Spade drill bit Irwin 10502823 — spade bit Ø 4 cm for wood

Irwin 10502823 is a spade drill bit with a 4 cm diameter designed for creating large through-holes and rough bores in wood and similar soft materials. The flat-profile blade and reinforced cutting geometry provide efficient material removal in structural and rapid drilling tasks. The bit is fitted with a 1/4" quick-change shank for easy use in standard hand drills and quick-change chucks.

Advantages

Double cutting spurs score the wood outside the hole to reduce breakout and produce a cleaner edge. A thicker cutting edge increases life under demanding use while the BLUE-GROOVE point and cutting edge improve chip removal and speed up drilling. The slightly enlarged shank dimension adds durability and stability during operation, and the 1/4" quick-change shank enables fast bit swaps without additional adapters.

Suitable for

• Drilling large through-holes in softwoods, plywood and chipboard
• Rapid structural and framing work where fast material removal is required
• Installing pipes, conduits or wiring that require wide bore holes
• General carpentry tasks requiring rough, straight holes

Key specifications

• Diameter: 40 mm
• Type: Spade (flat) drill bit for wood
• Shank: 1/4" quick-change compatible
• Cutting features: double cutting spurs and thicker cutting edge
• Chip evacuation: BLUE-GROOVE point and cutting edge for faster removal
• Durability: reinforced shank for improved strength

How to use

Fit the spade bit securely into the drill chuck or quick-change adapter. Mark the center of the intended hole and start drilling at low speed to allow the spurs to score the wood, then increase speed while applying steady pressure. For through-holes, support the workpiece underneath where possible to reduce tear-out at the exit. Periodically withdraw the bit to clear chips and prevent overheating during extended runs.

Usage recommendations

Use in handheld drills with adequate torque; for large-diameter holes in hard or engineered timber consider pre-drilling or using an appropriately rated bit. Keep the cutting edge clean and sharpen or replace the bit when wear reduces performance. Wear eye protection and secure the workpiece before drilling.