Spade drill bit Irwin 10507904 — 5 mm, single-piece for wood drilling

Irwin 10507904 spade drill bit is a single-piece 5 mm paddle designed for fast wood boring and straight holes. The flat profile of the bit enables efficient chip evacuation and stable hole guidance when used in manual or cordless drills. Its construction suits carpentry, electrical cable routing and general joinery where quick, clean holes in soft and hard wood are required. The bit is also indicated for rotary drilling in fragile non-porous materials such as glass and certain ceramics when used with appropriate technique and cooling.

Advantages

The single-piece design improves strength and reduces breakage risk compared to multi-component bits, while the spade profile accelerates material removal for faster drilling. Precise 5 mm diameter ensures consistent hole sizing for dowels, screws or cable pass-throughs. Versatile performance allows use in wood and, with care, rotary-only applications in glass or porcelain when following specific low-RPM and cooling recommendations.

Suitable for

• Carpentry and joinery holes for dowels and fasteners
• Routing holes for electrical cables and conduit
• Quick rough boring in soft and hard wood
• Rotary-only drilling in glass, bottles or porcelain with cooling

Key specifications

• Tool type: spade (paddle) drill bit
• Diameter: 5 mm
• Material compatibility: wood (soft and hard), rotary drilling in glass and certain ceramics
• Design: single-piece construction for improved rigidity
• Intended use: manual and cordless rotary drilling (no hammer action)

How to use

Secure the spade bit in the drill chuck and set the drill to rotary mode without hammer action. Start at low speed—around 300 RPM is recommended—to establish the hole and maintain control. Apply steady, moderate pressure and allow the bit to remove chips; retract periodically if required to clear debris. For rotary drilling in glass or porcelain, use a very low RPM, continuous water cooling and light pressure to reduce heat and prevent cracking.

Usage recommendations

Do not use hammer mode. Maintain low RPM and apply water cooling when drilling glass or ceramic. Wear eye protection and follow standard safety practices. Avoid excessive side load to prevent bending or breakage of the 5 mm spade bit.