Check the weld strength: grind the back of the turning tool with a green silicon carbide grinding wheel, and check the thickness of the solder layer, which is required to be less than 0.15mm.

Check the position of the blade in the cutter slot: if you feel that the blade of the high-speed slitter is misplaced, re welding shall be carried out.

Check the welding strength: knock the blade with a wooden hammer or red copper hammer with medium force, and it is qualified if the blade does not fall off from the groove.Check the welding strength: knock the blade with a wooden hammer or red copper hammer with medium force, and it is qualified if the blade does not fall off from the groove.

Check the flatness of the blade: if there are pits on the blade of the high-speed Slitter, it indicates that the blade is overheated and deformed, and a new blade should be burned down and re welded.

Check for cracks: if the blade has cracks after being cleaned with kerosene. Kerosene will penetrate into the crack and a black line will appear, which can be observed with the naked eye.