The MRC PumPac® series of angular contact ball bearing arrangements from SKF integrate optimized internal designs and uniquely engineered contact angles to reduce operating temperatures and vibration while helping to prevent ball sliding and shuttling in demanding pump applications. These bearings ultimately can deliver ideal performance for centrifugal pumps and other systems typically subject to significant thrust loads while operating at relatively high speeds.


PumPac arrangements incorporate combinations of 40º and 15º bearing contact angles capable of carrying high thrust loads with the 40º bearing without unloading the opposed 15º bearing. As a result, greater axial loads can be applied and the bearing’s operating temperature and vibration levels will decrease for smoother operation and longer service life.

Additional value-added features include machined brass cages exhibiting high resistance to wear even in poor lubrication conditions; CB axial clearance for enhanced ball control and reduced heat generation; ABEC-3 tolerances contributing to less impeller shaft run-out and longer seal life; special heat treatment for dimensional stability; and “V” etched outer diameter to enable simplified installation by clearly indicating the direction of thrust-carrying capability.

The PumPac family of bearing arrangements includes the 8000 Series (one 40º bearing mounted back-to-back with one 15º bearing) for applications subject to thrust loads while operating at high speeds; the 8000BB Diamond Series (two 15º bearings mounted back-to-back) for use when thrust loads are light and radial loads predominate; and the 8000AAB Triplex Series (two tandem mounted 40º bearings matched back-to-back with one 15º bearing) for applications with extremely heavy primary thrust loads. All can be supplied in a wide range of bore sizes.

About SKF
SKF is a leading global supplier of bearings, seals, mechatronics, lubrication systems, and services which include technical support, maintenance and reliability services, engineering consulting and training. SKF is represented in more than 130 countries and has around 15,000 distributor locations worldwide. Annual sales in 2015 were SEK 75,997 million and the number of employees was 46,635. www.skf.com

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