... resistance, longer service life XKS-350 Electro-spark Metal hardening machine, intensify tool Main specification: Weight:15KG Coating Thickness:60µ ... material manufacturing. 4.Extract broken tap,drill..etc in metal workpieces. 5.Processing wear-out parts of blanking,bending ... lengthTimeElectrode diameterM310m5min¢3M510m12min¢5 XKS-350 Electro-spark metal hardening machine, intensify tool