@thesis{thesis,
		author={Hakim  Lukman Al},
		title ={Pengaruh Sudut Potong Utama (Kr) Terhadap Kekasaran Permukaan Baja Karbon Rendah Yang Dibubut Dengan Pahat Hss Dan Pahat Pegas Daun Mobil},
		year={2017},
		url={http://eprints.polbeng.ac.id/8682/},
		abstract={Conventional machining on lathe one of the influential elements is that the chisel 
should be harder than the workpiece. To get hardness value on chisel made from 
leaf spring FKK PS100 car then heat treatment by using cooler media. In addition 
to obtaining the result of lathe having an optimum surface roughness value is also 
influenced by the main cut angle (Kr) on the chisel. The result of heat treatment 
temperature of 9500
C which was held for 60 minutes with water cooler medium, 
obtained hardness value 62.16 HRC. While the main cut of Cr with the 
parameters of velocity cutting machine (Vc) = 33.9 m / min, feeding rate (Vf) = 30 
mm / min, feeding depth (a) = 1 mm with surface roughness (Ra) 2,176 ?m .}
		}