Do You Know The Difference Between Cold Cut Saws And Hot Cut Saws?

Cold cutting saw refers to the rapid cutting of metal by a high-speed rotating circular saw blade at room temperature, with a smooth and mirror like cutting end face. Hot cut saw is commonly known as chopping saw, computer flying saw, also known as friction saw. High speed cutting is accompanied by high temperature and sparks, and the cutting end face is purple with many flying edges and burrs.

Cold cutting saw refers to the rapid cutting of metal by a high-speed rotating circular saw blade at room temperature, with a smooth and mirror like cutting end face.Hot cut saw is commonly known as chopping saw, computer flying saw, also known as friction saw. High speed cutting is accompanied by high temperature and sparks, and the cutting end face is purple with many flying edges and burrs.

Sawing method:
Cold cutting saw: The high-speed steel saw blade rotates slowly, milling and breaking welded pipes, so it can achieve no burrs and no noise. The sawing process generates very little heat, and the saw blade exerts very little pressure on the steel pipe, which will not cause deformation of the pipe wall and mouth.
Hot cutting saw: A regular computer flying saw is a tungsten steel saw blade that rotates at high speed and generates heat when in contact with the welded pipe, causing it to break, which is actually a burning out. Visible high burn marks on the surface. Generating a large amount of heat, the saw blade exerts great pressure on the steel pipe, causing deformation of the pipe wall and mouth, resulting in quality defects.

Scale accuracy:
Cold cutting saw: ± 2.0mm, repeated accuracy of the same specification ± 0.5mm, no need for secondary sizing, saving process and raw materials.
Hot cut saw: ± 2.5mm, most of which require offline secondary fixed length cutting, wasting manpower, energy, and raw materials.

Cut quality:
Cold cutting saw: The internal and external burrs are very small, and the milling surface is flat and smooth, without the need for subsequent processing, saving process and raw materials.
Hot cut saw: The internal and external burrs are very large, requiring subsequent treatments such as flat chamfering, which increases the cost of manpower, energy, and raw material consumption.

Is the difference between a cold cut saw and a hot cut saw only in terms of saw blades?
It is obvious that selecting high-quality saw blades is one of the factors that can achieve good cutting results. There are also many deeper and most important factors that affect the sawing effect, such as abnormal vibrations generated during the operation of the saw machine, large gear clearance, low motor power, improper use of fixtures and coolant ratio, high saw speed, and slow feed speed, all of which can cause damage to the saw blade and affect the sawing effect. Therefore, the quality of the flying saw machine and the application parameters of the saw directly affect the cutting quality of the workpiece, cutting efficiency, and the service life of the saw blade. Professional sawing equipment + professional sawing parameters + high-quality saw blades + professional saw blade parameters = high-quality sawing effect.