Carrier Roller: One of our lead products, have high reputation in this field, exported to all over the world. Casting parts Material: 40SiMnTi or 40MnB Whole tempering Heat treatment Surface hardenning Total models: Komatsu: PC60, PC100, PC200, PC300, PC400, D50, D60, D75, D80, D85 Hitachi: EX60, EX100, EX200, EX220, EX300, EX400 Caterpillar: E110, E120, E200B(E320), E240, E300B, E312, E330, D3C, D5, D5B, D5D, D6C, D6D, D6H, D7G, D8K, D65, D75, D85, D155 Deawood: DH220, DH280 Kato: HD250, HD400 (HD450) HD700, HD770, HD800, HD1250, Kobelco: SK07, SK100, SK120, SK200, SK220, SK320, SK400 Sumitomo: SH120, SH160, SH200, SH220, SH280, SH300 Mitsubishi MS110, MS120, MS180 Samgsung: SE210 Want to know more, please contact us.