Automatic Hydraulic Scrap Metal Baler for Aluminum . Automatic Hydraulic Scrap Metal Baler for Aluminum Recycling. The PLC mode three ram compacting scrap metal balers prefect for compacting scrap aluminum,scrap metals,steel shavings into the best size 19.6"*19.6" mm. the baler comes with SIEMENS motor,SIEMENS electrical and SIEMENS PLC. which makes the baler works stable,non .