SKF SAF522A Pillow Block Bearing

The SKF SAF522A Pillow Block is a split pillow-block housing from SKF’s SAF series, a two-piece cast unit designed for inch-dimension shafting and mounting on a base with a two-bolt interface. It is intended to accept an SAF family insert bearing—typically a spherical roller, self-aligning ball, or CARB toroidal bearing—depending on bore size, providing a flexible mounting solution for general machinery and belt-driven drives where quick maintenance is valuable. Available materials for SAF split housings include grey cast iron, cast steel, and spheroidal graphite cast iron, enabling choices that balance strength and vibration characteristics. Shaft-diameter ranges for SAF housings span roughly 3/16 to 10-1/2 inches, and sealing options include labyrinth, contact, or heavy-duty designs while lubrication supports grease or oil, allowing tailored maintenance intervals and operating conditions. The housing’s split, two-piece construction is intended to maximize service life and ease of bearing installation and replacements in industrial applications. SKF SAF split pillow housings are designed for robust mounting and straightforward alignment, with options for seals and lubricants to suit different operating environments.