Xingtai Spiry Imp&exp Co.ltd is a the leader manufacture of the Necking machine and Thread rolling machine<br /><br />in China.<br /><br />Necking machine: The machine is reduced diameter of metal workpiece without cutting and peeling. Efficient(Process speed is 3-7P/M), stable, high smooth and polishing surface，easily operate and saving raw materials. It could enhance the density of steel, rebar, bolt, and some any other metals so that not reduce the material strength, toughness and other physical properties of material at same time get raised and saving the material for the lost in cut less and peeling. The machine is the new model assist of thread rolling machine. It is best choice of processed mine anchor, anchor building, Anchor bolts, stud bolts, long pole screws and any metal diameter processing.<br /><br />We have export to Europe and we have CE marks.<br /><br />Working diameter is from 10mm to 80mm,necking length is 12-380 mm, necking <br /><br />rate is 2mm.<br /><br /><br />Thread rolling machine :Working diameter is from 6mm to 120mm,pitch is can <br /><br />adjustment as your required, rolling pressure is from 80KN to 700KN.The workpieces