ATC Centre Drill (CC Bit )

A High-Speed Steel (HSS) Centre Drill is a specialized cutting tool used in metalworking to create precise conical holes at the ends of workpieces. These holes serve as starting points for larger drills or as seating points for lathe centers during turning operations.

Key Features:

• Material: Constructed from high-speed steel, HSS centre drills offer enhanced durability and heat resistance, making them suitable for high-speed machining applications.

• Design: Typically double-ended, featuring a pilot tip and a 60° conical section, they ensure accurate centering and alignment.

• Standards: Manufactured to conform with standards such as BS 328, DIN 333, and ISO 866, ensuring consistency and compatibility across various applications.

Applications:

• Lathe Operations: Creating center holes for mounting workpieces between centers on a lathe, facilitating precise turning.

• Drilling: Providing a starting point for larger drill bits, preventing wandering and ensuring accurate hole placement.

• Countersinking: Forming conical seats for screws or other fasteners.

Types:

• Type A: Centre drills without protective chamfers, used for standard center holes.

• Type B: Centre drills with protective chamfers, designed for center holes requiring additional protection.