Pillow Blocks & Flange Pillow block bearings, flange bearing units, and take-up bearings units all consist of a housing with a bearing mounted in it. They are available in a variety of materials, mounting configurations and various bearing features. Each mounted unit acts as a system to position the bearing securely for reliable operation.
AST offers two types of insert bearings designed for use in mounted bearing units. Simplistically, they are divided by size with the smaller, miniature insert bearings called "collar clamp ball bearings" and the larger ones called the ER Series insert bearings.

Pillow Blocks & Flange Pillow block bearings, flange bearing units, and take-up bearings units all consist of a housing with a bearing mounted in it. They are available in a variety of materials, mounting configurations and various bearing features. Each mounted unit acts as a system to position the bearing securely for reliable operation.
AST offers two types of insert bearings designed for use in mounted bearing units. Simplistically, they are divided by size with the smaller, miniature insert bearings called "collar clamp ball bearings" and the larger ones called the ER Series insert bearings.