... or Carbon SteelAligning angle:four degreeIt has self-aligning function,it’s applied in the works for which supporting ... 7Hardness:59-63HRCCertification:ISO9001:2000Type of ball:Tapered bore and spherical boreTechnology:Low noise,High precision and durability.Filed ... ,0000.213 NSK Self-aligning ball bearing 1200K,high revolutions bearing,high quality bearing, low noisy and low friction bearing, bearings ...