... -aligning ball bearings are constructed with the inner ring and ball assembly contained within an outer ring that has a spherical raceway ... Descriptions:1. The self-aligning roller bearing is robust with its inherent self-aligning function. The two rows of ... 23000, 24000, 23200, 22200, 22300, 23100,2410023900,etc. Ring MaterialChrome Steel ,Carbon steel,Stainless steel Tolerance gradeGB/T307.1 ...