Bearings,as important components in contemporary mechanical equipment,mainly support the mechanical rotating body,which can reduce the friction coefficient during its movement and ensure its rotation accuracy.
VW series roller bearing according to difference of seal type can be divided into iron cover seal (no suffix, such as: RM1) and rubber cover seal (name of X suffix, such as: RM2-2RS) two kinds
If using stainless steel material, the name will be the words with the SS, such as: W3SSX
207-27-51220 bearings are used in the Excavator Final drive system of KOMATSU：
207-27-51220 BEARING KOMATSU parts PC250LC-6LE PC300-5 PC300-3 PC300-5K PC310-5
