Twist drill bit Irwin 4.5 mm, single piece (model 10502215)

Irwin twist drill bit with a 4.5 mm diameter, single piece. The bit features standard twist geometry for efficient chip evacuation and accurate, straight drilling. It is intended for general-purpose use in a variety of common materials and is compatible with both hand drills and drill presses. The 4.5 mm size provides a precise hole for fastening, doweling, or pilot drilling tasks.

Advantages

This twist drill bit delivers consistent hole quality thanks to its conventional flute design that promotes reliable chip removal and reduced walking at the point of contact. Its cylindrical shank ensures secure clamping in standard chucks and drill press holders. The bit is versatile across metal, wood and plastic and also performs well in sheet metal. When used with appropriate speeds and feeds it gives repeatable results for everyday workshop and site tasks.

Suitable for

• Drilling holes in mild steel and general metalwork
• Creating pilot holes in wood for screws and dowels
• Drilling plastics and composite panels
• Working with sheet metal where a 4.5 mm hole is required

Key specifications

• Drill type: twist drill
• Diameter: 4.5 mm
• Overall length: 80 mm
• Shank type: cylindrical
• Package quantity: 1 piece
• Compatible with hand drills and drill presses

How to use

Secure the drill bit in the chuck or holder ensuring the cylindrical shank is fully seated and tightened. Select a drilling speed appropriate for the material—higher speeds for wood and plastics, moderate speeds for mild steel and sheet metal. Start drilling with light pressure to establish the hole and then apply steady feed force while allowing the bit to clear chips. Withdraw periodically for chip removal in deep holes and keep the workpiece clamped to avoid movement.

Usage recommendations

For drilling stainless steel, use cutting fluid or coolant to reduce heat and prolong tool life; for general metalworking, moderate speeds and steady feed improve hole quality. If working extensively with stainless or hardened materials, consider using specialty cobalt or high-speed steel variants designed for those conditions.