HOT FRICTION SAW VS COLD CUT OFF SAW

Cold cut off Saw: the metal is cut off by rapidly rotated circular saw at room temperature, the cut off end face is level and smooth like a mirror.

Saw cutting: commonly known as cutting saw, computer flying saw, also known as friction saw. High-speed cut-off accompanied by high temperature, sparks, cutting the end was purple, more flash burr.

1.Sawing method 
Cold cut off Saw: Slow rotation by HSS steel saw, milling cut the pipe, it can attend burr-free and noise-free. The sawing process produces very little heat, the saw blade has little pressure on the pipe and it won’t cause the deform of pipe wall.
Hot friction saw: flying saw use high-speed rotation of tungsten steel saw, the heat generated by contact with the pipe to make it break down,actually it is blown. Surface shows high fuel marks and it cause a lot of heat, the saw blade bring a lot of pressure on the steel pipe which resulting in quality defects like tube wall nozzle deformation.

2.Length precision
Cold cut off Saw: fixed length ± 2.0mm, the same specification repeatability ± 0.5mm no need second length, saving process and raw materials 
Hot friction saw: ± 2.5mm, most need offline length sub-cut, Waste human energy and raw materials

3.Cutting quality 
Cold cut off Saw: very small internal and external burr, flat and smooth milling surface, no need follow-up processing, saving the process and raw materials 
Hot friction saw: large internal and external burr,need flat-chamfering and other follow-up, increase human energy and raw materials consumption costs

Hot cuting saw working quality  VS  Cold cuting saw working quality

4.The Mill Configuration 
Cold cut off Saw：Imported Yaskawa/Simens servo drive motor +cutting saw motor+cutting saw feeding motor, operating table+Eletrical cabinet
Hot friction saw:DC or AC drive motor+cutting saw motor,operating table

5.Safety
Cold cut-off saw：max linear velocity 200m/min，Even if the accidental explosion of the saw blade will not cause damage to the personnel and equipment
Hot friction saw：max linear velocity 800m/min，If the accidental burst of the saw blade will cause damage to the personnel and equipment

6.Operation Interface
cold saw : Clear, simple, rich information, simple settings can achieve excellent cutting effect
Hot friction saw：The operation interface has less information, and it is difficult to judge the state of the equipment it can not change the cutting effect.