Drill bit set Abraboro HSS cylindrical 3.1 mm, 10 pcs (AB00010311)

Abraboro HSS cylindrical drill bit set, 3.1 mm diameter, 10 pieces, is a designed-for-metal solution for general drilling tasks. The bits are made of high-speed steel (HSS) and have a straight cylindrical shank that fits standard drill chucks. This set is intended for drilling through various metals and metal alloys in both handheld drills and drill presses, providing consistent hole quality for repair, fabrication, and workshop tasks.

Advantages

The high-speed steel composition offers good hardness and heat resistance for cutting metal at moderate speeds. Cylindrical shanks ensure secure clamping in standard chucks without requiring adapters. A uniform 3.1 mm diameter across the set simplifies task planning when that hole size is required repeatedly. The pack of 10 provides spare bits for frequent use or for multiple operators.

Suitable for

• Drilling holes in mild steel, stainless steel, and common metal alloys
• General metal fabrication and repair work
• Workshop and maintenance operations with hand drills and drill presses
• Small production runs and repetitive hole-making tasks

Key specifications

• Material: High-speed steel (HSS)
• Tip type: Standard twist drill geometry for metal
• Shank: Cylindrical (straight) shank for standard chucks
• Diameter: 3.1 mm
• Quantity: 10 pieces per set
• Typical applications: Drilling through metals and alloys

How to use

Secure the chosen 3.1 mm HSS drill bit in the drill chuck and tighten it firmly. Select an appropriate spindle speed for the material being drilled—lower speeds for hardened or stainless steels, higher speeds for softer metals. Use cutting fluid or coolant when drilling metals to reduce heat buildup and extend tool life. Apply steady, moderate feed pressure; avoid excessive force that can cause bit breakage or overheating. Retract the bit periodically to clear chips when drilling deep holes.

Usage recommendations

For best results, start with a center punch to prevent walking, use a corrosion-resistant cutting fluid for stainless steels, and replace worn bits to maintain hole accuracy. Store the set in a dry place to prevent corrosion and inspect bits for wear or damage before use.