Valve Seat Cutting Boring Machine LD 180 is suitable for repairing the valve seat of automobiles, motorcycle, tractor and other 80engines. It also can be used to drilling and boring etc. The machine features are air-floating, vacuum clamping, high positing precision, easy operation.The machine is set with grinder for cutter and vacuum check device for workpiece. Machine Features Air floating,auto-centering,vacuum clamping,high accuracy Frequency motor spindle,stepless speed Regrinding cetter …