Metal drill bit set Abraboro HSS cylindrical 5.1 mm — 10 pcs (AB00010511)

Set of 10 Abraboro HSS cylindrical drill bits with a nominal diameter of 5.1 mm, designed for drilling metal in manual and machine applications. Manufactured from high-speed steel (HSS), these drill bits are intended to produce precise 5.1 mm holes in steel and various other metals. The cylindrical shank fits standard chucks, making the set compatible with handheld drills, drill presses and production machines used in metalworking, maintenance and repair tasks.

Advantages

The Abraboro HSS construction provides a balance of hardness and toughness required for general-purpose metal drilling. A consistent 5.1 mm nominal diameter across all 10 pieces ensures repeatable hole sizes for assembly or repair work. Cylindrical shanks allow secure clamping in standard chucks without the need for adapters. The set format supplies multiple replacement bits for continuous operation and reduces downtime due to worn or broken cutters.

Suitable for

• Drilling holes in mild and alloy steels
• General metal fabrication and workshop use
• Maintenance, repair and assembly tasks requiring 5.1 mm holes
• Handheld electric drills and drill presses with standard chucks

Key specifications

• Quantity: 10 pieces
• Material: High-speed steel (HSS)
• Nominal diameter: 5.1 mm
• Shank type: Cylindrical (straight) shank for standard chucks
• Intended material: Steel and other metals

How to use

Select an appropriately sized pilot or center mark and secure the workpiece to prevent movement. Fit the cylindrical shank of the 5.1 mm Abraboro HSS drill bit into a properly tightened standard chuck. Use suitable cutting oil or lubricant when drilling steel to extend tool life and improve chip evacuation. Start at low speed to establish the hole, then apply steady feed and moderate speed appropriate for HSS into metal. Retract periodically on deeper holes to clear chips and reduce heat buildup. Replace bits from the set as they become dull or damaged.

Usage recommendations

For best results when drilling steel, use cutting fluid, clamp the workpiece firmly, and match drill speed to material hardness — lower speeds for harder steels. Inspect drill bits periodically for wear and replace worn bits to maintain hole accuracy and prevent workpiece damage.