DeWALT DT4818-QZ drill bit Spade drill bit

The DeWALT DT4818-QZ spade drill bit is a single-piece chrome vanadium flat bit designed for fast, direct drilling of larger-diameter holes in wood and similar materials. It features a ground central point and sharpened cutting edges for accurate location and controlled entry, while an integrated ground chip breaker reduces splintering and helps produce cleaner holes with improved drilling efficiency. Supplied as one piece per pack, this spade bit is intended for use with standard handheld drills and drill drivers compatible with flat-shank bits.

Advantages

This spade drill bit combines a hardened chrome vanadium construction with precision-ground features to provide reliable durability and consistent performance. The central point ensures accurate positioning without excessive wanders, and the cutting edges produce a clean profile at the hole perimeter. The chip breaker reduces tear-out on the exit face, improving hole finish and reducing the need for secondary cleaning. The single-piece design simplifies mounting and reduces the chance of bit failure under typical wood drilling loads.

Suitable for

• Drilling larger through-holes in softwood, hardwood and plywood
• Quick structural or rough carpentry tasks where fast material removal is required
• Making holes for wiring, conduit or pipe installation in wooden substrates
• General-purpose workshop drilling with handheld drills and drill drivers

Key specifications

• Construction material: chrome vanadium steel for wear resistance and toughness
• Tip design: ground central point for accurate location and reduced walking
• Cutting edges: sharpened flat blade edges for direct material removal
• Chip control: ground chip breaker to minimise splintering and improve hole finish
• Shank type: flat spade-style shank suitable for standard drill chucks
• Pack quantity: 1 piece per pack

How to use

Mark the drilling position and secure the workpiece to prevent movement. Fit the spade bit into the drill chuck and tighten firmly. Start drilling at low speed to allow the ground central point to locate accurately, then increase speed and apply steady pressure for efficient chip removal. Reduce feed rate as the bit nears the exit face to minimise splintering. Clear chips from the hole periodically to maintain cutting efficiency and prevent overheating.

Usage recommendations

Use appropriate personal protective equipment, including eye protection and hearing protection. Select drill speeds and feed pressure suitable for the material and hole diameter; excessive speed or pressure can cause premature wear. For cleaner exit holes in veneered or laminated boards, consider backing the workpiece. Inspect the bit before use and replace it if cutting edges are worn or damaged.