Drill bit Bosch WIERTŁO HEX-9 HARD CERAMIC 7×90 mm for ceramic tiles

Bosch WIERTŁO HEX-9 HARD CERAMIC 7×90 mm is a specialist drill bit intended for drilling ceramic materials such as glazed tiles, porcelain and other hard tile surfaces. The 7 mm cutting diameter and 90 mm overall length provide access through tile thicknesses while the hardened ceramic-oriented tip is shaped to produce precise, clean holes with reduced chipping. The HEX-9 shank is compatible with rotary drills and drivers that accept hex shanks, ensuring quick bit changes and secure retention in compatible chucks.

Advantages

The bit combines a hard ceramic-focused tip with a robust shank design to deliver stable drilling performance on tiles and similar surfaces. Its geometry is optimised to reduce cracking and chipping at the hole edge, giving a cleaner finish compared with general-purpose masonry bits. The HEX-9 shank allows fast insertion and a positive grip in hex-compatible chucks or bit holders, improving control during use.

Suitable for

• Drilling holes in ceramic wall and floor tiles for fixtures and fittings
• Installing plumbing outlets, brackets and towel rails through tiled surfaces
• Creating openings for electrical boxes, conduit clips and anchors in tiled walls
• Use with rotary drills or impact drivers that accept HEX-9 shanks

Key specifications

• Drill tip material: hardened ceramic-oriented tip for tile drilling
• Diameter: 7 mm cutting diameter
• Overall length: 90 mm for deeper reach through tile and substrate
• Shank type: HEX-9 hexagonal shank for secure fit in compatible chucks
• Intended use: rotary drilling in ceramic and similar hard tile materials

How to use

Secure the drill bit in a compatible chuck or hex bit holder until firmly seated. Mark the drilling point on the tile and, where possible, apply masking tape to the surface to help prevent sliding. Start drilling at low speed to establish the position, then increase speed with steady, moderate pressure—avoid forcing the bit. For through-holes, drill straight and withdraw periodically to clear debris. If drilling close to edges, reduce pressure and speed to minimise chipping.

Usage recommendations

Use personal protective equipment such as safety glasses and gloves. For best results on glazed or brittle tiles, use a backing support if possible and avoid hammer action settings; use rotary mode only unless manufacturer guidance permits impact. Keep the bit cool by withdrawing periodically to clear dust; if necessary, use light water cooling on the tile surface while drilling cautiously to prevent slippage.