@thesis{thesis,
		author={Syafi’i  Syafi’i},
		title ={Analisa Pengaruh Besar Sudut Pahat Bubut Dan Variasi Kecepatan Putaran Mesin Terhadap Kekasaran Permukaan Benda Kerja},
		year={2018},
		url={http://eprints.polbeng.ac.id/8826/},
		abstract={The lathe is one of the production process machines used to form 
cylindrical workpieces. The machining process will determine the surface 
roughness at a certain level, this study was conducted to determine the surface 
roughness value of the workpiece, after turning it using a variation of tool angle 
60?, 70?, 80? and engine rotation speed 200 rpm, 300 rpm, 1100 rpm with steel 
material ST37 and allumunium 6061. Based on the results of this study, the lowest 
workpiece surface roughness was found at 1100 rpm rotation speed with a large 
tool angle of 80? on the material type of carbon steel ST 37 at 1.373 ?m, while for 
the Allumunium 6061 material the lowest roughness was found at the speed 1100 
rpm rotation and 60? tool angle with a roughness value of 1.1465 ?m.}
		}