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Twist Drill

Your Professional Twist Drill Supplier

Our goal is to become your true partner in the field of center drill in China. Zhuzuan (Chongqing) CNC Tool Co., Ltd. is a professional enterprise engaged in the research and development, production, and sales of CNC cutting tools. We have a skilled engineering team dedicated to refining every stage, from product development and process improvement to production oversight, ensuring every product delivered meets rigorous quality and performance standards.The price is competitive and the product is quality-assured, which is a good choice for your long-term cooperation.

Why Choose Us

Product application:

Our company mainly produces milling cutters, drills, reamers, boring cutters, cutting tools, etc. Our products are widely used in automobile, aviation, aerospace, mold, electronics, medical equipment and other industries.

Quality control:

Our company has passed the ISO9001 quality management system. From product design to delivery, each process is strictly carried out in accordance with the requirements of the quality management system to ensure product quality.

Our customization:

Our company can confirm drawings and communicate in advance about tool production design according to your special requirements or OEM & ODM tools, and can also provide a full set of tool processing solutions according to your various processing requirements.

Our services:

In the pre-sales stage, our team of experts will recommend the most suitable products according to the needs of customers and provide detailed technical consultation. During the sales period, we ensure timely delivery and provide installation guidance. For after-sales, we provide long-term technical support, warranty services and spare parts to help customers maximize the use of products and get reliable maintenance during use.

Advantages of Twist Drill

Versatile:

Twist drill can be used to drill holes in a wide variety of materials, including wood, metal, plastic, and more.

Easy to use:

Twist drill are simple to use and can be operated with a handheld drill or mounted in a drill press.

Widely available:

Twist drill are widely available at hardware stores, home improvement stores, and online retailers.

Cost-effective:

Twist drill are relatively inexpensive, making them an affordable option for diyers and professionals.

Variety of sizes:

Twist drill come in a wide range of sizes, making it easy to find a bit that is the right size for the job.

Specification of Twist Drill

Material	Cemented Carbide
Workpiece	Steel / Stainless Steel / Iron
Customized Support	OEM, ODM
Certificate	ISO9001

Parts Of A Twist Drill

1101SC05 Twist Drill For Aluminium And Cast Iron

Shank:

The shank is the drill's upper cylindrical smooth section utilized to grasp and drive the drill. It is tapered to allow for easy insertion into the drill chuck. The upper end of the shank is sometimes flat and is referred to as the tank

Body:

The body of the twist drill is positioned at the bottom end of the drill, running from underneath the shank to the cutting point. It has an upper end with a neck whose diameter is less than the section of the shank above the neck and the rest of the body.

DRILL POINT:

The point is the cone-shaped sharpened edge of the drill that consists of the flank face and cutting lips. The main cutting edges do the actual drilling. Even though the variations are minor, long cutting edges outperform short cutting edges in terms of cutting performance.

Twist Drill Coatings

01.

Bright finish:

The surface of drill bits with a bright finish lacks coatings that lengthen tool life and improve cutting effectiveness. The bright finish is the least expensive choice and performs well in some applications.

02.

Black oxide:

Black oxide has an improvement over the bright finish in terms of lubricity. In addition, its additional heat treatment can enhance the life of the drill bit by up to 50% over conventional. Black oxide is not a coating but a heat treatment procedure used on

03.

Titanium nitride:

Titanium is a corrosion-resistant metal that is utilized as a coating on hss drill bits to give them extremely high surface hardness levels in the form of titanium nitride, or tin. Titanium-coated drill bits can drill through difficult materials and last up to six times longer than ordinary bits.

04.

Titanium aluminum nitride:

The titanium-aluminium-nitride coating (tialn) is a versatile and globally applicable coating. Tialn is a chemical compound made up of titanium, aluminum, and nitrogen. The coating thickness ranges from 1-4 micrometers (m).

The Difference Between Straight Flute and Twist Drills

Shapes:

A straight flute bit has a long, narrow channel or flute that runs the length of the bit. The flute removes material as the bit penetrates the workpiece. Straight flute bits can have a single- or double-flute design, with double-flutes evacuating chips more efficiently.

Applications:

Straight flutes are best suited for drilling shallow holes because they don’t clear away filings or chips as efficiently as twisted drill bits. The design of straight flutes creates clean, round holes in soft, pliable, non-ferrous material. Straight flute drill bits can also extract broken bolts and fasteners.

Cutting actions:

One of the key differences between straight flute and twist drills is how they cut. Straight flutes use a shearing action, leaving a smooth finish on the hole.

1534SU03-0440 Twist Drill For Mild Steel And Stainless Steel

Application of Twist Drill

Metalworking: Twist drills are indispensable in metalworking, suitable for drilling both soft metals like aluminum and copper and medium-hard metals like stainless steel and alloy steel. Thanks to high hardness and heat resistance, twist drills are commonly found in precision machining and mass production in the manufacturing industry.

Home repairs and DIY projects: Due to their versatility, twist drills are popular for household repairs and DIY projects. They are suitable for drilling wood, plastics, and non-metals, meeting various material needs for home users. Whether it’s installing furniture, hanging hooks, or creating crafts, twist drills are a must-have tool in any home toolbox.

Construction and renovation: In construction and renovation, twist drills are used for detailed tasks like installing wiring channels, mounting brackets, and wall drilling. These scenarios require efficiency and minimal wear, making twist drills, with their high durability and thermal stability, ideal choices for construction workers and renovation professionals. Their efficiency in drilling through hard materials like metal and concrete provides an essential tool for fast, effective construction work.

Production Process of Twist Drill

Milling method:

Milling the required shape of the spiral groove with a forming cutter on the unhardened twist drill blank. The milling method has a large twist drill manufacturing processing range, mainly processing 2.5 to 70 mm twist drill.

Rolling:

The drill is rolled on a heated blank with four fan-shaped plates to form the shape of the drill bit.

Grinding:

The newest type of twist drill manufacturing processing. When the wheel speed reaches 100m/s, makes the spiral groove of the twist drill to be ground out of the whole material, high-speed grinding can reduce the cutting force, greatly improve the surface quality and reduce the shape error.

Packing and Shipping of Twist Drill

Packing	Plastic Box
Shipping	Shipped by road, sea, rail

FAQ

Q: What is a twist drill used for?

A: Twist drill bits are used for drilling through anything from wood to plastic to metal products, but not masonry and concrete products. However, their primary use is for drilling through metal.

Q: What is the difference between a twist drill and a normal drill?

A: One of the key differences between straight flute and twist drills is how they cut. Straight flutes use a shearing action, leaving a smooth finish on the hole. In contrast, twist bits have a drilling action, which means they penetrate the material in a pushing motion.

Q: What is the difference between a twist drill and a core drill?

A: The twist drill requires a huge amount of torque and drilling force, removing all of the material of that hole size, taking extra time and effort. Core Drilling means 'Drilling easier for longer'. The core drill requires minimal torque and feed pressure in comparison to a twist drill.

Q: How many types of twist drills are there?

A: Twist drill bits for automated machinery are available in carbon steel, high speed steel, carbide tipped, and solid carbide. Coatings: General purpose drill bits are available with black oxide, bronze oxide, a combination of black and bronze oxide, and TiN coatings.

Q: What is the best practice when drilling with a twist drill?

A: When drilling through holes, reduce the pressure as the bit approaches the other side of the material. This is especially important with hand drills, as the drill can easily tilt suddenly as you break through the workpiece, the flutes can catch, and the drill be torn from your hands.

Q: Is it necessary to spot drill before drilling a hole with a twist drill?

A: As a matter of fact, most manufacturers recommend against spotting either a carbide twist drill or an insertable drill, because it's easy to chip the carbide in the dimple.

Q: What is the best cutting angle for a twist drill?

A: The point angle of a general-purpose (standard) drill is 118°. This is the angle between the cutting edges (lips). This angle according to the hardness of the material to be drilled.

Q: What is the principle of twist drill?

A: Like any other cutting tool in metalworking, the twist drill works around the principle of chip formation. Chip formation is controlled largely by the rake angle of the cutting tool. Rake can be defined as the angle of the cutting face relative to the tool's axis.

Q: What is the reason for twist drill does not cut?

A: If the clearance angle is too much, the cutting edges will be weak, and if is too small, the drill will not cut. So, the optimum value of the lip clearance angle of twist drill for general purpose should be 8 to 12°.

We're professional twist drill manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to wholesale twist drill made in China here and get quotation from our factory. Good service and low price are available.

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