Twist drills

Discover our wide range of high-quality RUKO twist drills for metal cutting. Quality and durability are top priorities for our metal drills, which is why they are often used in professional areas such as mechanical engineering, metal construction, welding technology and electronics. Whether as individual items or in sets. Coated or uncoated. HSS twist drills, HSS-Co 5 or HSS-Co 8 twist drills. Here you will find the right one for your next project.

RUKO is a leading global manufacturer of twist drills that are characterised by their exceptional quality, speed and durability. Our twist drills are suitable for a wide range of materials and applications, from steel to metal and plastic. On this page, we present the various RUKO twist drills and explain what makes them so special.

Twist drills are the most commonly used drilling tool for drilling into solid material. The twist drill is characterised by its spiral-shaped flutes. These flutes allow the chips produced during drilling to be removed. This results in a clean and precise hole. Twist drills are available in various designs and sizes to meet a wide range of requirements. Twist drills have various features and functions.

Thanks to our own new and ultra-modern production facility at the company headquarters in Holzgerlingen, in the south of Germany, we can guarantee even better quality control of the twist drills.

RUKO is known for its high-quality twist drills for metal cutting. These drill bits are specially designed to drill precise and circular holes in various metals, from steel and stainless steel to aluminium and copper. They are available in various sizes and designs, including the classic HSS twist drill. We also offer HSS-Co5 twist drills with various cobalt contents and solid carbide drills for stainless steel and other demanding materials.

HSS stands for "High Speed Steel". HSS twist drills are particularly hard and heat-resistant, which makes them ideal for drilling in hard materials such as steel and stainless steel. RUKO offers a wide range of HSS twist drills that are suitable for various applications. Here are some of the HSS twist drills that RUKO offers:

• RUKO HSS-G twist drills: The G stands for ground manufacturing process. The flute and cutting edge are ground with a grinding disc. The twist drills offer excellent hardness and wear resistance. They are ideal for drilling in general steel materials, cast iron and non-ferrous metals.
• RUKO HSS-R twist drills: These drills are roll rolled (R) and steam tempered. During production, the flute and cutting edge are moulded out of the twist drill blank. The material is hardened so that the microstructure is not interrupted, making it more elastic. This ensures increased breakage resistance and is suitable for hand drills.
• RUKO HSS-Co 5% twist drill : These drill bits contain 5% cobalt, which makes them even harder and more heat-resistant. They are ideal for drilling in hard steel materials such as stainless steel (Inox, stainless steel).
• RUKO HSS-Co 8% twist drill bits: With a cobalt content of 8%, these drill bits are even harder and more heat-resistant than the HSS-Co 5% drill bits. They are ideal for drilling in very hard steel materials, high-strength steels with low toughness and heat-resistant stainless steels.
• RUKO HSS-TiN twist drills: These drills are provided with a titanium nitride coating, which further increases their surface hardness (up to 600°C) and wear resistance, which has a positive effect on their service life. They are ideal for drilling into a variety of materials, including steel, stainless steel, cast iron and non-ferrous metals. Caution: Not suitable for aluminium. Aluminium chemically bonds with the coating. This leads to an increase in friction between the tool and the material. The chip removal or chip flow is impaired to such an extent that further work becomes impossible.
• RUKO HSS-TiAlN twist drills: With a titanium-aluminium-nitride coating, these drills offer even greater hardness and heat resistance (up to 700°C) than the HSS-TiN drills. They are ideal for drilling in very hard steel materials and heat-resistant stainless steels.
• RUKO HSS-E twist drills: These drill bits are made of high-performance high-speed steel with additional cobalt content, which makes them particularly hard and heat-resistant. They are ideal for drilling in hard steel materials and stainless steel.
• RUKO solid carbide twist drills: These twist drills are made from solid carbide K20. They are particularly suitable for high-strength steels (titanium alloys, cast iron, Hardox) at high cutting speeds.

Each of these drill bits has its own special properties and areas of application, so you should always select the right drill bit for your project or application.

• Outstanding hardness and wear resistance: HSS twist drills (HSS = high-speed steel) are made of tool steel. As an alloyed variant, it loses its hardness at an application temperature of 600 °C. This gives them high hardness and wear resistance. HSS gets its hardness from its basic structure, which consists mainly of iron and carbon. This makes them ideal for drilling in hard materials such as structural steel.
• Heat resistance: HSS twist drills are heat resistant, which means that they retain their hardness and sharpness even at high temperatures (up to application temperatures of up to 600°C), which can occur during drilling.
• Versatility: RUKO HSS twist drills are available in a variety of sizes and designs, making them suitable for a wide range of applications.
• Precision: RUKO HSS twist drills are precision manufactured to drill dimensionally accurate and circular holes.
• Longevity: Thanks to their high quality and robust construction, RUKO HSS twist drills, especially with a coating, offer a long service life, even with regular use. Cooling also increases the service life of the twist drill.
• Speed: RUKO HSS twist drills offer excellent drilling performance, resulting in faster and more efficient drilling processes.

These advantages make RUKO HSS twist drills an excellent choice for anyone looking for high quality and reliable drilling tools.

RUKO offers a wide range of twist drills that are manufactured according to various DIN standards. These standards guarantee consistent quality and performance, so you can always rely on your RUKO twist drills. Here are the DIN standardized twist drills that we offer:

• RUKO DIN 338 twist drills: These are standard twist drills that are suitable for a wide range of applications. These are twist drills with a cylindrical shank. They are available in various sizes and materials, including HSS, HSS-G, HSS-Co and more.
• RUKO DIN 1897 twist drills: These are short twist drills with a cylindrical shank that have been specially developed for drilling at shallow depths. They are available in various sizes and materials. Ideally suited for assembly work in thin-walled materials such as sheet metal, flat and profiled iron in car body construction.
• RUKO DIN 1869 twist drills: These are extra-long twist drills with a straight shank that have been developed for drilling deep holes under difficult drilling conditions (e.g. with poor chip removal). They are available in various sizes and materials.
• RUKO DIN 340 twist drills: These are long twist drills with a cylindrical shank that are ideal for drilling medium and long-chipping materials. They are available in various sizes and materials.
• RUKO DIN 345 twist drills: These are twist drills with a Morse taper shank that have been developed for drilling large diameters (10.0 - 60.0 mm) in machines with a Morse taper spindle. They are available in various sizes and materials.
• RUKO DIN 333 twist drills: DIN 333 drills are centring drills for producing centring holes.

Each of these DIN-standardized twist drills has its own special properties and areas of application, so you will always find the right drill for your specific application.

In addition to our standard twist drills, RUKO also offers a range of twist drills for special applications. These drills are specially designed to master specific tasks and challenges. Here are some examples:

• Extra long twist drills: These drills are ideal for drilling deep holes or drilling through thick materials. They are particularly useful where deep holes are often required.
• Left-hand cutting twist drills: These drills rotate anti-clockwise and are ideal for removing broken screws or threaded bolts. They are an indispensable tool in any workshop.
• Twist drills for special materials: RUKO also offers twist drills for special materials such as stainless steel, mild steel, aluminium or plastic. These drill bits are specially adapted to the properties of the respective material in order to achieve optimum results.

Whatever your specific requirements, you will find the right twist drill for metal cutting at RUKO. Our twist drills are designed to meet your specific challenges and help you get the job done quickly and efficiently.

For those who have a variety of different drilling tasks to complete, RUKO offers practical twist drill sets, usually 19 or 25 pieces. The drill bit sets contain a selection of twist drills in different sizes so that you always have the right drill for your specific task to hand.

You can choose from sets with HSS-R twist drills, HSS-G twist drills and HSS-Co twist drills. Each set is carefully put together to cover a wide range of drill diameters so that you are equipped for any task.

The RUKO twist drill sets come in a practical plastic box, some of the larger sets in sheet steel cassettes, which makes it easier to organise and transport your drill bits. With a RUKO twist drill set, you are always ready to master any drilling task.

RUKO twist drills are recognised for their exceptional quality and performance. They are manufactured from high-quality materials and undergo strict quality controls to ensure they meet our high standards. In addition, they are designed to provide optimum performance and a long service life, even under the most demanding conditions.

The correct use and care of your RUKO twist drills is crucial for their performance and service life. Always make sure to choose the right drill bit for the material and application and to guide and cool the drill bit correctly. After use, you should store the drill bit in a dry place to prevent corrosion.