... QJ(â??35°), QJF(â??35°)(1). For single-row angular contact ball bearing, being under radial loads, radial force will be ... and 40 degrees. Larger contact angler makes larger radial loading capacity. Smaller bearings are mainly used in machine tools, high-frequency ... motor, gas engine, oil pump, air-compressor, printing machine, etc.(3). Material: Made of bearing steel (GCr15). (4). ...