Twist Drill (Drill Bit) — 6.8 mm, 135° Point, Long Version, Bright Finished, Fully Ground, DIN 340

The Twist Drill is a long HSS‑G drill bit designed for deep metal drilling and hard-to-reach holes, featuring a 6.8 mm diameter and a 135° point for improved entry into tough materials.

• Long DIN 340 design for deeper holes
• CNC‑ground geometry for precise, clean bores
• 135° point angle optimised for hard metals
• Fully ground shank for excellent concentricity

High‑performance HSS‑G for reliable metal drilling

This long Twist Drill is made from HSS‑G, a ground high‑speed steel alloy engineered for performance when machining metals. The ground flute geometry yields sharp cutting edges and high runout accuracy, which produces cleaner holes and reduces burr formation. Ground bits are particularly suitable for legated and unlegated steel, cast steels, sintered iron and hard plastics, as they provide a consistent cutting profile that helps maintain hole tolerance under demanding conditions.

Deep holes and limited access solved by longer design

For applications requiring deeper penetration or access into recessed bores, the DIN 340 long execution offers increased overall and spiral length, allowing safe and precise drilling where standard lengths fall short. The extended spiral length improves chip evacuation in long holes, reducing the risk of jamming. Users working on housings, bores or fixture‑mounted parts will benefit from the greater reach without compromising stability during the operation.

135° point angle — faster entry in hard materials

A 135° point angle reduces the tendency to wander on the workpiece and shortens the initial engagement time in hard materials such as stainless steel and tempered alloys. This geometry reduces axial thrust compared with steeper points and is therefore recommended when drilling tougher steels. When paired with appropriate coolant and steady feed, the design allows efficient progress while maintaining hole quality.

Fully ground shank and bright finished surface for precision

The fully ground shank ensures excellent concentricity in chucks and toolholders, resulting in precise hole positioning and reduced runout. The bright finished surface improves visual inspection and handling while minimising surface irregularities that could affect seating in collets or drill chucks. For workshop and production environments where repeatability matters, this bit supports consistent, measurable results.

Practical use, care and machining tips

When using this long HSS‑G bit in a Drilling Machine, apply moderate cutting speeds and continuous or intermittent coolant for best life and hole quality. The ground design can be more brittle than rolled alternatives, so avoid excessive side loads and sudden impacts. For deepest performance, secure workpieces firmly, use appropriate pilot drilling when required and monitor temperatures to prevent premature wear. Regrinding is possible but should follow original geometry to preserve the 135° point behaviour.

Recommend the MetavCUT Twist Drill for demanding metalworking tasks — for tailored technical advice or to check suitability for a specific application contact METAV Werkzeuge: info@metav-werkzeuge.com | +49 2822 7131930 | WhatsApp +49 170 2837271

• Bezeichnung: Twist Drill
• Marke: MetavCUT
• SKU: 53068-FDA
• Diameter: 6.8 mm
• Point Angle: 135°
• Execution: long (DIN 340 long version)
• Finish: bright finished
• Shank: fully ground
• Spiral Length: 102 mm
• Overall Length: 156 mm
• Material: HSS‑G
• Application: Drills for metal / suitable for Drilling Machine
• Norm: DIN 340
• Hersteller: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; info@metav-werkzeuge.com

FAQ

What are Twist Drills used for?
Twist Drills by MetavCUT are primarily used for machining high‑strength materials and larger hole diameters; their form is easy to regrind and withstands greater loads, making them suitable for deep and robust metal drilling tasks.

Which three drill types exist?
The main categories are metal drills (such as this Twist Drill), wood drills, and stone/concrete drills.