Drill bit Abraboro HSS cylindrical 4.2 mm, set 10 pcs (AB44004200)

Abraboro HSS cylindrical 4.2 mm drill bits, set of 10 pieces, are designed for drilling precise 4.2 mm holes in a range of materials, primarily metals and general-purpose workpieces. Manufactured from high-speed steel (HSS), these bits provide durability and good wear resistance for routine metalworking, workshop maintenance and repair tasks. The cylindrical shank fits standard chucks on hand drills and drill presses with matching capacity, offering straightforward installation and stable performance during drilling operations.

Advantages

The high-speed steel construction ensures heat resistance and sustained cutting performance when drilling into metal and alloy materials. A consistent 4.2 mm diameter across the set enables repeatable hole sizes for assembly or repair work. The cylindrical shank is compatible with common drill chucks, allowing use in handheld drills and bench or pillar drills. Supplied as a pack of 10, the set reduces downtime by providing spare bits for frequent use and replacement.

Suitable for

• Drilling holes in steel, iron and non-ferrous metals
• General workshop and maintenance drilling tasks
• Preparing holes for small fasteners, rivets or pins
• Use in hand drills and drill presses with compatible chucks

Key specifications

• Material: High-speed steel (HSS)
• Cutting diameter: 4.2 mm
• Shank type: Cylindrical shank for standard chucks
• Quantity in set: 10 pieces
• Primary application: Metalworking and general-purpose drilling

How to use

Select the appropriate drill speed for the material being worked—lower speeds for harder metals and higher speeds for softer metals or non-ferrous materials. Secure the workpiece and fit a single 4.2 mm bit firmly into the chuck, ensuring proper alignment. Apply steady, moderate pressure and allow the HSS bit to cut without forcing; withdraw periodically to clear chips and reduce heat buildup. Use cutting fluid or lubricant when drilling steel or other hard metals to improve bit life and hole quality. Replace bits from the set as they become worn.

Usage recommendations

Store the drill bits in a dry location to prevent corrosion and keep them organized by diameter. For prolonged bit life when drilling metal, use appropriate cutting fluid, moderate feed rates, and correct rotational speeds recommended for HSS tooling.