, smooth finish that offers improved wear and built-up edge resistance.
TiCN coated carbide twist drills are mainly used for drilling cast irons, high silicon aluminium alloys, copper, and all abrasive materials.
Hardness (Vickers): 3000 (87 Rc)
Oxidation Temperature: 400°C (750°F)
Friction Coefficient: .45
Thickness: 2-4 microns
Surface Roughness (μm): .17
TiAlN (Titanium Aluminum Nitride)
TiAlN coating, purple-black. The main feature is that in the processing of high-heat workpieces, it has a higher feed rate, improved production, and longer service life.
TiAlN coated carbide twist drills are mainly used for milling of high strength steels, hard die steels, and high-temperature alloys materials.
Hardness (Vickers): 2800 (85 Rc)
Oxidation Temperature: 800°C (1450°F)
Friction Coefficient: .70
Thickness: 2-4 microns
Surface Roughness (μm): .40
TiN (Titanium Nitride)
Titanium Nitride coating, the gold color. The excellent wear resistance, thermal stability, and low coefficient of friction reduces built-up edge and thus improves thermal transfer of heat away from the tool. TIN coated twist drill bits can be run at higher speeds than uncoated twist drills. It can increase the twist drill life.
Hardness (Vickers): 2300 (81 Rc)
Oxidation Temperature: 550°C (1050°F)
Friction Coefficient: .65
Thickness: 2-4 microns
Surface Roughness (μm): .20
AlTiN(Aluminum Titanium Nitride)
AlTiN coating, black colour. It is much harder and smoother than TiAlN. AlTiN is designed for high-temperature working applications (>800ºC).
When there is no chip problem, AlTiN coated carbide twist drills can be used for wet grinding of titanium alloy, high-temperature alloy, and other abrasive materials
Hardness (Vickers): 4500 (90 Rc)
Oxidation Temperature: 800°C (1450°F)
Friction Coefficient: .45
Thickness: 2-4 microns
Surface Roughness (μm): .15
Commonly Asked Questions About Carbide Twist Drills
What is carbide twist drill bit?
The carbide twist drills are a type of cutting tool which is made by carbide, with high hardness, can drill with high cutting parameter.
What is a carbide twist drill bit used for?
The carbide twist drills are often used on the CNC processing center to make holes, can give high-efficiency drilling.
Which is harder carbide or cobalt twist drill?
A carbide twist drill is harder and its hardness is about 89-92.8HRC. Cobalt twist drill hardness is generally 66-67.5 HRC. So carbide is harder than cobalt.
Which is better HSS or carbide twist drill?
The advantage of carbide twist drill is its cutting speed, but the HSS twist drill is lower cost.
From the usage, the carbide twist drill has higher efficiency, they can drill more holes. Due to the high cost and customer working equipment, should give the customer’s different proposal.
Is tungsten carbide poisonous?
No, it is non-poisonous.
Is carbide harder than HSS?
Yes, the carbide twist drill is about 89-91.2HRC. But the HSS drill is generally- 64-66HRC.
What is the difference between carbide and tungsten carbide twist drill?
The tungsten content is generally 15-25%, and the solid carbide is sintered by a powder metallurgy process with tungsten carbide as the main body and cobalt or other bonding metal, and the tungsten content is generally above 80%
How much is a carbide drill bit?
It’s 5$-40$. Mostly the prices are based on the different size, length and with coolant hole or not
Need Help For OEM & ODM Custom Carbide Twist Drill price?
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Learning how to choose the best carbide twist drill is not as easy. Especially as you choose from the simple HSS twist drill to the vast array of solid carbide drills, indexable insert drill, and multi-function carbide drills, the choices can be overwhelming.
Here are some factors to consider when choosing a carbide twist drill
1. Application.
If you are only drilling a few holes in mild steel and the time requirements are insignificant, the HSS twist drill would likely work just fine. However, with tougher tool steels, such as H-13, S-7, A-6, D-2, or 420SS, the carbide drills will be better.
2. Size of drilling hole.
For the size of drilling holes under .5 inch. The solid carbide twist drills will be required. Solid carbide is available in an almost unlimited size range.
3. Budget.
The drill bits can be costly and must be justifiable to make sense. There is also a tendency to use more than is necessary when the tool crib is full of helpful, shiny new cutting tools. From Heygo Tools, you will get many different types of drill bits with a cost-effective price for your various budgets.
4. Surface Treatment
Surface finish requirements play an essential role in the selection process of the twist drill. Generally, the solid carbide drills leave an excellent finish, but for larger holes, the indexable inserts drills can also do an excellent job.
5. Coatings for carbide twist drills.
According to the application situation, the coatings suitable for cemented carbide twist drills can be roughly divided into the following five types:
Uncoating (Bright):
Uncoated twist drill bits are the cheapest and are usually used for soft materials such as aluminum alloys and mild steel.
Tin Coating:
Titanium(TIN) is the most common coating material and is not suitable for processing materials with high hardness or processing temperature.
TiCN coating:
TiCN is developed from TiN and has a higher heat resistance and wear resistance. Its color is usually purple or blue.
TiAlN coating:
The TiAlN coating is more resistant to high temperatures than all the above coatings so that it can be used in high-temperature environments, such as high-temperature alloys. It is also suitable for the processing of steel and stainless steel. Still, due to the elemental aluminum, chemical reactions occur when processing aluminum, so it cannot be used for aluminum-containing materials.
5. Geometric Features
The geometric characteristics of the drill bit can be divided into the following three parts:
The length of the twist drill bit.
The length and diameter are relatively small, and the rigidity is excellent. The drill bit has a suitable chip evacuation length, and the chip evacuation length is as short as possible, which can increase the rigidity during the processing and thereby prolong the service life of the tool. If the flute is not long enough, the drill bit may be damaged.
Drill point angle
A point angle of 118 degrees is probably the most common angle in processing and is usually used for soft metals such as mild steel and aluminum. Often, this design does not have an automatic centering function, which means that the centering hole must be machined first. The 135-degree angle usually has a self-centering function, because there is no need to process the centering hole, so it is no longer necessary to drill the centering hole separately, thereby saving a lot of time.
Helix angle
For most materials, a helix angle of 30 is the right choice. However, for environments that require better chip removal and improved cutting edge strength, a smaller helix angle is better. For materials that are difficult to process, such as stainless steel, a larger helix angle can be selected to transmit torque.
