undercarriage parts for komatsu: 1.size:50-1,000mm 2.1M2858,3S0303,5M1177,6Y0860,8E5609, ... 5mm82.5mm31.8mmR1300130mm151mm32mmR1630163.3mm191.2mm38mmR1820182.3mm210.3mm38mmR2650264.9mm292.8mm38mmR3000298mm328mm42mmundercarriage parts for komatsu: Huangshi Ruitong Machine Co,. Ltd. specializs ... engineering plant, transmission engineering plant. is from Φ50-Φ1,000mm, the rigidity is HRC58-62 and its life- ...