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Ball Mill Finish Calculator

The Ball Mill Finish Calculator can be used when an end mill with a full radius (a ball mill) is used on a contoured surface. The tool radius on each side of the cut will leave stock referred to as a scallop. The finish of the part will be determined by the height of the scallop, amd the scallop will be determined by the stepover distance between cuts.

The scallop height and stepover distnace are proportional to each other. If the contour is on an angle, it must be taken into account.

Enter Information

Enter the tool diameter and surface angle

Calculate Values

To calculate the stepover distance, enter the scallop height and click Calc Stepover

To calculate the scallop height, enter the stepover distance and click Calc Scallop

Tool Dia.