Drill bit set Bosch 2608521U80 8 pieces HSS for metal and general purpose

Bosch Drill Bit Set 2608521U80 contains eight high-speed steel (HSS) twist drill bits engineered for drilling metal and a variety of general-purpose materials. The set covers commonly used diameters for workshop maintenance, repair tasks and home DIY projects. HSS construction delivers improved hardness and wear resistance compared with standard carbon-steel bits, ensuring consistent drilling performance in thin and medium-thickness metal sheets as well as wood and plastics when appropriate drilling speeds and feeds are used.

Advantages

The HSS material provides good heat resistance and edge retention during repetitive drilling in ferrous and non-ferrous metals. The twist-flute geometry promotes efficient chip evacuation and stable cutting action, reducing the tendency to grab or wander. The set format supplies a practical range of sizes in a compact holder for easy storage and quick selection during work. Compatibility with standard three-jaw chucks and quick-change drill adapters makes the bits suitable for most handheld and bench drilling machines.

Suitable for

• Drilling holes in mild steel and other metals
• General workshop maintenance and repair
• Home DIY tasks involving wood and plastics (with appropriate speed)
• Prototype work and light fabrication

Key specifications

• Material: High-speed steel (HSS)
• Quantity: 8 pieces
• Bit type: Twist drill bits
• Intended materials: Metal, wood, plastics (general-purpose)
• Shank: Cylindrical shank for standard chucks
• Finish: Raw HSS surface suitable for common workshop use

How to use

Select the appropriate drill bit size for the required hole and secure it firmly in the drill chuck. Mark the drilling position and, when working with metal, use a center punch to prevent walking. For metal drilling, use cutting fluid or lubrication to reduce heat and extend bit life; for wood or plastics, adjust to higher speeds and avoid excessive feed force. Start drilling at low speed to establish the center, then increase speed according to material and bit diameter while maintaining steady pressure. Clear chips from the hole periodically to maintain cutting efficiency.

Recommendations

Use appropriate personal protective equipment such as safety glasses and gloves. Match drilling speed and lubrication to the material being drilled: lower speeds and coolant for metals, higher speeds for wood and plastics. Replace bits that show significant blunting or chipping to ensure accurate holes and safe operation.