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The most basic and widely used tapered bearing, the single-row type consists of the cone assembly and the cup. It is usually fitted as one of an opposing pair. During equipment assembly, single-row bearings can be set to the required clearance (endplay) or preload condition to optimize performance. Single-row tapered roller bearings have positive roller alignment that ensures true rolling motion and generates a "seating force" that pushes the roller against the cone large rib. This seating force prevents the rollers from skewing off apex, thereby keeping them positively aligned and located against the cone large rib.

Designation:

30220,30221,30222,30224,30226,30228,30320,32220,32221,32222,32224,
32226,32228,32230,32236,32240,32244,32320,32322,32334,32930,33022,
33220,30232,32232,32036X,30236,32236,32938,32038X,30240,32240,32944,
32044X,30244,32244,32948,32048X,32248,32952,32052X,30352X2,32956,
32056X,32960,32060X,30660,31160X2,32964,32064/YB2,32968/YB2,32068X2,
32972/YB2,31072X2,31976X2,31176X2,31080X2,31984X2,31084 X2,31184 X2,31088 X2,31992 X2,31092 X2,31996 X2,310/500 X2,319/530 X2,319/560 X2,310/560 X2,310/600 X2,310/630 X2,319/710 X2,319/800 X2,319/900 X2,320/900 X2,319/950 X2