Full definition
Machined channel (groove) that houses the O-ring. Critical dimensions—width, depth and radii—determine O-ring compression and must comply with AS568 (inch) or ISO 3601 (metric) standards. Typical compression: 15-25% of cross-section diameter. Surface finish: Ra 1.6 μm for static seals, Ra 0.8 μm for dynamic. Incorrect groove dimensions are the leading cause of premature O-ring failure.