Circle cutter drill bit Wolfcraft 8911000 — 1 pc, right-hand rotation, for drilling

Wolfcraft circle cutter drill bit 8911000 is a single-piece, right-hand rotation annular bit designed for drilling precise circular holes in tiles and similar hard surfaces. Supplied as one piece in a polybag with a hanging hole, this tool is intended for use with a drill or cordless screwdriver. The tool features a round 10 mm shank for quick chucking, an integrated centring drill for exact positioning, and a removable centring drill to continue cutting once the centre is established. The body is machined from solid material and coated with industrial-grade diamonds for long life and consistent cutting performance. An internal sponge reservoir must be soaked with water before use to provide cooling and dust suppression during drilling. This annular bit is TÜV-tested for quality and safety.

Advantages

The diamond-coated cutting edge enables accurate, clean holes through glazed and ceramic tiles with a cutting depth of up to 25 mm and a diameter of 68 mm. The round 10 mm shank ensures fast and secure fitting in most cordless screwdriver chucks while the integrated centring drill simplifies accurate positioning and can be removed without tools to continue annular cutting. The solid-turned body and industrial diamond coating increase durability and maintain cutting precision. The built-in sponge for water cooling reduces dust and extends tool life during intensive use.

Suitable for

• Drilling circular holes in wall and floor tiles, including glazed and ceramic tiles
• Preparing socket and fixture installations in tiled surfaces
• Use with cordless screwdrivers and drills that accept a 10 mm round shank

Key specifications

• Cutting diameter: 68 mm
• Cutting depth: 25 mm
• Shank: round, Ø 10 mm
• Rotation: right-hand
• Coating: industrial diamond (ceramic diamond coating)
• Body: solid-turned material
• Integrated centring drill: removable without tools
• Cooling/dust suppression: internal sponge reservoir (requires soaking before use)
• Pack quantity: 1 piece, supplied in polybag with hanging hole

How to use

Soak the internal sponge with water before starting to ensure continuous cooling and dust suppression during drilling. Secure the 10 mm round shank in the drill or cordless screwdriver chuck. Use the integrated centring drill to position the bit exactly at the marked center and begin drilling at low speed to establish the pilot hole. Once the centre is established, remove the centring drill without tools if needed and continue cutting the annular hole at moderate speed, applying steady, even pressure. Periodically re-wet the sponge if necessary to maintain cooling. Avoid excessive axial force and allow the bit to cool between prolonged cuts to preserve the diamond coating.

Usage recommendations

Use appropriate eye protection, dust control measures, and a steady support for the workpiece. For best results on glazed tiles, start drilling slowly to avoid chipping at the surface, keep the sponge wet throughout the process, and allow short cooling pauses during extended use. Verify compatibility of the 10 mm round shank with your tool's chuck before beginning work.