Twist Drill 7.3 mm — Type N, 135° Tip, Short, 5% Cobalt-Alloyed, HSS‑E, Fully Ground Shank, DIN 338 (MetavCUT)

The Twist Drill Type N short HSS‑E bit is a precision metal‑drilling tool with a 7.3 mm diameter and a 135° tip angle, optimised for stable drilling in hardened and alloyed steels.

• Short design for improved stability
• 135° tip for hard and stainless steels
• 5% cobalt-alloyed HSS-E for enhanced wear resistance
• Fully ground shank for precise concentricity
• Conforms to DIN 338 for reliable metal drilling

Stable short design improves drilling precision

A shorter overall length reduces overhang and significantly increases Stability during drilling. This short Twist Drill with a 69 mm spiral length and 109 mm overall length minimises deflection and vibration, so holes remain rounder and tolerances are easier to hold. The reduced cantilever makes the bit particularly suitable for workshop and machine‑based operations where repeatable accuracy is required.

Material choice and tip geometry for demanding materials

Manufactured from HSS‑E with 5% cobalt alloying, the Twist Drill offers higher red hardness and better resistance against thermal softening compared with conventional HSS. The 135° tip angle shortens the initial penetration phase and reduces walking on hard and stainless steels, enabling cleaner starts and less tool chatter. Fully ground flute geometry provides sharp cutting edges and superior surface finish on metal bores.

Suited applications and intended users

Designed primarily as a Drill for Metal, this Type N short Twist Drill is aimed at machinists, toolroom personnel and maintenance technicians working with alloyed and unalloyed steels, cast iron, non‑ferrous metals and certain plastics. For precision through‑holes and production runs on lathes or drilling machines, the combination of short length and ground geometry reduces breakage risk for diameters under 6 mm and improves handling for standard diameters like 7.3 mm.

Precision production and handling recommendations

The fully ground (HSS‑G) flute manufacturing process ensures High Concentricity and sharp cutting lips, which produce clean, accurate bores that are easier to ream or thread afterwards. Use appropriate coolant for prolonged tool life when machining steels and ensure proper clamping in a suitable drilling chuck to exploit the bit’s stability. For stationary or machine drilling, avoid excessive feed without coolant to prevent premature wear.

Strong recommendation: choose MetavCUT quality for demanding metalworking tasks and consult METAV Werkzeuge for tailored technical advice — Email: info@metav-werkzeuge.com, Phone: +49 2822 7131930, WhatsApp: +49 170 2837271

Technical Specifications — Clear data for safe selection

• Designation: Twist Drill
• Brand: MetavCUT
• SKU: 47073-FDA
• Type: Type N
• Diameter: 7.3 mm
• Spiral length: 69 mm
• Overall length: 109 mm
• Tip angle: 135°
• Material: HSS-E (5% cobalt-alloyed)
• Colour / Alloy: 5% cobalt-alloyed
• Shank execution: Fully ground
• Execution: Short
• Applicable machine: Drilling Machine
• Application: Drills for metal
• Model series: Standard Line
• Standard: DIN 338
• Manufacturer: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; info@metav-werkzeuge.com

FAQ

What is the best use for the Twist Drill (MetavCUT Type N) in workshop practice?
The MetavCUT Twist Drill Type N is primarily intended for drilling metal and performs best when used on alloyed and unalloyed steels, cast iron and non‑ferrous metals; its short design enhances stability, making it suitable for precision tasks on drilling machines.

How should the MetavCUT Twist Drill Type N be cooled and clamped for optimal life?
For longer tool life of the MetavCUT Twist Drill Type N, use appropriate cutting fluid when machining steels, keep feeds moderate, and ensure secure clamping in a concentric chuck to take advantage of the fully ground shank and avoid runout.

For what is a Twist Drill used?
A Twist Drill is mainly applied to the machining of high‑strength materials and large drill diameters. Its form allows easy resharpening and it resists higher loads, which is why it is often chosen for demanding metalworking tasks.

Which three drill types exist?
The three basic drill categories are Metal Drill, Wood Drill and Stone/Concrete Drill.

Why are Twist Drills point‑sharpened?
Point‑sharpening reduces the chisel edge at the tip of the Twist Drill, lowering frictional forces and therefore required feed; it also improves centring of the drill in the workpiece.

Can a Twist Drill be used to drill wood?
A metal Twist Drill can be used in wood, but guidance is poorer and finish less clean; however, such drills are easier to resharpen and they show less self‑feeding tendency than specialised wood bits.

At which drilling depths is the Twist Drill most commonly used?
A solid‑stock hole is typically executed with a Twist Drill. For diameters up to 20 mm and drilling depths up to 100 mm, the Twist Drill remains the most frequently used tool.

Is HSS or HSSE better?
The common assumption that HSSE steels are categorically superior to HSS is not universally correct. When choosing between HSS and HSSE, evaluate whether the working conditions justify the higher cost of HSSE.