Drill bit Smart365 HSS 4.1 mm, set of 10 — metal drilling

Smart365 HSS drill bits, 4.1 mm diameter, set of 10 are high-speed steel bits designed for metal drilling in manual or powered drills. The set provides a consistent 4.1 mm hole size for use on steel and other ferrous or non-ferrous metals. Packaged as a multi-pack, the set is intended for repeated use in workshops, construction sites and repair tasks where accuracy and uniform hole diameter are required.

Advantages

Manufactured from high-speed steel, these drill bits retain hardness at elevated temperatures and offer reliable wear resistance during metal cutting. The uniform 4.1 mm diameter across the set ensures consistent hole dimensions, while the multi-pack format reduces downtime by providing immediate replacements. The geometry of the tips is suitable for standard through-holes and pilot drilling in a variety of metal substrates.

Suitable for

• Drilling holes in steel plates and structural metal
• Creating pilot holes for tapping or fastener installation
• Repair and maintenance tasks in workshops and construction
• Use with handheld drills and drill presses

Key specifications

• Material: high-speed steel (HSS)
• Diameter: 4.1 mm
• Quantity: 10 pieces per set
• Intended material: ferrous and non-ferrous metals
• Shank type: straight round shank suitable for standard chucks

How to use

Select the appropriate drill speed for the metal being worked and secure the workpiece to prevent movement. Fit a 4.1 mm HSS bit into the drill chuck and tighten firmly. Apply steady pressure and run the drill at recommended speeds for HSS bits to avoid overheating; use cutting fluid or lubricant when drilling tougher or thicker metals. Withdraw the bit periodically to clear chips and reduce heat buildup. After use, clean chips from the flutes and store the bits in their pack to protect the cutting edges.

Usage recommendations

For best results, start with a center punch to prevent walking, use a lubricant appropriate for the metal type, and moderate drill speeds to extend bit life. Replace worn bits to maintain hole accuracy and avoid excessive force that could cause bit breakage.