Effect of Spindle Speed, Feedrate, Tool Geometry, and Polyester & Vinylester Blends on Surface Roughness and Surface Hardness Alteration of the Hole

In this study, 2 types of polymers were mixed, namely polyester and vinylester called polyester-vinylester blend (PVB) as the test workpiece. The experiments carried out testing surface quality hole, roughness (R a ), hardness alteration (SHA) after drilling. effects spindle speed ( n ) & feedrate f cutting-edge angle K r PVB composition P%V% tested. results showed that factor most influenced value was with contribution 39% (32%) for dominantly polyester. Whereas in dominant PVB, influential is (50%). For measurement occurs, affects (44%) While influencing (44%).