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.
20Y-27-11570 bearings are used in the Excavator Final drive system of KOMATSU：
20Y-27-11570 BEARING KOMATSU parts：PC150HD-5K，PC180LC-5K，PC200-5C，PC200-6Z，PC210-6，PC210LC-5K，PC220-5C，PC220-6Z
Square hole Farm Machinery ball bearing W208PPB9 are with 1 inch square bore size ,and this bearings are know as DS208TT 9,16S2-208E3,2AS08-1 1/8,AS4508BE,PDNF240/8.
22U-26-21340 bearings are used in the Excavator Slewing gearbox system of KOMATSU：
06000-22326 BEARING KOMATSU parts：22U-26-21340 BEARING KOMATSU parts：PC200-7, PC228US-3-YB, PC210-7-CG
4200411bearings are used in the Excavator Final drive system of Hitachi ：
4200411 BRG.;ROL. Hitachi parts 218HSL, CX400, CX500, CX500DR, CX500S, CX550, EX300-5, EX300LC-5M, EX300LCLL-5, EX300LCLL-5M, EX345USR(LC), EX350H-5, EX350K-5, EX370-5M, EX370HD-5, EX370LL-5M, EX385USR, EX400, EX400-3, EX450MT-5
