Frequently asked questions.

Frequently asked questions.

What is fast feed milling? and what are the main factors to consider?

Fast feed milling is a machining method that combines a shallow depth of cut with a high feed rate of up to 2.0 mm per tooth. This combination maximizes the amount of metal being removed from a part and increases the number of finished parts in a given time.

Indexable tools with a low-pressure angle of approx. 10°to 15° are often suitable for high-speed milling. Using a low-pressure angle reduces the chip thickness by up to 80 percent compared with tools with a 90° pressure angle. In this type of machining operation, feed rates per tooth (fz) of well over 1 mm are common. A further advantage of high-feed milling cutters is that the cutting forces flow almost entirely in the direction of the spindle. The result is minimal vibration during roughing operations with large overhangs.

A toric tool can imitate these effects. If the depth of cut (ap) is smaller than the cutting radius, the effective pressure angle decreases. The smaller the depth of cut, the more the distribution of forces shifts in the direction of the spindle.