... 7 swing machinery 2, Swing machinery for PC50-PC450, ZAX330-1, ZAX330-3, ZAX240-3,ZAX230-1,ZAX200-3,ZAX200-1 Provide Excavator ... Parts for KOMATSU, CATERPILLAR, KOBELCO, HITACHI.We manufacture Swing Gearbox, slewing Box, Travel reducer, reduction, slewing machinery, swing machinery, swing motor, swing shaft ... 6PC220-7PC220-8PC300-7PC300-6PC360-7PC400-6PC400-7 PC300-7 swing machinery