TROUBLESHOOTING DIAMOND PRODUCTS SHORT BLADE LIFE Using the wrong blade on a specific material. Use the proper blade specification, as recommended by the manufacturer, depending on your machine power and the hardness and type of material cut. Worn blade shaft bearings, worn blade arbor or misaligned machine spindle. Replace defective parts. Loss of power, resulting from loose or damaged drive belts. Tighten or replace drive belts. Inadequate water flow to the blade. Make sure water hoses are clean and free from any blockages. Ensure clean and correct water flow based on the blade diameter. Power of the machine is too high for the specification. Refer to the application chart to define the proper specification and bond hardness to be used based on the power of your saw. Machine spindle speed too low for blade diameter. Use correct speed/set up for blade diameter or use a larger blade. BLADE WILL NOT CUT Blade is too hard for the material being cut (improper blade specification). Refer to blade application chart for the proper blade specification based on the machine power and type and hardness of the aggregate. Blade has glazed over, probably as a result of being used on a too hard material or cutting to deep in one pass. Sharpen the blade by cutting softer abrasive material to expose diamonds. If continual sharpening is required, this would indicate that the blade specification is too hard for the material being cut. Blade rotation speed too high. Use the correct spindle speed (RPM)for the diameter of blade. Cutting too deep in one pass. Cutting in multi passes is often required. Allow the diamond to do the work. Pushing the diamond tool too hard will cause the diamond to polish and stop working. SEGMENT LOSS The material and/or saw was not held firmly, which caused the blade to twist or jam in the cut. Hold material or saw firmly. Not sawing in a straight line with overcorrecting caused the blade to twist or jam in the cut. Properly align saw to allow straight cutting, avoid twisting the blade in the cut. Deflective flanges which cause the blade to flutter in the cut or fail to properly support the blade in perfect alignment. Clean foreign material from flange surfaces, or replace flanges if they are under manufacturer’s recommended diameter or are bent or deformed. Blade is too hard for material being cut causing the segment to glaze over. The segment separated due to impacts or fatigue. Use the proper blade specification for the material being cut. Overheating due to inadequate supply of coolant (water or air). This usually comes with discolorations on the core in the area of segment loss. Overheating of blades may cause core cracks or segment loss. Wet cutting – provide adequate water flow on both sides of the blade. Dry cutting – periodically allow blades to run out of the cut. The blade will cool in a few seconds so that sawing may continue. Under cutting on steel centre. Segments suffer undercutting from abrasive material or inadequate water supply. Use undercutting protection or increase water flow. If in doubt return blade for inspection. Power of the machine is too high for the specification. Refer to the application chart to define the proper specification to be used based on the power of your saw. ARBOR HOLE OUT-OF-ROUND Blade flanges are not properly tightened, causing blade to rotate or vibrate on spindle. Tighten spindle nut and make certain blade is adequately secured to prevent rotation on spindle. Worn out, bent or dirty flanges which do not allow proper blade clamping. Clean or replace flanges, make sure they are not worn out, and tighten spindle nut properly. Blade not properly mounted. Ensure that the blade is mounted on the proper diameter of spindle. CRACKS IN SEGMENT Blade is too hard for material being cut. Use blade with softer bond. 309
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