Variable Rake End Mills

SGS Tool Company’s Z-Carb-AP variable rake end mill offers three stages of chatter suppression resulting in a quiet, stable milling operation. In stage one, unequal flute spacing disrupts the rhythmic pattern created by the cutting edge of common end mills. This suppresses the development of damaging harmonics.

New Product Announcements From: 10/30/2008 Modern Machine Shop

SGS Tool Company’s Z-Carb-AP variable rake end mill offers three stages of chatter suppression resulting in a quiet, stable milling operation.

In stage one, unequal flute spacing disrupts the rhythmic pattern created by the cutting edge of common end mills. This suppresses the development of damaging harmonics.

In stage two, the unequal helix design aids in eliminating the damaging harmonics by changing the angle at which each cutting edge enters and exits the material during the milling process.

In stage three, the rake angle determines the size and shape of the chip, as well as the pressure and temperature of the cutting zone. By incorporating the company’s variable rake geometry, the end mill can alter and control cutting dynamic, which suppresses chatter.

The end mill also offers enhanced corner geometry with a tighter tolerance corner radius for more accurate machining and geometry that offers improved shearing capabilities while producing less tool pressure. Lower cutting forces promote longer tool life. Tool life is also extended through the use of the company’s Ti-Namite-A (AlTiN) coating. 

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