Drill bit for metal GRAPHITE HSS cylindrical 10.2 mm, model 55H034

GRAPHITE HSS cylindrical drill bit, diameter 10.2 mm, model 55H034, is a cutting tool made from high-speed steel designed for drilling holes in steel and other metal materials. It is intended for use with hand drills and drill presses in metalworking tasks such as creating holes for fasteners, assembly, and maintenance. The cylindrical shank provides stable clamping in chucks and reduces runout during operation.

Advantages

The high-speed steel construction offers good wear resistance and heat tolerance for general metal drilling. Its cylindrical shank is compatible with standard drill chucks, enabling quick tool changes and reliable concentricity. The tool geometry is optimized for penetrating ferrous and non-ferrous metals, providing consistent hole quality and extended service life under appropriate cutting conditions.

Suitable for

• Drilling through steel, iron, and common non-ferrous metals
• Workshop assembly and maintenance tasks requiring 10.2 mm holes
• Use with hand drills and drill presses for general metalworking

When it may not be suitable

This HSS drill bit is not designed for masonry, concrete, ceramic, or glass; using it on such materials will result in rapid wear or breakage. For very hard alloys, hardened tool steels, or high-production industrial applications where carbide or coated carbide tools are standard, a high-speed steel bit may wear faster and require more frequent replacement.

Key specifications

• Material: high-speed steel (HSS)
• Tip style: standard twist drill geometry for metal
• Shank type: cylindrical
• Diameter: 10.2 mm
• Typical applications: drilling holes for fasteners, assembly, maintenance in metal

How to use

Secure the drill bit in a compatible chuck ensuring the shank is firmly clamped and concentric. Select an appropriate cutting speed and apply cutting fluid when drilling ferrous metals to reduce heat and extend tool life. Start at low speed to create a guiding indentation or use a centre punch to prevent wandering. Apply steady, even feed pressure and withdraw periodically to clear chips. After use, clean and store the bit in a dry place to avoid corrosion.

What to consider before purchase

• Confirm that a 10.2 mm hole size meets your application requirements
• Ensure your drill or press accepts a cylindrical shank and can provide appropriate speed and torque
• Consider material being drilled—HSS is suitable for general metals but may not be ideal for very hard alloys or masonry

Usage recommendations

Use cutting fluid for drilling steels, choose moderate speeds for larger diameters, and secure the workpiece to maintain hole accuracy and prolong bit life.