Drill Bit Irwin diamond-tipped cylindrical for glass and ceramic 8 mm (10507895)

Diamond-tipped cylindrical drill bit by Irwin with an 8 mm cutting diameter, designed specifically for drilling glass and ceramic tiles. The diamond coating on the cutting head delivers wear-resistant cutting action that helps produce precise, clean holes with reduced chipping in brittle materials. The cylindrical shank fits standard drill chucks and the bit is intended for use at low to moderate rotational speeds with water or coolant to extend life during glazing, tile installation, repair and DIY tasks.

Advantages

The diamond-coated cutting edge provides consistent cutting performance and improved abrasion resistance compared with standard carbide bits, enabling clean holes in glass and glazed ceramic. The 8 mm diameter is suitable for many common fittings and fixtures, while the cylindrical shank offers compatibility with most handheld and bench rotary drills. The bit’s design supports accurate, chip-reduced drilling when used with appropriate speed and cooling, resulting in less rework and better finish quality.

Suitable for

• Drilling holes in annealed and tempered glass (with proper technique)
• Cutting holes in glazed ceramic tiles and porcelain
• Installing fixtures that require precise 8 mm holes
• Repair work and DIY projects involving brittle materials

Key specifications

• Cutting diameter: 8 mm
• Tip: diamond-coated cutting surface for abrasive-resistant cutting
• Shank type: cylindrical, compatible with standard drill chucks
• Recommended speed: low to moderate RPM for brittle materials
• Cooling: wet drilling or intermittent contact recommended to reduce heat
• Material suitability: glass, glazed ceramic, porcelain

How to use

Secure the workpiece on a stable surface and mark the drilling point. Use a drill press or a steady handheld rotary drill with a properly tightened chuck. Start drilling at low speed and apply light, consistent pressure; allow the diamond tip to abrade the material rather than forcing the bit. Use water or a suitable coolant to keep the tip cool and to flush debris, especially when drilling ceramic or thick glass. Progress gradually and avoid sudden side loads; once the hole is complete, slow the drill and withdraw carefully to minimise chipping.

Usage recommendations

For best results, clamp the material securely, start with a shallow pilot engagement, maintain low to moderate speed, and use continuous or frequent cooling. Avoid excessive force and high RPM to prevent overheating and premature wear of the diamond coating. Inspect the bit for wear before extended use and replace when cutting performance diminishes.