Drill bit set Proedge 12.5 mm HSS-G TiN for metal, 5 pcs

Set of five Proedge HSS‑G TiN drill bits, each 12.5 mm in diameter, designed for drilling metal. These high-speed steel (HSS‑G) bits feature a titanium nitride (TiN) coating that improves surface hardness and wear resistance. The set is suitable for use with hand drills and drill presses for creating through-holes and clearance holes in steel, cast iron and non‑ferrous metals. The 12.5 mm size is commonly used for bolt clearance holes and general metal fabrication tasks.

Advantages

The TiN coating extends tool life by reducing friction and improving heat resistance during drilling. HSS‑G construction provides toughness for metalworking applications while maintaining edge retention. The set of five identical bits ensures consistent hole sizes across multiple operations and replacements. Designed for standard drilling machines and handheld drills, the bits offer stable performance when used with appropriate speeds and cutting fluids.

Suitable for

• Drilling through-holes and clearance holes in steel and iron
• Creating holes in non‑ferrous metals such as aluminium and copper
• General metal fabrication and maintenance work
• Use with hand drills and drill presses

Key specifications

• Diameter: 12.5 mm
• Material: High-speed steel (HSS‑G)
• Coating: Titanium nitride (TiN) for increased hardness and reduced friction
• Quantity: 5 pieces
• Intended materials: Steel, cast iron, aluminium and other non‑ferrous metals

How to use

Secure the workpiece to prevent movement and select the appropriate drill speed for the material being cut — lower speeds for harder steels and higher speeds for softer non‑ferrous metals. Mark the drilling point and start with a center punch if needed to prevent wandering. Mount the 12.5 mm Proedge bit in the drill chuck and tighten securely. Apply steady, moderate pressure and maintain coolant or cutting fluid flow when drilling thicker or harder metals to reduce heat buildup and prolong bit life. Withdraw periodically to clear chips and inspect the cutting edges.

Usage recommendations

For best results, use cutting fluid when drilling steel or cast iron, and adjust speed according to material hardness. Replace bits when wear or edge damage is visible to maintain hole accuracy and surface finish.