Drilling is a well-known machining operation in which the tool, often a multi cutting edge tool, is fed into the work piece while rotating in order to make a hole. As the cutting action happens along the entire cutting edge of a drill, the cutting speeds will vary from the rotational speed of the tool at the edge to zero at the centre. This makes it impossible to have optimized cutting parameters along all points of contact and the centre of the drill will push the metal instead of cutting it.
ASP® for Drills
High-Speed Steel drills are typically made in traditional grades manufactured by conventional metallurgy, but for drills that require higher performance the properties of Powder Metallurgy that ASP® offers are more suitable. ASP® can be used to increase tool life, allow for machining in otherwise too unstable conditions or to machine difficult materials. As ASP® drills allow for higher feed rates they can even outperform carbide drills in some operations and will offer more chipping resistance.
Drill applications include:
- twist drills
- micro drills
- centre drills
- starting drills
- coolant fed drills
- spade drills
- core drills
- countersinks
- counterbores