Information

Choosing the Right Saw

In selecting a circular saw blade, the following points must be taken into consideration :-

1. Material to be cut
2. Cutting quality & thickness
3. Service life of the blade
4. Machine characteristics 

Their are two types :-

1. Wide Gullet
   - Recommended for cutting granite, refractories, tiles & hard stone,
   - Ideally used in deep cuts for stone slabs,
   - The sawn surface finish is usually satisfactory.
2. Narrow Gullet
   - Recommended for cutting Marble, Ceramic, Glass, Soft Stone.
   - Guaranteeing precision cutting as well as clear edges on polished work pieces. 

Chipped corners :-

1. Check the flange diameter
2. Check the lateral deviation of the flanges
3. Check the perpendicularity of the flanges
4. Check parallelism of the flanges
5. Check eccentricity of the blade

Cuts which are not straight :-

1. Check whether the material is properly anchored
2. Check the dimensions of the flanges
3. Check the tension of the blade
4. Check that the blade is sharpened
5. Check for parallelism error
6. Check the perpendicularity of the flanges
7. Check that the blade is suitable for the material to be cut

Peripheral Velosity :-

The operating speed is strictly related to the hardness and abrasivness of the material to be cut. The correct speed selection has a bearing on the life & cutting speed of the blade.

Vp = (N/60) X [(Dia. X 314)/1,000]

N = (Vp X 60,000) / (Dia. X 314)

Vp = Operating speed in m/sec
N  = Revolutions per minute
Dia. = Blade diameter in mm

Excessice wear of diamond segments :-

1. Material may be to abrasive for the saw selected
2. Operating speed (rpm) too low
3. Cutting speed (vt) too high
4. Inadequate cooling water flow

Excessive side wear on diamond segments :-

1. Check perpendicularity of the flange
2. Inadequate cooling
3. Check the lateral deviation of the blade
4. Check the eccentricity of the blade

Loud high pitch noise :-

1. Operating speed (rpm) too high
2. Dull blade necessitating re-sharpening