The HFH 71904CDGA/P4A is a high-precision angular contact ball bearing, specifically designed for applications requiring exceptional rotational accuracy and rigidity, such as machine tool spindles. This bearing features a 20mm bore, 37mm outer diameter, and 9mm width. It incorporates a 15-degree contact angle (C) for optimal performance under high speeds and axial loads. With a P4A accuracy class, equivalent to ISO Class 4 or ABEC 7, it ensures superior precision. The 'G' designation signifies universal matching, allowing for flexible mounting in various arrangements.