20Y-27-22210 bearings are used in the Excavator final drive system of KOMATSU:
20Y-27-22210 BEARING KOMATSU parts: PC290-8K, PC220LC-8, PC240-8, PC200-8, PC600-8EO,PC850-8EO,PC240-10.
206-26-71270 bearings are used in the Excavator final drive system of KOMATSU:
206-26-71270 BEARING KOMATSU parts:PC300-8, PC350-8, PC360-10, PC350-8MO, PC300-7, PC360-7, PC340-7, PC380-7, PC390-10.