Drill bit Wolfcraft 7257000 HSS metal spiral drill 3 mm, overall length 47 mm, ground, DIN

Wolfcraft 7257000 is a high-speed steel (HSS) spiral drill bit for metal with a 3 mm cutting diameter and an overall length of 47 mm. The flutes and cutting lips are ground to DIN standards to provide precise chip evacuation and consistent hole geometry when working in steel and non‑ferrous metals. The ground spiral design helps centring and stable drilling performance in handheld drills and drill presses for general metalworking, maintenance and assembly tasks.

Advantages

The HSS material offers good hardness and heat resistance for drilling through a variety of metals while maintaining edge sharpness. Ground cutting edges and flutes manufactured to DIN tolerances ensure uniform cutting action and repeatable hole sizes. Its compact 47 mm overall length and 3 mm diameter make it suitable for confined spaces and for producing small-diameter holes with minimal wobble. The spiral geometry supports efficient chip removal, reducing clogging and improving drilling consistency.

Suitable for

• Drilling holes in mild and alloy steels
• Working with non‑ferrous metals such as aluminium, brass and copper
• Maintenance and repair tasks with handheld drills
• Drill press operations requiring small, precise holes
• Assembly work where compact, accurate holes are needed

Key specifications

• Material: high-speed steel (HSS)
• Cutting diameter: 3 mm
• Overall length: 47 mm
• Spiral (twist) drill geometry with ground flutes and cutting edges
• Designed to DIN grinding tolerances for improved accuracy

How to use

Select an appropriate rotational speed for the metal being drilled and secure the workpiece to prevent movement. Clamp the drill bit firmly in the chuck of a handheld drill or drill press. Apply steady, moderate pressure and keep the drill perpendicular to the surface to achieve a straight, clean hole. Use cutting fluid or oil when drilling tougher steels to reduce heat build‑up and extend tool life, and periodically withdraw the bit to clear chips from the flutes.

Usage recommendations

For best results, start with a pilot hole when drilling very hard materials, and maintain proper coolant and feed rates. Store the drill bit in a dry, protected holder to avoid damage to the ground cutting edges.