National Precision Bearing are precision manufacturers of R-Series single row, inch ball bearings, available from 1/8 through 1-1/2 inch bore sizes, and 3/8 through 2 1/4 inch outside diameter sizes. They accept thrust and radial loads, work in high speed applications, are available in open, sealed and shielded configurations, and are available in stainless steel. The 6000 Series are normally used where space limitations are a concern and shaft sizes are relatively large. Deep, honed raceways and heavier races allow greater radial load capacity. The 1600 Series are designed to be interchangeable with standard domestic inch ball bearings, and are available in open, sealed and shielded configurations. They incorporate 52100 steel and ABEC 1 tolerances. The V Groove guide wheel design are precision ground, double row, angular contact bearings, offered in both 52100 chrome steel or 440C stainless steel. . 600 Series are extra small ball bearings with an available outside diameter range of .6299 to 1.0236 inches.