Spade drill bit Irwin 10502813, 20 mm diameter, for wood

The Irwin 10502813 spade drill bit, 20 mm diameter, is designed for efficient drilling in wood and wood-based materials. This flat paddle-style bit fits standard drills and quick-change chucks, delivering fast material removal and producing clean, wide holes suitable for dowels, cable runs or conduit passages. The bit combines a reinforced cutting edge with chip evacuation features to maintain drilling speed and hole quality over repeated use.

Advantages

Double cutting spurs scribe the outside of the hole to reduce breakout and leave a neater entry surface. A thicker cutting edge extends service life under typical woodworking conditions. The BLUE-GROOVE point and cutting edge promote faster chip removal and help prevent clogging. A slightly larger shank and hex quick-change design increase durability and simplify bit changes in cordless and corded drills.

Suitable for

• Drilling clean holes for dowels and wooden plugs
• Creating passages for electrical cables and conduits in timber
• Rough carpentry and joinery where wide holes are required
• DIY projects involving soft and medium-density wood

Key specifications

• Type: spade (paddle) drill bit
• Diameter: 20 mm
• Total length: 157 mm
• Intended materials: wood and wood-based materials
• Shank type: 1/4" hex quick-change

How to use

Secure the spade bit in a compatible drill or quick-change chuck, ensuring the shank is fully seated. Mark the drilling position and start at low speed to establish the center, then increase speed while maintaining steady, even pressure. Withdraw the bit periodically to clear chips when drilling deep holes. For best results, support the workpiece to prevent tear-out on the backside and use backing boards where necessary.

Usage recommendations

Use cutting speeds and feed pressure appropriate for the wood species; reduce speed for hard or dense timbers. Keep the cutting edge sharp and inspect the bit for wear before use. When drilling through finished surfaces, clamp a backing board to reduce splintering. Wear appropriate eye and hearing protection while drilling.