The effect of drilling cycle selection on the dimensions, roughness and machining time for St37 steel Available to Purchase

The drilling process with a CNC machine is required to be able to produce good holes. The drilling process with CNC machines can be carried out in several ways, known as the drilling cycle, namely the G73, G81, G82, and G83 codes. In fact, the selection of drilling cycle (G code) in CNC milling has a significant effect on the size and roughness quality, as well as machining time efficiency. Shortening the cycle time of the machining process is also an effort that is always made to increase production capacity. This study reveals the effect of selecting the drilling cycle (G code) on the dimensions, roughness, and machining time of St37 Steel. This research used an experimental method. This experiment used the HSS drill twist cutting tool. The instrument for measuring the dimensions of the hole diameter was a vernier caliper with an accuracy of 0.01 mm. The instrument for measuring surface roughness is the surface roughness tester. Machining time is recorded on the CNC machine. The experimental results show that the selection of drilling cycle (G code) with the same cutting speed affects the dimensions of the diameter and roughness of the hole and affects the machining time.