Spade drill bit Irwin 10502811 18 mm diameter

Irwin 10502811 spade drill bit, 18 mm diameter, is designed for efficient drilling in wood and wood-like materials. The bit features double cutting spurs that scribe the outside of the hole to reduce breakout and a thicker cutting edge for extended life. The BLUE-GROOVE point and cutting edge promote faster chip removal, while the enlarged shank and 1/4" quick-change fitting provide improved durability and compatibility with standard quick-change chucks. This spade bit is intended for creating clean, wide holes with conventional drills in a range of on-site and workshop tasks.

Advantages

The double cutting spurs minimize tear-out at the hole perimeter, producing a cleaner finish on workpieces. The reinforced cutting edge increases resistance to wear, extending usable life under typical carpentry conditions. The BLUE-GROOVE point improves chip evacuation for faster drilling and reduced clogging. A slightly larger shank adds strength and reduces flex, and the 1/4" quick-change shank enables rapid swapping in compatible drill systems.

Suitable for

• Drilling through solid wood, plywood and chipboard
• Carpentry and rough framing tasks
• Electrical and plumbing installations where larger clearance holes are required
• Quick-change drilling with compatible 1/4" chucks

Key specifications

• Diameter: 18 mm
• Tip design: spade with BLUE-GROOVE point for chip removal
• Cutting features: double spurs and thicker cutting edge
• Shank type: 1/4" quick-change shank
• Material application: wood and wood-based materials

How to use

Secure the spade bit in a compatible drill chuck or quick-change holder, ensuring the 1/4" shank is fully seated. Mark the drilling position on the workpiece and begin drilling at low speed to engage the spade point, then increase speed as the bit tracks. Apply steady, moderate pressure to allow chips to evacuate through the BLUE-GROOVE channel; withdraw occasionally on deep holes to clear chips. Maintain alignment to prevent wanding and ensure a clean hole edge created by the cutting spurs.

Usage recommendations

Use appropriate personal protective equipment, clamp the workpiece securely, and select drill speeds suitable for the wood type. For longer life and cleaner holes, keep the cutting edge sharp and remove pitch or resin build-up. Avoid excessive side-loading to prevent bit bending or premature wear.