Free Shear® Chip

Conventional Chip

The Free Shear® chip is obtained by using a rake angle that is designed for the specific workpiece material you are machining. Once your material is tested, the calculated rake angle applies to all types of cutting tools - lathe tools, milling cutters, drills, broaches, band saws, etc. The metallurgy of the workpiece material reveals the exact way in which that metal wants to be cut. All machinable metals fail at a 45º True Shear Angle when pulled to failure in a tensile test. By designing test samples to measure the events taking place in the tensile failure zone, we can calculate the Free Shear® Rake Angle required to duplicate the 45º break needed to machine your workpiece efficiently.   The correct Free Shear® Rake Angle creates: A chip which has high hardness and is easy to break. A minimum temperature chip. A work hardened chip without workhardening the workpiece material. A cold workpiece which eliminates warpage and is safer to handle. Better tool life. Better chip control and increased efficiency. Increased productivity and profitability.