Cutting speed depends on your project’s materials, and feed speed mainly depends on materials of workpieces and the diameter of end mills. However, cutting parameters like speed is also affected by machine tools and its system. Shape of workpieces and how it is clamped, etc., so the cutting speed and feed speed should be adjusted appropriately according to actual situations.
The efficiency of cutting speed is affected by many things. Its materials, milling ways, etc. As for the selection of HSS solid spiral cutters and tungsten carbide solid spiral cutters, it depends on your workpiece. But if you want to cut cost and to have a quicker speed, tungsten carbide solid spiral cutters with long service is absolutely your best choice.