Un rodamiento especial de bolas de una o varias hileras, rígido o autoalineable, y construido con un vástago sólido o hueco, roscado interna o externamente.
rigid alignment type, 0.8750 inches nominal overall outside diameter, 0.3390 inches minimum and 0.3490 inches maximum outer ring width, 1.6600 inches minimum and 1.6720 inches maximum length from bore center to shank end, 0.8110 inches minimum and 0.8130 inches maximum inner ring width