Drill Bit GRAPHITE HSS Straight Shank 12.5 mm for Metal (55H039)

GRAPHITE HSS Straight Shank drill bit with a 12.5 mm cutting diameter is designed for drilling through steel and other ferrous and non‑ferrous metals. Manufactured from high‑speed steel (HSS), the bit delivers the hardness and heat resistance required for metalworking tasks. The cylindrical straight shank fits standard chucks on hand drills and drill presses, making it suitable for workshop maintenance, metal fabrication and precise through‑hole drilling.

Advantages

The HSS material provides a balance of toughness and temperature resistance for consistent cutting performance when drilling metals. The straight/cylindrical shank ensures secure clamping in chucks and simple compatibility with a wide range of drilling machines. The 12.5 mm diameter enables creation of medium‑sized through holes with good concentricity and dimensional stability for mechanical assembly and fittings.

Suitable for

• Drilling through steel, stainless steel, aluminium and other metals
• Use in hand drills and drill presses with compatible chucks
• Metal fabrication, maintenance and mechanical workshop tasks
• Creating precise through‑holes for bolts, pins and fasteners

Key specifications

• Cutting diameter: 12.5 mm
• Material: High‑speed steel (HSS)
• Shank type: Straight / cylindrical
• Application: Drilling in ferrous and non‑ferrous metals
• Recommended mounting: Compatible with standard drill chucks

How to use

Secure the drill bit in the drill chuck, making sure the shank is fully inserted and clamped tightly to prevent slipping. Select an appropriate rotational speed for the metal being drilled—lower speeds for harder steels and higher speeds for softer non‑ferrous metals—and use steady, moderate feed pressure. Apply cutting fluid or suitable coolant when drilling steel or stainless steel to reduce heat and extend tool life. After through‑drilling, back the bit out while the spindle is running at low speed to clear chips and prevent binding.

Usage recommendations

Use personal protective equipment (safety glasses and gloves) when machining metal. Inspect the bit for wear or damage before use and replace if cutting edges are dulled or chips form irregularly. Store the drill bit in a dry place to prevent corrosion and maintain cutting performance.