Do diamond blades get dull? Yes—but not in the same way as traditional toothed steel blades. Diamond blades lose effectiveness when the industrial diamonds wear away or the bond "glazes" over, hiding sharp diamonds under a smooth surface. That's why a blade can look fine yet cut slowly, burn, chip, or vibrate. This guide brings together practical field checks and fixes to help you diagnose dullness quickly, decide whether to revive or replace, and prevent premature wear.
You should cut control joints in concrete to a depth of about one-quarter to one-third of the slab’s total thickness. This depth ensures that the joint effectively controls cracking as the concrete cures and contracts. For instance, if you’re working with an 8-inch concrete slab, the saw cuts should reach approximately 2 to 2.7 inches deep. Maintaining this ratio helps direct shrinkage stress into the joints, minimizing the risk of random or uncontrolled cracks across the surface.
