By varying the drill tip design, one can optimize the machining of different types of material.
A standard twist drill has a tip angle of between 115 degrees and 145 [1]. By changing this angle, you can create optimal cutting and chip removal for different types of materials. For example, a flat angle [2] may be advantageous for drilling copper and a FORWARD angled drill bit[3] may be advantageous for drilling thinner plates to minimize burr formation and deformation.
There are also special grinding applications where the drill bit part closest to the center line has a GREATER angle than the portion of the bit that is further out toward the drill edge.
