Bosch 2608587158 CYL-9 Ceramic Drill Bit 4mm

It performs best on ceramic tiles, porcelain and ceramic surfaces. It also handles glass and soft stone to a degree. It’s not intended for hard stones or metal drilling, where a more specialized bit would be recommended.

Key specs: 4 mm diameter, carbide-reinforced tip for durability, designed for dry drilling (no cooling water required), optimized spiral for dust removal, CYL-9 shank for secure chuck fit, and multi-material compatibility (tiles, glass, soft stone).

Mark the hole location, secure the workpiece, and start with a slow drill speed. Apply light, steady pressure and let the bit do the work. Keep the drill perpendicular to the surface and withdraw occasionally to clear dust. No cooling liquid is needed for dry drilling.

CYL-9 is Bosch’s shank system that ensures a secure fit in standard drill chucks, reducing slippage and improving control during drilling.

Yes. It’s designed for tiles and can also handle glass and soft stone. For glass, using light pressure and steady motion helps prevent chipping.

Use a pilot mark, start at a low speed, apply gentle, steady pressure, and avoid side loading. A light touch and straight drilling path help keep surfaces clean and chips minimal.

Compared to a 3 mm ceramic bit, this 4 mm bit creates slightly larger holes with similar dry-drilling performance and carbide durability. For alternative sizes, you can review these options on Fepy: Bosch 2608587138 CYL-9 Ceramic Drill Bit 3mm (https://fepy.com/product/bosch-2608587138-cyl-9-ceramic-drill-bit-3mm) and Bosch 2608587160 CYL-9 Ceramic Drill Bit 5mm (https://fepy.com/product/bosch-2608587160-cyl-9-ceramic-drill-bit-5mm). Additionally, Makita ceramic tile bits offer similar capabilities at: https://fepy.com/product/makita-ceramic-tile-drill-bit-4mm

4 mm is a common size for smaller anchors and pilot holes in ceramic surfaces. If you need a larger or smaller hole, other sizes are available from compatible ceramic drill bits on Fepy. Consider the hole diameter required by your fasteners or fixtures and the tile thickness when selecting a size.

Dry drilling generates a lot of dust; keep the bit clean and free of debris. Use a steady, light touch to avoid overheating, and store the bit in a dry place to prevent corrosion. Inspect the carbide tip regularly and replace if visibly worn or chipped.

Wear eye protection and a dust mask to avoid debris exposure. Secure the workpiece, keep hands away from the drilling area, and disconnect power when changing bits. Use proper clamps and maintain a firm grip on the drill to prevent slips.

This bit offers precise drilling, durable carbide-tip performance, and dry-drilling convenience with a CYL-9 shank for reliable chuck fit. For value, it combines Bosch quality with specialized ceramic drilling capability suitable for both professionals and DIYers. Return options are typically offered by Fepy policy; check the current listing for any available returns on this item.