Drill bit for metal Smart HSS cylindrical 4.2 mm set of 10 (mpn 11-042)

Drill bit for metal Smart HSS cylindrical 4.2 mm set of 10 are high-speed steel (HSS) twist drill bits designed for drilling holes in ferrous and non-ferrous metals. Each bit has a 4.2 mm diameter and a standard cylindrical shank that fits common drill chucks. Supplied as a set of ten, these bits are intended for workshop, maintenance, prototype work and general metal fabrication where a reliable HSS cutting edge and conventional shank compatibility are required.

Advantages

The HSS material provides good hardness and heat resistance for cutting metal at medium speeds, maintaining sharpness during repeated use. The cylindrical shank ensures compatibility with a wide range of handheld and bench drills without the need for special adapters. Supplied in a set of ten, the package reduces downtime by providing immediate replacements and supports consistent hole quality across multiple operations.

Suitable for

• Drilling holes in mild steel, stainless steel, aluminium and other non-ferrous metals
• Workshop repair and maintenance tasks
• Prototype and small-batch metal fabrication
• General-purpose drilling with handheld and bench drills

Key specifications

• Material: high-speed steel (HSS)
• Diameter: 4.2 mm
• Shank type: cylindrical (straight) shank compatible with standard chucks
• Type: twist drill bit for metal
• Quantity: set of 10 pieces

How to use

Select a drill with a compatible chuck and secure the cylindrical shank of the 4.2 mm HSS bit tightly in the chuck. Mark and clamp the workpiece to prevent movement, and use cutting fluid or coolant when drilling harder metals to reduce heat and extend bit life. Start at a low speed to establish the hole, then increase speed as appropriate for the material. Apply steady, moderate pressure and periodically clear chips from the hole to maintain cutting efficiency.

Usage recommendations

For best results, use appropriate drill speeds for the material being drilled and apply cutting fluid when working with stainless steel or other hard alloys. Replace bits when they show signs of wear, chipping, or excessive vibration to maintain hole quality and prevent damage to the workpiece or drill.