Drill bit Irwin 10506625 lip drill bit, diameter 2.8 cm, 1 pc

Irwin 10506625 lip drill bit, diameter 2.8 cm, single piece, is designed for drilling clean, large-diameter holes in wood. The lip-style geometry with cutting spurs and a full screw tip helps start and pull the bit through the material while minimizing breakout on the exit side. A tapered flute and tri-flute design ensure faster chip ejection and reduced binding during drilling. The bit is supplied as one unit with a total length of 165 mm and heat-treated along its full length for improved durability.

Advantages

The cutting spurs produce cleaner hole edges and reduce splintering, while the full screw tip makes initial positioning and pull-through easier when drilling by hand or with a powered drill. Tapered flutes and the tri-flute profile accelerate chip removal, decreasing the risk of clogging and improving drilling speed. Full-length heat treatment increases wear resistance and extends tool life during repeated use.

Suitable for

• Drilling large clean holes in soft and hardwoods
• Cabinetmaking and joinery tasks requiring precise hole edges
• Repair and renovation work where minimal breakout is required
• Hobby and carpentry projects using hand or machine drills

Key specifications

• Type: lip drill bit with cutting spurs
• Diameter: 2.8 cm
• Overall length: 165 mm
• Flute design: tapered tri-flute for chip ejection
• Tip: full screw tip for pull-through and easy start
• Finish: full-length heat treatment for durability
• Pack quantity: 1 piece
• Typical use material: wood (soft and hardwood)

How to use

Secure the Irwin lip drill bit in a compatible chuck, ensuring proper alignment and firm clamping. Mark the drilling location and, if possible, use a center punch or pilot indent to prevent walking. Start drilling at low speed to engage the full screw tip, then increase speed as the bit cuts. Apply steady, even pressure without forcing; allow the tapered flutes to remove chips. For through-holes, support the workpiece or use backing material to reduce exit splintering.

Usage recommendations

Use appropriate drill speeds for the wood species and bit diameter; lower speeds are recommended for large diameters to avoid overheating. Clear chips regularly and inspect the bit for wear; re-sharpen or replace the bit when cutting efficiency decreases. Wear eye and hearing protection when operating power tools and clamp workpieces securely.