This invention provides a method a method of manufacturing a bed support for a chromatography column is disclosed. The method includes: placing the outer ring of the bed support on a support plate of a machine having a transitional stage; placing the mesh disk into the above ring, pressing another support plate on the mesh disk; rotating the transitional stage; providing a roller attached to the transitional stage with a certain force that is applied over the rim of the ring; and continuously applying the force of the roller onto the ring until a rim of the ring bends then assembles into the mesh disk.