4 Inch Industrial Zirconia Abrasive Disc

4 inches (100mm) is the go-to size for compact angle grinders—the lightweight workhorses used in 60% of precision metal grinding tasks where maneuverability matters. Our abrasive disc is precision-machined to this exact dimension, with a 5/8-inch (16mm) arbor hole that locks securely into standard 4-inch angle grinders (compatible with Makita, Bosch, Dewalt compact models, and more). No adapters needed—just mount and grind. 

Fiberglass Reinforced Backing: A thick, rigid fiberglass core resists warping and tearing, even when grinding at full speed. It prevents disc breakage during accidental contact with hard surfaces (e.g., concrete floors or metal clamps).​
Heat-Resistant Resin Bond: The zirconia grains are locked in place with a phenolic resin that maintains adhesion at extreme temperatures. This eliminates “grain shedding” and extends disc life in continuous-use industrial settings.​
Balanced Machining: Each disc undergoes dynamic balance testing to reduce vibration—critical for precision tasks like tool sharpening or component finishing.