Twist Drill — Type N, 7.1 mm Ø, 135° tip, short design, 5% cobalt-alloyed, HSS‑E, DIN 338

A Twist Drill in a short execution designed for precise metal drilling in Drilling Machines.

• Short design for increased stability
• 7.1 mm diameter for precise hole making
• 135° tip angle for hard materials
• HSS‑E with 5% cobalt for heat resistance
• Fully ground shank for high runout accuracy

Greater Precision and Reduced Deflection for Metalworking

The Twist Drill short design minimises the exposed length outside the chuck, delivering noticeably higher stability and reduced tendency to bend during operation. This results directly in more accurate hole positions and cleaner hole edges when machining metal. For demanding tasks where positional accuracy matters, the shorter projection reduces chatter and improves repeatability on both hand-operated and machine setups, making this bit suited to precision assembly and component manufacture.

Improved Cutting Performance in Tough Materials

Manufactured from HSS‑E with 5% cobalt, this bit offers enhanced red hardness and wear resistance compared with standard HSS. The 135° tip angle is optimised for penetrating harder materials and reduces the initial cutting forces, which helps when working with stainless steel or other high-strength alloys. Type N spiral geometry provides a classic flute form that balances chip evacuation and surface finish, allowing longer runs under intermittent cooling without sacrificing hole quality.

Conforms to DIN 338 for Reliable Machine Use

Compliance with DIN 338 ensures the geometry and dimensions meet recognised industry norms for short twist drills. The design is intended for use in a Drilling Machine and is appropriate for drilling alloyed and unalloyed steel, cast iron, non‑ferrous metals and selected plastics. For users requiring standardised tooling that fits common holders and drilling setups, the adherence to this norm simplifies tool selection and inventory management.

Workmanship, Shank Design and Practical Benefits

A fully ground shank and precision flute grinding yield high concentricity and sharp cutting edges, which produce cleaner bores and reduce rework. The overall length of 109 mm with a spiral length of 69 mm keeps the tool compact while maintaining sufficient flute volume for chip removal. Supplied as part of the Standard Line series, this short twist drill is particularly well-suited to repetitive production tasks on stationary and portable drilling equipment where tool rigidity and hole quality are priorities.

Strong recommendation: Choose MetavCUT’s Twist Drill Type N for robust, precise metal drilling — for technical advice or to confirm suitability for a specific task, METAV Werkzeuge offers expert consultation via eMail info@metav-werkzeuge.com, phone +49 2822 7131930 and WhatsApp +49 170 2837271

Technical Data

• Designation: Twist Drill
• Brand: MetavCUT
• SKU: 47071-FDA
• Diameter: 7.1 mm
• Tip angle: 135°
• Type: Type N
• Execution: short
• Colour: 5% cobalt-alloyed
• Material: HSS‑E
• Spiral length: 69 mm
• Overall length: 109 mm
• Shank execution: fully ground
• Model series: Standard Line
• Norm: DIN 338
• For drilling machine: Drilling Machine
• Application: Drills for metal
• Manufacturer: MetavCUT
• Hersteller: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; info@metav-werkzeuge.com

FAQ

What are Twist Drills used for?
Twist Drills such as the MetavCUT Type N are primarily applied to the machining of high‑strength materials and larger drill diameters; their geometry is relatively easy to re‑grind and they withstand significant loads, making them suitable for demanding metal‑working tasks.

Which three drill types exist?
Common categories are metal drills, wood drills and stone/concrete drills; the MetavCUT Twist Drill belongs to the metal drill group and is optimised for ferrous and non‑ferrous materials.

Why are Twist Drills tipped?
Tipping reduces the cross‑cut at the point of the Twist Drill, which significantly lowers friction and the required feed force; this sharpening also improves centring of the tip in the workpiece for more accurate starts.

Can a Twist Drill be used for wood?
A metal Twist Drill like the MetavCUT Type N can be used in wood, but guidance and surface finish are typically inferior compared with dedicated wood drills; however, metal bits are easier to re‑grind and show less self‑feeding.

At which drilling depths is the Twist Drill most commonly used?
A through hole is typically executed with a Twist Drill; for diameters up to approx. 20 mm and depths up to 100 mm, the Twist Drill is the most frequently used tool for machining solid material.

What is better, HSS or HSSE?
The general assumption that HSSE is inherently superior to HSS is not universally true; selection should consider specific working conditions to determine whether the higher initial cost of HSSE (or HSS‑E) is justified for the application.