Good product selection, regular observation and maintenance are the keys to obtaining maximum life from wall and floor saw blades. The following notes should assist you to obtain the maximum life expectancy from diamond blades and help keep within Health and Safety guidelines at all times.
 
Blades should be checked regularly for cracks, discoloration and signs of overheating or undercutting. All these faults could lead to diamond segment loss, after which it is unsafe to use the diamond blade further.
 
As most problems occur as a result of incorrect wall saw blade choice, inappropriate usage and faults with the equipment (e.g. motor, machine stability and water/coolant supply), particular attention should be paid to these aspects and to the wall saw blade manufacturer’s instructions before sawing commences. When problems happen during usage, the following aspects should be checked as the most obvious causes and solutions, and the machine stopped to avoid further damage. If these immediate ‘first aid’ measures do not solve the problem, please contact the machine company or call ChinShine Technical Services Dept. for further advice. Do not use the machine again until this is obtained.
 
Whole blade performance

     PROBLEMS ENCOUNTERED                 POSSIBLE  CAUSES                            CORRECTIVE  MEASURES
A. LOSS OF TENSION I BLADE DISTORTION 1.
 
 

 
Saw is not properly aligned.
Blade/bond is too hard for the material
1.
 
 

 
Realign
     2. being cut leading to excessive stress.  2. Select correct blade.
     
3.
Attempt is being made not to cut in a straight line.  
3.
Ensure cutting is straight and blade at 1800 to material being cut.
     
4.
Material has slipped and caused blade to buckle.  
4.
Ensure that material to be cut is firm and stable.
     
5.
Fixing flanges are not of correct size,
balanced or aligned.
 
5.
Ensure that flanges are of correct size, uniformly fitted and adequately (but not excessively) tightened.
     
6.
Blade not properly fitted to spindle.  
6.
Ensure blade is fitted to spindle without excessive play or tightness.
     
7.
Excessive or uneven wear at blade
circumference puts pressure on the core.
 
7.
Check wear patterns regularly and
replace/repair as necessary.
     
8.
Steel core overheating or not sufficiently water-cooled.  
8.
Check cooling system and water distribution.
     
9.
Excessive speed/rpm being attempted.  
9.
Reduce speed.
     
10.
Pre-cut blade has not been used to prepare for deeper cuts.  
10.
Use pre-cut blade whenever possible or appropriate.
     
11.
Blade damaged or dropped during transport or handling.  
11.
Check blades carefully before use.
Replace/repair as necessary.
B.  UNDERCUTTING
This describes the situation when the steel cores/centres wear
1.
 
 

 
Incorrect choice of blade material bond too soft. 1.
 
 

 
Select correct blade
 

 
     2. Cutting into substrate (may lead to loss of coolant).  2. Reduce depth of cut to minimum necessary to prevent cutting through abrasive debris (protective segments may be used to protect the blade in extreme cases).
     
3.
Rotation direction incorrect.  
3.
Correct direction of rotation
     
4.
Incorrect water pressure or supply.  
4.
Check cooling system and water
distribution.
     
5.
Very abrasive materials being cut  
5.
Reduce depth of cut to minimum necessary to prevent cutting through abrasive debris (protective segments may be used to protect the blade in extreme cases).
 C  OVERHEATING  
1
.
Attempting to cut too fast or too deeply in one pass.  
1.
Do not be too ambitious in depth of cut which is possible at one pass. Multiple shallow cuts may take longer, but will protect the equipment and are quicker in the long run.
   This can easily be detected by noting a black or blueish discoloration of the steel core  
2.
Bond too hard can lead to pounding.
 
 
2.
Select correct blade for material to be cut.
     
3.
Excessive feed pressure.
 
 
3.
Reduce feed pressure.
     
4.
Blade spinning freely on spindle.  
4.
Correct fit of blade to spindle.
     
5.
Shaft worn, grooved or damaged  
5.
Replace or repair.
     
6.
Water pressure too low, flow insufficient or unevenly distributed.  
11.
Check cooling system and water
distribution.
D. BLADE WILL NOT CUT 1.
 
 

 
Bond too hard / blade being used on
wrong material, leading to bluntness
blade becomes ‘glazed’.
1.
 
 

 
Select correct blade to achieve the correct bond. Open-up glazed segments by working briefly on very abrasive material.
    2. Machine power inadequate for task (wrong motor, voltage or belt tightness). 2. Select correct motor capacity and voltage: check belt tightness
     
3.
Incorrect or altered direction of cut,
leading to jamming.
 
3.
Realign direction / angle of cut.
     
4.
Segments missing or badly worn.  
4.
Repair blade and replace segments if possible. Otherwise, replace blade.
     
5.
Segments have become smooth and are not cutting, even though not fully worn.  
5.
Open up glazed segments by working briefly on very abrasive material.
     
6.
Excessive coolant causing blade to float or aquaplane.  
6.
Reduce flow of coolant.
     
7.
Excessive motion or play between the carriage guides  
7.
Realign and tighten carriage guides.
     
8.
Insufficient feed pressure / rate.  
8.
Increase feed pressure / rate.
     
9.
Freeback has been reached.  
9.
Blade is worn out, replace blade.
     
10.
Incorrect direction of rotation.  
10.
Correct direction of rotation.
     
11.
Water pressure too low, flow insufficient or unevenly distributed,  
11.
Check cooling system and water distribution.
 

 
 
 

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