Evaluation of rubber seed oil as cutting fluid using minimum quantity lubrication in the turning process of aa6061

At this time, a cooling technique has been developed in the machining process, namely the minimum of drop lubrication, to save the use of cutting fluid. The existence of cutting fluid as a lubrication medium can reduce the friction force between the tool and the workpiece so that the tool life can be extended and decrease the surface roughness value. This study uses the minimum drop lubrication technique and rubber seed oil as a cutting fluid. The turning process is done with carbide inserts and varying flow rates. The results showed that the greater the flow rate of cutting fluid (rubber seed oil), the lower the surface roughness value and the continuous and thinner chip shape. This is in accordance with the flow rate of 0 ml / s cutting fluid has an average roughness value of 2 µm with a continuous chip shape and tends to be thick, the tool experiences cracks and wear. At the cutting fluid flow rate of 192 ml / s, it has an average surface roughness value of 1.729 µm with a continuous and thin chip shape, the tool wears out but does not experience cracks.