So what is the difference between a cold saw and a normal flying saw in a welded pipe cutting method? The main difference between a cold saw and a flying saw is the difference in the cutting way. The ordinary flying saw is a high-speed rotation of the tungsten steel saw blade, and the contact welding pipe generates heat to break it, which is actually blown. High burning marks are visible on the surface. The cold saw is made of a high-speed steel saw blade that rotates slowly and mills the welded pipe, so it can be burr-free and noise-free. The cold saw is a device that requires very high strength and precision, so the price of the servo motor is relatively expensive. The speed, position and angle control of the servo motor are unmatched by DC and AC motors.