Free speed 13,300 RPM * 115mm (width) x 6mm (thickness) x 22.2mm (centre bore) * Size 4-1/2" (width) x 1/4" (thickness) x 7/8" (centre bore) Bore 22.2mm * Specification to: EN12413 Specification to: A24R-BF * Max speed: 13,300 rpm Max distance: 80 mps (80 meters per second)