PERENCANAAN POROS DAN BANTALAN PADA CHUCK BUBUT KONVENSIONAL TYPE 3CO A2-12 DI PT. BRT

Abstract

This study was conducted at PT. BRT with the aim of evaluating the impact of not using bearings in the turning process using a conventional lathe type 3CO A2- 12. The main focus of this study is to identify various forms of defects that appear on the workpiece, especially on the wheel axle component, as a result of the absence of bearings during the process. The approach used includes quantitative and qualitative methods, with data collection techniques through direct observation and documentation. The findings show that workpieces that do not use bearings experience defects on their surfaces with a depth of between 0.7 mm and 1.3 mm, while the use of bearings produces a flawless surface (0 mm). In addition to causing a decrease in the quality of the turning results, the absence of bearings also triggers increased vibration, friction, and reduced cutting accuracy. To repair the defects that occur, steps are applied such as sanding, re-turning, and welding, depending on the severity of the damage. Thus, the presence of bearings has a vital role in maintaining precision, process stability, and the quality of the final turning results