|Edge Strength: Eccentric relief between primary & secondary|
|Double Variable Helix|
|Unequal Flute Spacing on a Raptor 3/6|
- Variable Flute Spacing - Each flute is unequally spaced around the circumference of the end mill, creating an out-of-phase cutting action.
- Double Variable Helix - DVH - The helix angle changes along the cutting edge which further creates an out-of-phase cutting action.
With the exception of hard milling, it's pretty common knowledge that the heat should be removed with the chip and the less heat transferred to the tool the longer the tool life.
We've taken a look at that very carefully and have designed our tools to form chips a bit differently. Chips are formed in the outer rake face of the tools. Instead of the chip traveling all the way down into the gullet of the tools, which causes a lot of friction and heat, and then 6' & 9' formed against the core diameter, we have designed our tools to take a much heavier chip load that most competitors.
By taking a heavier chip load the material is forced to turn on itself in the other rake face and eject from the cut without traveling down the entire length of the rake face. Think of it like throwing a tennis ball to a point 10 feet in front of you vs throwing it directly between your feet.