Diamond Blade Troubleshooting Guide
CAUSES
REMEDIES
SEGMENT LOSS
On masonry saws, the material is not held firmly, which causes the blade to twist or jam in the cut and loosen the segment. Overheating is due to inadequate supply of water or complete loss of water. This is usually accompanied by discolourations which appear on the steel centre near the area of segment loss. Steel centre is worn thin as a result of undercutting by abrasive fines generated during cutting. The steel centre (blank) wears to a knife edge, weakens and causes a segment to be separated. Defective blade collars cause the blade to flutter in the cut or fail to adequately support the blade in perfect alignment. Blade is too hard for material being cut, causing excessive dullness and segment separation due to impact or fatigue. This can also cause frictional heat that can melt the braze when insufficient water is supplied to the blade. Blade is cutting out of round resulting in a pounding impact. Improper blade tension causes high pressure on the segments and subsequent failure of the brazed joint. Inadequate tightening of the blade on concrete saw mounting shaft. This causes drive pin to force its way through blade blank. Dropping saw head with mounted blade particularly on concrete saws. Also dropping objects on unmounted blade distorts blade blanks.
Hold the material firmly against the backstop.
Provide adequate water flow to both sides of the blade. Look for line blockages. On concrete saws, temporary complete loss of water can result from equipment running over the water feed hoses. Use sufficient water to flush fines out of the cut. If generated fine s are highly abrasive, blades with undercut protection. Clean foreign material from the blade clamping disc surfaces, ore replace clamping discs if they are under manufacturer’s recommended diameter. Use the proper blade specifications for the material being cut. Replace worn bearing, realign blade shaft, or replace worn spindle. Make sure the running speed of equipment is specified when ordering blades. On concrete saws, the spindle speed should be checked with a tachometer to ensure that each diameter blade is running at the recommended cutting speed and blade- tensioned speed.
Tighten clamping nut securely.
DISTORTED CENTRE STEEL
Avoid dropping the blade. Protect blade from abuse and handle with care.
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