Q: What is the minimum diameter of the internal coolant flat bottom drill?

A: The current minimum diameter of the ADF-2D external coolant model is 0.2mm, and the current minimum diameter of the ADFO-3D internal coolant model is 3mm.

Q: How many times the diameter can the flat bottom drill drill? How about the straightness of the drilling?

A: The ADF-2D external coolant model recommends 2D, and the ADFO-3D internal coolant model recommends 3D. The straightness data depends on the processing 

conditions.

Q: How to ensure the centering of the flat bottom drill?

A: Because the center part adopts R-type cross-edge grinding, it has a better centering effect.

Q: Does the flat bottom drill not need a center drill?

A: Under normal circumstances, it is not necessary, unless in extreme cases, such as when the overhang is very long.