GRAZTAI Metal Drill Bit 4.9 x 195 mm

The GRAZTAI 4.9 x 195 mm metal drill bit is a precision-engineered tool designed for reliable performance when working with various metal materials. Its extended length allows for deep hole drilling, while the 4.9 mm diameter ensures accuracy for standard fastening and assembly tasks. Crafted for durability, this drill bit maintains its structural integrity under pressure, providing consistent results in both professional industrial environments and home workshops.

Advantages

This drill bit offers exceptional stability and heat resistance, which are critical factors when drilling into hard metals. The geometry of the cutting edge is optimized to minimize vibration and prevent walking on the surface, resulting in clean, burr-free holes. Its robust material composition ensures a long service life, reducing the need for frequent replacements and maintaining high efficiency during repetitive drilling operations.

Suitable for

• Drilling holes in steel and iron alloys
• Deep hole drilling applications
• Metal fabrication and assembly projects
• Maintenance and repair work in workshops

When it may not be suitable

This drill bit is specifically optimized for metalworking and may not be the most efficient choice for drilling into masonry, concrete, or soft materials like wood, where specialized geometry is required for optimal chip removal. It is also not intended for use with impact drills, as the high-torque, percussive action can damage the bit.

Key specifications

• Diameter: 4.9 mm
• Total length: 195 mm
• Material: High-speed steel
• Application: Metal drilling

How to use

To achieve the best results, secure the workpiece firmly in a vice or clamp to prevent movement. Mark the center point of the hole using a center punch to guide the drill tip. Start the drill at a low speed to establish the hole, then gradually increase the speed while applying steady, moderate pressure. Ensure the drill remains perpendicular to the surface throughout the process to avoid bending or breaking the bit.

What to consider before purchase

• Verify the chuck capacity of your drill to ensure it accommodates the 4.9 mm shank.
• Check the required hole depth for your specific project to ensure the 195 mm length is sufficient.
• Consider using a cutting fluid to extend the life of the bit and improve the finish of the hole.

Usage recommendations

Always wear appropriate eye protection and safety gear when operating drilling equipment. Periodically clear metal shavings from the hole during deep drilling to prevent overheating and clogging.