Diamond blade trouble shooting bore hole out of round

Symptom: Bore hole out of round
Cause:a.Saw arbor badly worn due to improperly seated blades.
          b.Blade flanges not properly tightened permitting blade to rotate on shaft.
          c.Blade flanges or arbor shaft worn and not providing proper blade support.
Remedy:a.Be certain the blade is properly seated on arbor before tightening flange.
             b.Always wrench tighten the arbor nut. Never hand tighten. Always use hex nuts. Never use wing nuts.
            c.Check blade flanges or arbor shaft for wear. Both flanges should be no less than that recommended by the manufacturer. Replace worn parts.

Turbo segmented diamond blade