Barden Precision Bearings offer radial, single row and super precision angular contact bearings that are either instrument or spindle bearings under ABEC-7 or ABEC-9 specifications. These separable and nonseparable super precision bearings are produced in diameters ranging from 3/8" (9.5mm) O.D. up to 15 3/4" (400mm) O.D. and also in a variety of shields, cage design, and calibration options.

Hartford Technologies designs single row and double row angular contact bearings. Single row bearings carry both axial and radial loads with a 30° contact angle. Double row bearings carry high axial loads and moderate radial loads. The inner diameter size of Hartford angular contact bearings range from 17mm to 100mm.