HSS Cobalt Fully Ground Drills are high-performance twist drills designed for precision drilling in tough, high-strength materials. These drills are made from High-Speed Steel (HSS) with an added percentage of Cobalt, typically 5% to 8%, which enhances their hardness, wear resistance, and heat resistance. The process of being fully ground refers to the manufacturing technique where the drill bit is precision-ground to its final form, ensuring superior sharpness, accuracy, and a smooth cutting edge.

Key Features:

1. Material Composition:
   • HSS with Cobalt: The addition of cobalt to high-speed steel increases the drill’s heat resistance and hardness, allowing it to perform at higher speeds and under more intense heat conditions compared to regular HSS drills.
   • Cobalt Content: Usually 5-8% Cobalt, which provides improved performance in tough materials such as stainless steel, alloy steel, and high-carbon steels.
2. Fully Ground Construction:
   • Fully ground drills are made using advanced grinding techniques that ensure precise geometry, reducing the risk of wobbling and ensuring a smoother, more accurate cut.
   • This grinding process also improves the cutting edges and point geometry, which helps with faster and cleaner drilling, even in challenging materials.
3. Durability & Wear Resistance:
   • The addition of cobalt improves resistance to wear and increases the tool's life span, especially in tough or abrasive materials.
   • Cobalt drills maintain their sharpness and cutting ability for a longer period, reducing downtime and tool replacements.
4. Heat Resistance:
   • The high cobalt content allows these drills to withstand higher temperatures without losing their hardness, making them suitable for high-speed drilling or continuous operations where heat buildup is a concern.
5. Applications:
   • Ideal for drilling in hard and abrasive materials like stainless steel, cast iron, tool steels, and other high-strength alloys.
   • Widely used in industries such as aerospace, automotive, manufacturing, and metalworking.
6. Precision and Accuracy:
   • The fully ground process ensures that the drill bit maintains strict dimensional accuracy, which is essential for precision drilling applications, especially in critical or delicate workpieces.
7. Chip Removal:
   • The geometry of the drill is designed to promote efficient chip removal, which reduces friction and heat during drilling.

Advantages:

• Extended Tool Life: Cobalt drills tend to last longer, making them cost-effective over time.
• Improved Performance: Higher cutting speeds and more precise drilling capabilities.
• Versatility: Can be used in a wide range of materials, especially harder and heat-treated alloys.
• Consistency: The fully ground design ensures consistent quality and precision across multiple drill bits.

These drills are a reliable choice for professionals seeking precision, durability, and efficiency in demanding applications.