Bosch 2 609 255 131 drill bit Diamond drill bit 19 pc(s)

The Bosch HSS-R 19 pcs diamond drill bit set provides a range of twist drills designed for cutting metal. The set contains 19 drill bits with diameters from 1 mm up to 10 mm, packed in a compact hanging box for orderly storage and straightforward access. The diamond-like coating on the HSS-R bits increases surface hardness and improves wear resistance, supporting consistent hole quality and extended service life under normal metal-drilling conditions.

Advantages

Diamond coating on high-speed steel substrates enhances durability and maintains cutting sharpness during repeated use. A broad size range from 1 mm to 10 mm covers fine to larger-diameter drilling needs without requiring multiple separate purchases. The hanging storage box keeps bits sorted and visible for quick selection and transport, while compatibility with standard drill chucks ensures immediate fitment in common hand drills and drill drivers.

Suitable for

• Drilling through mild steel and other ferrous materials
• General metalworking tasks in workshops and maintenance settings
• Preparing pilot holes and clearance holes for fastening operations
• On-site repair, installation and assembly jobs requiring a compact drill set

Key specifications

• Quantity: 19 drill bits
• Diameter range: 1.0 mm to 10.0 mm
• Material: high-speed steel (HSS-R) with diamond-type coating
• Shank style: straight round shank suitable for standard chucks
• Packaging: hanging storage box for organized transport and storage

How to use

Select the drill bit diameter appropriate for the hole required, mount the straight shank securely in the drill chuck and tighten. When drilling metal, use a steady feed and moderate speed to avoid overheating; applying cutting fluid or lubricant is recommended for improved life and performance. Withdraw the bit periodically to clear chips and restore coolant access. After use, clean chips from the bits and store them in the supplied hanging box to prevent damage and maintain organization.

Recommendations

Use coolant or cutting oil for prolonged drilling sessions, especially in thicker or harder metals. Match drill speed to the chosen diameter and material hardness — lower speeds for larger diameters and harder alloys. Inspect bits for wear and replace when cutting edges are rounded to maintain hole accuracy.