I. The Y81 serises hydraulic metal balers press the leftover of all kinds of metal material (steel shavings, scrap teel, scrap aluminium, scrap copper, scrap stainless steel) to be qulified furnace with shape of cuboid, octagon, cylinder and so on, which not only decrease the cost of trasportation and smelting, but also increase the speed of casting. The Y81 serises hydraulic metal balers are applied in steel factories, recycling industries and ferrous metallurgical works. II. The features 1. They are hydraulic driven with alternatives of manual or PLC control. 2. Bale-discharging alternatives: Turn out, push out, forward or manual discharing. 3. No footing bolts needed during installation; 4. There are ten grades of baling force form 100to 500 tons; The productivity ranges from 6 to 60 tons per day.