cutting tool material drill angle

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Accepted Answer

Cutting tool material and drill angle are important factors for efficient machining.

The cutting tool material should be selected based on the workpiece material and the machining operation.
High-speed steel (HSS) is commonly used for drilling operations, while carbide is preferred for high-speed machining.
The drill angle affects the cutting action and chip formation. A larger drill angle results in a more aggressive cutting action.
For general-purpose drilling, a drill angle of 118 degrees is commonly used.
For drilling harder materials, a drill angle of 135 degrees is preferred.
The drill point geometry also affects the cutting action and chip formation. Different point geometries are used for different materials and applications.

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