Drill bit set Top Tools HSS cylindrical 3 mm, 10 pcs (60H430)

Top Tools HSS cylindrical 3 mm drill bit set (10 pcs) is a collection of small-diameter high-speed steel drills designed for precise metalworking tasks. Each bit features a 3 mm cutting diameter and a cylindrical shank compatible with standard drill chucks. The set is intended for drilling through a range of metals and metal alloys where fine, accurate holes are required, suitable for workshop, maintenance, and light industrial use.

Advantages

The HSS material offers good hardness and heat resistance for cutting metal at moderate speeds, extending service life compared with carbon-steel bits. The uniform 3 mm diameter across all ten pieces ensures consistent hole size when multiple drills are needed, while the cylindrical shank provides reliable fit in common chuck types. The compact set format keeps replacement bits on hand and reduces downtime during repetitive drilling tasks.

Suitable for

• Drilling small-diameter holes in steel and non-ferrous metals
• Precision tasks in workshops and maintenance departments
• Model making, instrument repair and metal fabrication requiring fine holes
• Light industrial production runs where consistent 3 mm holes are needed

Key specifications

• Drill material: High-speed steel (HSS)
• Cutting diameter: 3 mm
• Shank type: Cylindrical shank for standard chucks
• Quantity: 10 pieces per set
• Intended use: Metal and metal alloy drilling

How to use

Secure the appropriate drill bit in the drill chuck, ensuring the shank is fully inserted and the chuck is tightened. Use appropriate cutting speeds and feed rates for 3 mm HSS drills to avoid overheating; apply cutting fluid when drilling harder metals to improve chip evacuation and extend tool life. Center punching the workpiece before drilling helps maintain bit position and accuracy. After use, clean chips from the flutes and store the bits in their case to prevent damage.

Usage recommendations

For best results, match drill speed to the workpiece material and use light, steady pressure. Use cutting fluid when drilling stainless steel or other hard alloys, and replace worn bits to maintain hole quality and prevent workpiece damage.