Twist Drill (Spiralbohrer) — Type N short · 8 mm · 135° · HSS‑E · DIN 338 · 5% cobalt‑alloyed · Fully Ground — MetavCUT

The Twist Drill Type N short 8 mm is a precision metal‑drilling bit for use in a Drilling Machine, designed for stable, accurate holes in hard materials.

• Short design for improved stability and precision
• 8 mm HSS‑E geometry for hard and alloyed steels
• 135° point angle for reduced walking in stainless steel
• Fully ground shaft for high concentricity and clean holes
• Manufactured to DIN 338 for metal machining reliability

Precise material and cutting performance for demanding metalwork

This short Twist Drill is made from HSS‑E (High Speed Steel with cobalt) and features a 5% cobalt‑alloyed composition that increases hot hardness and wear resistance. The shorter overall length reduces cantilever action, which directly improves stability and reduces the risk of deflection during machining. For operators who require consistent hole quality in tough materials, the cobalt‑enriched steel provides longer tool life under elevated temperatures compared with standard HSS.

Designed for stable, accurate drilling in hard materials

The Type N geometry with a 135° point angle is optimised for harder substrates such as stainless steel and alloyed steels; the flatter point decreases the tendency to dig in and shortens the initial plunge time. Because the bit is fully ground, it delivers excellent runout accuracy and very sharp cutting edges, resulting in cleaner holes with minimal burr formation. These characteristics are particularly valuable for precision work on components where hole accuracy matters.

Practical advantages and typical uses in workshops

Short twist drills to DIN 338 are especially suited to bench and machine drilling operations where rigidity is available—examples include drilling in alloyed and unalloyed steel, cast iron, non‑ferrous metals and certain plastics. The reduced overhang makes setup easier and safer on both stationary and portable drilling equipment. Users benefit from fewer broken tools when observing recommended feeds, speeds and adequate cooling, particularly for diameters below 6 mm; for the 8 mm size here, appropriate cooling extends life and improves surface finish.

Recommendations for machining and tool handling

When using this short, fully ground twist drill, clamp the workpiece securely and use a Drilling Machine with proper alignment. Start with a centre or pilot mark when high positional accuracy is required and apply cutting fluid for prolonged tool life when machining stainless or high‑strength alloys. The rolling or grinding manufacturing method affects regrindability: fully ground bits offer superb initial sharpness and repeatable geometry, but they can be more brittle—regrind carefully and avoid excessive heat build‑up during sharpening.

MetavCUT recommends this short HSS‑E Twist Drill for precision metal applications; for personalised advice or additional technical data contact METAV Werkzeuge at info@metav-werkzeuge.com, phone +49 2822 7131930 or WhatsApp +49 170 2837271 — expert consultation is available.

• Designation: Twist Drill
• Brand: MetavCUT
• SKU: 47080-FDA
• Diameter: 8 mm
• Spiral Length: 75 mm
• Overall Length: 117 mm
• Point Angle: 135°
• Type: Type N
• Material: HSS‑E (High Speed Steel with cobalt)
• Finish / Version: short
• Shaft Finish: fully ground
• Colour / Alloy: 5% cobalt‑alloyed
• For Use In: Drilling Machine
• Norm: DIN 338
• Model Series: Standard Line
• Application: Drills for metal
• Manufacturer: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; info@metav-werkzeuge.com

FAQ

What materials is the Twist Drill by MetavCUT Type N suitable for?
The MetavCUT Twist Drill Type N is intended primarily for metalworking: alloyed and unalloyed steels, cast iron, non‑ferrous metals and certain plastics; the HSS‑E composition and 135° point angle improve performance when machining harder materials.

How should I use the MetavCUT Twist Drill Type N to maximise tool life?
For best results with the MetavCUT Twist Drill Type N, secure the workpiece, use correct spindle speed and feed for 8 mm HSS‑E, and apply cutting fluid when machining stainless or high‑temperature alloys to reduce wear and avoid overheating.

What is a Twist Drill used for?
A Twist Drill is mainly applied when machining high‑strength materials and larger diameters; this form is easy to regrind and withstands higher loads.

Which three drill types exist?
The three main drill categories are metal drills, wood drills and stone/concrete drills.

Why are twist drills point‑sharpened?
Point sharpening reduces the cross‑cut at the tip, significantly lowering friction so that reduced feed forces are sufficient; it also improves initial centring of the tip in the workpiece.

Can a metal drill be used to drill wood?
A metal drill can be used in wood, but guidance is poorer and the hole finish is less clean; however, metal drills are easier to resharpen and show less self‑feeding.

At which drilling depths is the twist drill most commonly used?
Solid drilling with a twist drill is standard for hole diameters up to about 20 mm and drilling depths up to roughly 100 mm; it is the most frequently used tool for these ranges.

Is HSS or HSSE better?
The common belief that HSSE is always superior to HSS is incorrect; you should assess whether working conditions justify the higher cost of HSSE for your specific application.