Saw some of the major considerations

1, the operator operates on protective equipment should be worn before : such as safety shoes, safety glasses, hard hats, ear armor .
2, the cutting machine should have guards or other safety devices .
3 , check the blade for damage masonry drill bits  before use , severely deformed , if damaged strictly prohibited.
4, check the cutting machine chuck is dirty , dirty to clean up after the installation when the spindle or spindle bearings or bushings are badly worn , replace badly worn bushings or new equipment .
5 , when the blade is installed , it must be marked on the blade in the direction consistent with the direction of rotation of the cutting machine . Direction inconsistent phenomena likely to cause cut does not move .
6 , when used if it is wet cutting blade , please add enough cool water .
7 , using a cutting blade if it is dry , dry cutting every 10 to 15 seconds to spin a few seconds to cool the blade , the larger the depth of cut should be step cut, dry cutting blade cooling water cutting, would be more effective .
8 , curve cutting cutting process allowed , not  carbide tipped saw blade allowed to use the side grinding , cutting and side wear curve is likely to cause the blade to use crack, or break off the block matrix .
9 , if the cutting is tilted cutting, cutting depth should not be too large , the cutting process must pay attention to safety , try not to let your body and the blade on a flat surface , the cutting process hear abnormal sounds should immediately stop cutting and check that the blade is damaged, or check the blade mounting screws are loose .
10 , in the course of the event of blockage blade , the blade will become dull , use ceramic or refractory to re-open blade wheel ( the blade that is refractory ceramic grinding wheel or knife , cut a dozen ) , to re- open the blade can be restored after sharpness . 11 , when  metal drill bits the cutting process encountered noise, vibration powerful, should be immediately stopped to check whether the blade cracks or chunking , cracks and off the block , the need to replace the film .
12 , cutting saw blade cutting material 2mm more than the material being cut can reduce the extent of side bang .
13 , if the pore size and cutter blade spindle is not met, can be coupled with appropriate size washers, but should pay attention to during the cutting blade with jitter phenomenon , some words will have to check whether the washer off . If you continue to use washer off , can easily cause the blade when cutting jitter , resulting in loss of circular saw blades and can not continue to use. The side that lost a round blade saw blade wear much less wear and tear on one side , you can see the head from the appearance of the different levels of high and low wear .