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This section provides an overview for center drills as well as their applications and principles. Also, please take a look at the list of 10 center drill manufacturers and their company rankings. Here are the top-ranked center drill companies as of December, 2024: 1.Asha Traders, 2.Guhring, Inc., 3.Muraki co.,ltd..
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A center drill is a type of cutting tool used in machine tools.
Although center drills are used for positioning before drilling a pre-drilled hole, they are often used for purposes other than positioning due to their versatility.
A locating hole is a hole used to support a workpiece when machining a cylindrical workpiece (shafts) on a lathe or cylindrical grinder. Since the locating hole is the base of the pre-drilling process, it must be highly accurate and free from bends and distortions. Therefore, the center drill is more rigid than an ordinary drill and is less prone to misalignment during drilling.
Center drills are used to drill a center hole in the end face of a cylindrical workpiece (shaft). In addition to drilling center holes, center drills are used in the following situations:
A center drill is used to drill a hole precisely when drilling. When starting drilling, the tip of the drill may be shaky, and in such cases, a center drill can be used to prevent shaking.
Center drills are available with 60°, 75°, 90°, and R-shaped edges, which can be used for chamfering.
Through-holes can be drilled into thin plates. This eliminates the need for a pre-drilling process and allows chamfering after drilling in one step, thus shortening the work time.
Center drills have a short overall length, a thick shank, and high rigidity. When machining with an ordinary drill, the tip of the blade shakes when the blade bites into the workpiece, affecting the accuracy of the drilling position. Center drills with high rigidity have very little blade shake. Types of center drills are as follows:
The short, small-diameter portion of the cutting edge is followed by a 60° taper portion. The tapered part is also available in 75° and 90° versions.
A short, small-diameter section of the cutting edge is followed by a 60° taper section, which is followed by a large chamfer cutting edge as the third step. This serves to protect the center hole during machining and setup.
The short, small-diameter portion of the cutting edge is followed by a 60° tapered portion, and then a blade is attached to the third step in the form of a counterbored edge. The counterbored portion serves to protect the center hole in the same way as the chamfer of Type B.
The taper portion next to the short small-diameter portion of the cutting edge has an R. Because of the R, the contact with the center is a linear contact. Even when the angle of the taper does not match or the shaft center is off-center, linear contact can be used to support the workpiece. It is often used for precision machining of small workpieces.
It is important to pay attention to the depth of the center drill when using a center drill for positioning.
If the center drill depth is too shallow, the accuracy of the pre-drilled hole will be reduced and chamfering will have to be performed again after the pre-drilled hole is drilled, which is not efficient.
On the other hand, if the center drill is too deep, the load on the center drill will increase, and in the worst case, the center drill may break if it is drilled too deep beyond the taper section, so be sure to complete drilling in the middle of the taper section.
In addition, if you calculate the machining depth so that the chamfer portion remains in consideration of the diameter of the pre-drilled hole and then perform positioning drilling, the chamfering work after drilling can be eliminated, allowing for more efficient hole drilling.
The rotation speed of a center drill is generally 1,000 rpm.
For widely used steel materials such as S45C and SS400, a speed of around 1,000 rpm is fine, but when drilling very hard steel materials such as die steel, the rpm should be reduced to around 500 rpm and the feed rate should be slowed down. When the material is hard, a cemented carbide center drill may be used.
The material used for center drills is generally HSS (high-speed steel), but cemented carbide can also be used for machining hard steel materials such as die steel.
*Including some distributors, etc.
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Guhring, Inc. is an American manufacturer of round shank cutting tools established in 1978 as a subsidiary of German company Guhring KG, which was originally founded in 1898. Headquartered in Brookfield, Wisconsin, the company produces various taps, end mills, drills, and reamers, as well as tool holders and countersinks. These are utilized in the manufacturing and engineering processes of clients in the industrial sector, including tool and mold making, power generation, and construction. Guhring, Inc. owns over 1,000 patents, and produces more than 40,000 different cutting tools that it distributes via other subsidiaries in the Guhring KG network.
UNION Tool Co., established in 1955 is a manufacturer and retailer of cutting tools, linear motion products, sensor products, and measuring instruments based in Tokyo, Japan. The company offers tungsten carbide-made cutting tools such as MDP drill pointer, OPTECH-M non-contact drill diameter, and ring setting machines. The company also has a rolling dies/ forging tools/ coating rods product segment which includes various products including screw manufacturing dies, rack dies, rolled products, and roll dies & incremental dies. Their products are used in PCB drill development, and machine tools & semiconductor manufacturing applications.
Uttam Tools, established in 1997, is a manufacturer and exporter of Carbide Tipped and H.S.S. Metal Cutting Tools based in Maharashtra, India. The company's range of cutting tools and accessories includes Industrial Step Drills and Cutters, solid Carbide Reamers, and Cooland Feed Drill. Uttam Tools are widely used in Automobile, Defence engineering, Paper, and Plastic industries. Uttam's major customers include Mahindra and Mahindra, TATA Motors Ltd, and Bharat Forge, and has ISO Certification.
Asha Traders, a company founded in 1965 in Mumbai, India, is a manufacturer and supplier specializing in cutting tools, drilling tools, and carbide cutting tools. The company manufactures high-precision cutting tools including custom carbide step drills, end mills, and offers coatings, re-grinding, and design services. These products are used in various industries including automotive, defense, aerospace, hydraulics, and medical devices. The company's capabilities are enhanced by additional services such as laser etching, coatings, and re-grinding. The company encourages the development of emerging businesses and facilitate the advancement of established enterprises.
JD Cutting Tools, founded in 1981, is a manufacturer and supplier located in Maharashtra, India, specializing in the production of high-precision cutting tools. The company manufactures high-precision cutting tools including custom carbide step drills, jobber drills end mills, and more. These products are used in various industries including automotive, defense, aerospace, hydraulics, and medical devices. The company’s offerings also include laser etching, coatings, and re-grinding services and custom solutions to meet specific applications and customer requirements.
Rohit Industries Group (P) Ltd is a manufacturer of cutting tools since 1963 based in Delhi. The company deals in Drilling, Milling, Lathe, Press, and Tapping tools along with the making of Router Bits these products help machine materials like Alloy Steel, Stainless Steel, Titanium, Cast Iron, Nicker alloys, and other materials. They even make bits with varying HSS material grades for various applications but overall, these tools serve the aerospace, automotive, general manufacturing, and die and cut industry to name a few.
YIH TROUN ENTERPRISE CO., LTD. (YT) is a manufacturer of indexable cutting tools established in 1977 and based in New Taipei City, Taiwan. The company's product lineup includes various saw blades, thread milling and T-slot cutters, and a range of drills including center and spot models. They offer over 4,500 different products and 30 patented designs. YT's indexable tools have applications in various markets including mold and die creation, metalwork, and the medical device industry.
Muraki co.,ltd., founded in Osaka, Japan, in 1906 is a manufacturer and supplier of machinery parts and tools. The company's product portfolio includes Tool bits, Cutting tools, Industrial brushes, Measuring equipment and tools and diamond pastes. The company serves markets including Medical and Healthcare, Aerospace and Defense, Consumer Goods, Industrial Manufacturing and Construction and Building. The company also provides services including national distribution, product selection, customized services, technical support and customer service.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Asha Traders |
22.4%
|
| 2 | Muraki co.,ltd. |
14.3%
|
| 3 | Guhring, Inc. |
12.2%
|
| 4 | Rohit Industries Group |
10.2%
|
| 5 | YIH TROUN ENTERPRISE CO., LTD. |
10.2%
|
| 6 | Mascot Solution |
8.2%
|
| 7 | UNION TOOL CO. |
8.2%
|
| 8 | Accusharp |
6.1%
|
| 9 | JD Cutting Tools |
6.1%
|
| 10 | Uttam Tools |
2.0%
|
Derivation Method
The ranking is calculated based on the click share within the center drill page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
India
|
6 | 60.0% |
|
Japan
|
2 | 20.0% |
|
United States of America
|
1 | 10.0% |
|
Taiwan
|
1 | 10.0% |
235 products found
235 products
UNIKA CO., LTD.
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