Timken MM40BS72QUH Quadruplex Angular Contact Ball Screw Support Bearing

The Timken Fafnir MM40BS72QUH quadruplex angular contact ball screw support bearing set is a factory-matched assembly of four precision single-row angular contact bearings with heavy preload (QUH), designed for ball screw support in high-precision systems. Each bearing has a 40 mm bore and 15 mm width, with a combined set width of 60 mm and an outside diameter of 72 mm, and the set weighs about 2.32 lb (1.05 kg). Dynamic rating is 8,160 lbf (36,300 N) per row and static rating is 10,200 lbf (45,400 N) per row, with bearing steel and steel balls and a phenolic outer land riding cage. Used in CNC machining centers, ball screw assemblies, precision positioning systems, industrial automation equipment, and heavy-duty machine tools, the MM40BS72QUH set is intended only as a factory-matched quadruplex assembly for heavy-preload QUH configuration and should not be mixed with unmatched bearings.