Drilling with a cordless screwdriver or a drill is not possible without a twist drill. For this reason, twist drills must not be missing in any toolbox, so that you can also make all the necessary holes.
Find out which twist drill is suitable for which material and much more in our checklist. You will find a wide selection of twist drills in our product recommendations.
- Twist drills are divided into three types. In Germany, the DIN 338 standard (formerly DIN 1414-1/2) specifies what these types must be.
- Type N stands for the so-called normal spiral . It is suitable for normal materials such as steel.
- Type H designates a long spiral. You can use this type for hard, tough and brittle materials, for example for high-strength steel, magnesium, rocks and plastics.
- Type W denotes a narrow spiral. It is suitable for soft and tough materials such as copper, zinc and aluminum.
- Twist drills are made of hardened high speed steel (HSS), known in English as High Speed Steel. They are sufficient for most drilling work in the household.
- If you want to drill into particularly hard materials such as alloy steel or stainless steel, use a twist drill with cobalt alloy.
- Drill bits coated with titanium nitrideare also suitable for hard materials. You can recognize them by their golden color.
- Twist drills are available in different grinding forms.
- The standard is the cone shell grinding. Twist drills with a conical surface grind are insensitive to high mechanical loads, but the centering is comparatively poor.
- The taper-jacket grinding with sharpened cross cutting edge and corrected main cutting edge is suitable for tough and high-strength materials.
- In cross grinding, the tip is cross-shaped. Forged workpieces can be machined with this type of grinding.
- A twist drill with a center point is used for soft materials and thin workpieces.
- For work with gray cast iron there is a special grinding form.
- Twist drills are usually available as sets with drill diameters between 1 mm and 13 mm.
- Most sets are compatible with all common hand drills and drill shank stands with round shank drill holders. Before buying, however, pay close attention to the manufacturer’s specifications to ensure that the drill bits fit your drill.
Table of contents
Recommended Twist Drills
We have compiled the best and most interesting twist drills. You can find the list with our product recommendations here.
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The Best Sellers Of Twist Drills
In a list of bestsellers we have compiled the most popular twist drills for you.
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Current offers of twist drills
You can find the best current offers on twist drills in this list.
FAQ About Twist Drills
A “High Speed Steel” (HSS) drill bit enables significantly higher drilling speeds, as it can withstand temperatures of up to 600°C.
A twist drill is a drill that usually consists of two cutting edges and a tapered head. The head is sharpened to make pinpoint holes
A twist drill maintains a constant diameter even when re-sharpened. Furthermore, pointed drills have a favorable drilling angle, which is advantageous for further processing of the workpieces.
Twist drills are often used to drill holes for screws or other elongated fasteners. In addition to metal, wood panels are also frequently drilled with a twist drill.
Coated twist drills basically have a much longer life than uncoated twist drills because they are much more resistant to corrosion. For this reason, a coated twist drill is more expensive than an uncoated twist drill.
Twist drills are sharpened to reduce the feed force and improve chip flow.
The mostly double flute enables precise penetration into the material and prevents the twist drill from starting in the wrong place.
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