Part Numbe: 6814882 7013575 6815119 7013581 6693489 7019167. Side cover: QT 450-10, strength as follows: tensile strength ob (MPa): 2450 yield strength 00.2 (MPa): 2310 hardness: 160 ~ 210 hb. Roller: 45 # carbon steel or 40 Cr.
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