Description L.A Shelf wear testing machine with digital display DM-II The tester complies with the requirement of JTG E42-2005 issued by the Ministry of Communication, applicable for varieties of wear tests for sperifications. Technical parameters: 1.Diameter of steel ball: 46.8mmX12 Pcs 2.Total mass of steel ball:5000g±25g 3.Internal diameter of roller: 710-510mm 4.Mains boltage:380V~2200W 5.Rev:30-33r/min 6.Automatic digital display for present