A cylindrical bronze pin of 1 mm radius rests on a rotating steel disk at a mean radius of 25mm. thenormalloadonthepinis10N.300rpman d the test lasts for 10 hrs. The mass losses of the pin and disk are 50 mg and 3 mg, respectively. Using the material data given below, calculate the wear coefficient and wear .(Hardnessofbronze

Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.