HSS drill bits for metal drilling

The right category depends on the type of metal and your use. Choose HSS drill bits made for metal drilling, and match the diameter and length to your tool and the job you’re doing. In this selection, you’ll find sets ranging from 5 to 19 pieces for working with metal. For example, a Bosch HSS PointTeQ 19-piece set covers diameters from 1 mm to 10 mm for standard drilling in metal—ideal for a range of tasks. Some sets use a reduced shank to fit three-jaw chucks, with sizes from 15 to 20 mm depending on your needs. You’ll also see twist or spiral variations for different handling styles and better chip flow.

The most complex is the combination of diameter-length and shank type, because it determines compatibility and performance in your tool. A reduced shank, for example, lets you use longer bits in three-jaw chucks while keeping the same strength and stable performance for deep drilling. You’ll find shank sizes like 15, 16, 17, 18, and 20 mm, and standards such as DIN 338 that help ensure consistent geometry and interchangeability between sets. Choosing between twist and spiral also depends on how you manage chips and the drilling speed.

For occasional DIY users, a smaller set—like 7 or 12 pieces—can cover drilling needs for common metals without carrying too many tools. However, a professional or frequent user benefits from a larger assortment—for example, a Bosch set (or equivalent) covering 1 to 10 mm, with a reduced shank and an optional spiral style to suit different chucks and projects. This variety makes it possible to work on thin materials like thin steel and drill deeper holes, using HSS bits matched to metal.

To extend the life of HSS drill bits, use cutting lubricant when drilling metal and avoid overheating. Remove chips often to prevent clogging. Check for wear and replace bits when you notice dulling or excessive burrs. Store sets in their original case or on a dedicated holder to prevent impacts and corrosion. Make sure the bit diameter and shank type match the chuck on your tool to avoid slipping.

Focus on the working diameter (for example, 1–10 mm in a 19-piece set), cutting length and total length (like 125 mm and 184 mm for certain bits), the bit type (twist or spiral), the material (HSS), and the shank type (15–20 mm size). Also check whether the set mentions standards like DIN 338 for consistent geometry and interchangeability, and look for reduced-shank bits designed for three-jaw chucks—so you can optimize your choice based on your tool.

DIN 338 indicates the geometry standard for HSS drill bits, ensuring consistent precision and interchangeability between different sets. A reduced shank allows you to use longer bits in three-jaw chucks while maintaining the required strength. This helps you adapt the equipment to your specific tool and needs—such as drilling depth or working with thicker materials without sacrificing stability.