Drill Bit Set GRAPHITE cobalt for metal, cylindrical shank 4.5 mm, 10 pcs

GRAPHITE cobalt drill bit set for metal, cylindrical shank 4.5 mm, 10 pcs is designed for drilling holes in steel and other hard metals. The set contains ten 4.5 mm diameter bits made from high-speed steel with cobalt alloy, providing higher heat resistance and extended service life compared with standard HSS bits. Cylindrical shanks make these bits compatible with standard chucks of hand drills and drill presses, allowing straightforward installation and stable rotation during metalworking tasks.

Advantages

The cobalt alloy composition increases hardness and maintains cutting performance at higher temperatures, reducing edge wear during prolonged or heavy-duty drilling. The 4.5 mm diameter is suitable for common fastening and fabrication tasks, and the cylindrical shank ensures reliable clamping in a wide range of drilling tools. Ten identical bits in one set provide quick replacement on the job and reduce downtime in production or workshop environments.

Suitable for

• Drilling mild and alloyed steels
• Workshop and industrial metal fabrication
• Hand drill and drill press operations
• Maintenance and repair tasks requiring repeated hole-making

Key specifications

• Material: high-speed steel with cobalt alloy
• Diameter: 4.5 mm
• Shank type: cylindrical
• Quantity in set: 10 pieces
• Intended use: drilling metals including steels and other hard alloys

How to use

Select an appropriate drill speed for the metal type and secure the workpiece. Clamp the 4.5 mm cylindrical shank firmly in the drill chuck or press arbor. Use cutting fluid or coolant when drilling hard steels to reduce heat and extend bit life. Apply steady pressure and allow the bit to cut; withdraw periodically to clear chips and avoid overheating. Replace bits from the set as edges dull to maintain consistent hole quality.

Usage recommendations

For best results, pre-drill pilot holes when drilling very hard or thick materials, use a lubricant suitable for metalworking, and match drill speed to the metal grade: lower speeds for stainless and hard alloys, higher speeds for softer steels. Store the set in a dry place to prevent corrosion and inspect bits for wear before use.