Excessive tension causes excessive internal stress, leading to crack and breakage. Insufficient tension results in blade wandering and vibration, causing fatigue fracture from repeated bending.
Worn, eccentric or misaligned wheels twist the blade during operation. Burrs, rust or welding spatter on wheel surfaces scratch the blade body.
Improper gap or offset of guides forces the blade to twist and squeeze.
Wrong tooth direction leads to abnormal cutting force and rapid tooth/band breakage.
High speed for hard materials causes overheating and softening of teeth. Low speed for soft materials leads to chip clogging and blade tearing.
Over-depth cutting overloads individual teeth and causes root fracture.
Cutting pipes, hollow profiles or stacked workpieces generates frequent impact and fatigue damage.
Stopping or lifting the saw during cutting creates reverse impact and breaks the blade.
Narrow blades for thick workpieces or wrong tooth pitch reduce rigidity and accelerate breakage.
Poor base material, weak weld joints (common break point) and unqualified heat treatment.
Micro cracks form after long service and eventually cause fracture.
Shifting workpieces apply irregular pulling and twisting force on the blade.
Unstable footing, damaged bearings or motor failure amplify vibration and fatigue.
Chips or debris stuck between the blade and guards cause jamming and breakage.
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