Abbreviation Used in Analysis of Metal Cutting & Cutting Ratio

Q. A bar of 75 mm diameter is reduced to 73 mm by a cutting tool while cutting orthogonally. If the rake angle is ${15}^{\circ }$ and shear angle is 0.3328 radian. The mean length of cut chip is _____ mm.

1. 76.137

Q. In a turning operation with orthogonal machining the spindle rotates at 270 rpm and the tool is fed at a rate of 0.3 mm per revolution. The depth of cut is 0.5 mm. The rake angle is ${10}^{\circ }$ and the coefficient of friction at the tool chip interface to be 0.5317. What is the value of chip thickness?

1. 0.30 mm
2. 0.40 mm
3. 0.46 mm
4. 0.50 mm