Taper roller bearings are designed to carry both thrust and radial loads and consist of four components: the cone, or inner ring; the cup, or outer ring; the tapered rollers, or rolling elements; and the cage, or roller retainer.

Item: 30311 bearing 
Type: Taper roller Bearing 
Size: 55X120X31.5

Weight:1.63KG
Material:GCr15
Similar type:Black chamfer ,White chamfer
Place of  Origin:Zhejiang,China(Mainland) Quality  standard:ISO9001:2000
Service:OEM service accepted
Basic load ratings Cr:153.3KN 
Basic load ratings Cor:187.6KN
 Feature: 

1.vibration resistance 
2.high swiveling accurany 
3.low friction, long service life