Drill bit Irwin 10502793 lip drill bit, 4 mm, 1 pc

Irwin 10502793 lip drill bit, 4 mm diameter, single piece. This lip-style drill bit is engineered for accurate hole making in general-purpose materials and is suitable for use with handheld and bench drills. The centre point ensures precise starts, while the fully hardened body increases wear resistance for consistent performance during maintenance, fabrication, and light industrial or workshop tasks where a compact 4 mm drill is required.

Advantages

The centre point reduces walking at start-up, enabling cleaner, more accurate drilling. A fully hardened drill body provides enhanced durability and longer tool life under regular use. The spurred cutting head minimises splintering and helps produce smooth, clean hole edges. Wide flutes promote efficient chip evacuation, reducing clogging and heat build-up during continuous drilling.

Suitable for

• Drilling precise 4 mm holes in wood and general-purpose materials
• Handheld drill operations and bench drilling
• Maintenance, light fabrication, and workshop tasks
• Situations requiring reduced splintering and clean hole edges

Key specifications

• Drill bit type: lip drill bit with centre point
• Diameter: 4 mm
• Overall length: 75 mm
• Shank type: cylindrical
• Cutting head: spurred design to reduce splintering
• Flute design: wide flutes for fast chip removal
• Hardening: fully hardened body for wear resistance
• Pack quantity: 1 piece

How to use

Install the 4 mm lip drill bit into the chuck of a handheld or bench drill and tighten securely. Position the centre point on the marked drilling location to ensure an accurate start. Begin drilling at a moderate speed to allow the centre point and spurred cutting head to engage cleanly, then adjust speed according to material and bit behaviour. Use steady pressure without forcing the bit; allow the wide flutes to clear chips regularly. Withdraw the bit occasionally on deeper holes to remove accumulated chips and prevent overheating.

Usage recommendations

For best results when drilling wood or general-purpose materials, use appropriate drill speeds (moderate to high depending on material density), keep the bit cool by reducing continuous run time, and clear chips frequently. Inspect the bit for wear before use and replace when cutting performance deteriorates. Use suitable personal protective equipment and clamp workpieces securely.