While turning which of the following material back rake angle is the largest?
A)Parting off
B)Hard steel
C)Aluminium
D)Cast iron
E)Monel matal

Question

Quizplus · Accepted Answer

Aluminium requires a larger back rake angle compared to other materials listed because it is a softer, more ductile metal. A larger back rake angle helps in efficient cutting by facilitating chip flow away from the workpiece, reducing the force required for cutting and improving surface finish. Hard steel, cast iron, and Monel metal typically require smaller back rake angles due to their hardness and abrasion resistance, while parting off operations focus more on tool strength and geometry for material separation rather than chip flow.

While Turning Which of the Following Material Back Rake Angle