Drill bit Art-Pol AR52070 — cobalt straight shank 7 mm for metal

Art-Pol AR52070 is a 7 mm cobalt drill bit designed for demanding metal drilling tasks. The solid construction and cobalt alloy tip provide increased hardness and heat resistance compared with standard high-speed steel bits, making this 7 mm bit suitable for drilling stainless steel, alloyed steels and other ferrous materials. The straight (cylindrical) shank fits common keyed and keyless chucks, allowing use in hand-held drills and drill presses for workshop, construction and repair work.

Advantages

This cobalt straight-shank 7 mm drill bit offers improved wear resistance and sustained cutting performance at elevated temperatures. The precisely ground tip reduces walking at start-up and helps maintain hole accuracy. The straight shank simplifies mounting in standard chucks while ensuring secure grip during operation. Overall, the design balances toughness for hard metals with the dimensional stability needed for repeatable drilling results.

Suitable for

• Drilling holes in stainless steel and alloyed steels
• Metalworking in workshops and on construction sites
• Repair and maintenance of machinery and metal components
• Use with hand drills and drill presses

Key specifications

• Material of cut: cobalt alloy tip for high hardness and heat resistance
• Diameter: 7 mm
• Shank type: straight (cylindrical) shank for standard chucks
• Primary use: drilling ferrous metals including stainless and alloy steels
• Suitable machines: hand-held electric drills and bench drill presses

How to use

Select appropriate cutting speed and feed for the metal being machined and secure the workpiece to prevent movement. Mount the straight shank firmly in the drill chuck and check concentricity before starting. Use cutting fluid or coolant when drilling hard or stainless steels to reduce heat build-up and extend tool life. Apply steady pressure; avoid excessive force that can cause bit breakage or overheating. Retract periodically to clear chips when drilling deep holes.

Usage recommendations

For best results when drilling stainless or alloyed steels, use a moderate spindle speed, adequate cutting fluid, and firm clamping of the workpiece. Replace the bit if excessive wear or chipping appears, and inspect the drill tip periodically to maintain hole quality and safe operation.