Drill bit Dedra DED1579, Ø 3.5 cm, steel, for stone, terracotta, glass, ceramic (1 pc)

Dedra DED1579 drill bit, Ø 3.5 cm, is a single steel drill bit designed for drilling hard and brittle materials. It is intended for use with compatible rotary drills and is suitable for creating clean openings in stone, terracotta, glass and ceramic surfaces. Supplied as one piece, this drill bit is built for targeted perforation tasks where a larger hole diameter is required.

Advantages

The steel construction provides durability and sufficient rigidity for drilling into dense materials while maintaining a compact single-piece design. The tool is optimized for cutting through brittle substrates such as ceramic tiles and glass, reducing the risk of cracking when used at appropriate speeds and with correct technique. Its 3.5 cm diameter makes it suitable for applications that require a wide clear opening without the need for multiple smaller holes.

Suitable for

• Making openings in ceramic tiles for plumbing or electrical fixtures
• Cutting holes in terracotta and decorative ceramics
• Drilling glass panes for routed fittings or hardware
• Creating passage holes in masonry and natural stone

Key specifications

• Diameter: 3.5 cm
• Material: steel cutting body
• Intended materials: stone, terracotta, glass, ceramic
• Quantity: 1 piece

How to use

Mount the Dedra DED1579 drill bit securely in a compatible rotary drill chuck. Mark the drilling point and, where appropriate, use masking tape on tiles or glass to help prevent slipping. Start at low speed to establish the hole, applying steady, moderate pressure and keeping the drill perpendicular to the surface. For glass and ceramic, use cooling or intermittent drilling to avoid overheating and reduce the chance of cracks. After reaching the required depth, withdraw the bit carefully while the drill is still rotating to clear debris.

Usage recommendations

Use appropriate personal protective equipment including safety glasses and gloves. For best results on glass and glazed ceramics, use coolant or water to minimise heat build-up. Match drill speed and pressure to the material: lower speeds for glass and ceramic, moderate speeds for terracotta and stone. Inspect the bit before use and replace if worn or damaged.