The FAG B71901-E-2RSD-T-P4S-UM is a genuine FAG high-precision angular contact ball bearing, commonly known as a spindle bearing. It features an inner diameter of 12 mm, an outer diameter of 28 mm, and a width of 8 mm. This bearing is designed with a 25-degree contact angle (E designation) and is equipped with 2RSD contact seals on both sides for enhanced protection against contaminants. It utilizes a textile laminate cage (T) for high-speed applications and is manufactured to P4S tolerance class, ensuring exceptional running accuracy. The UM designation indicates universal matching, allowing for flexible mounting arrangements.