尾传动导轮轴 x 1(Φ4xΦ4.8x42mm)尾驱动小齿(31T) x 1(Φ4.2xΦ19.8x9mm)金属尾皮带传动轮盖 x 2(Φ4.4xΦ14.5x4.5mm)皮带传动轮(19T) x 1(Φ4.4xΦ6xΦ11.75x4.15mm)684ZZ轴承 x 2(Φ4xΦ9x4mm)