Drill Bit Set Tvardy HSS M2 conical 3 pcs (4–12, 4–20, 4–32 mm)

Tvardy conical drill bit set with three HSS M2 bits (4–12 mm, 4–20 mm, 4–32 mm) is designed for progressive stepped drilling and hole enlargement in metals and other materials compatible with high-speed steel tools. Each conical bit features a tapered cutting profile that allows successive increases in hole diameter without tool changes, enabling operations such as deburring, chamfering and creating stepped holes in a single pass. The set is intended for workshop, maintenance and fabrication tasks where controlled hole enlargement and clean edges are required.

Advantages

The HSS M2 material provides a balance of hardness and toughness suitable for drilling into mild and medium steels, non-ferrous metals and many alloys. The conical, step-style geometry delivers smooth diameter transitions and reduces the need for multiple tools, saving time during setup and operation. Compact three-piece packaging covers a broad range of hole sizes from 4 mm to 32 mm, offering flexibility for varied applications while occupying minimal storage space.

Suitable for

• Progressive hole enlargement and stepped hole creation in metalwork
• Deburring and chamfering of drilled holes
• Maintenance, repair and fabrication tasks in workshops
• Drilling in non-ferrous metals, sheet metal and thin-walled components

Key specifications

• Material: High-speed steel (HSS M2)
• Set contents: Three conical drill bits with working diameter ranges 4–12 mm, 4–20 mm, 4–32 mm
• Geometry: Tapered/stepped cutting profile for progressive diameters
• Intended use: Drilling, hole enlargement, deburring and chamfering
• Compatibility: Suitable for use in hand drills and drill presses with appropriate chuck capacity

How to use

Select the conical bit whose maximum working diameter matches or exceeds the target hole size, secure the bit in an appropriate drill chuck, and clamp the workpiece to prevent movement. Start drilling at low speed to establish the conical entry, then adjust speed and feed according to material hardness—higher speeds for softer metals, lower speeds for harder steels. Apply steady pressure and use cutting fluid when working with metals to reduce heat and prolong tool life. For stepped holes, start with the smallest-diameter end of the conical bit and feed until the required diameter is achieved.

Usage recommendations

Use cutting fluid for metalworking, avoid excessive axial force to reduce tool wear, and maintain correct drill speeds for the material. Inspect bits for wear or damage before use and replace if cutting performance declines. Store the set in a dry place to prevent corrosion and protect cutting edges when not in use.