1Semi-automatic Pipe Cutting Machine. 2Pneumatic Control Circular Sawing Machines. ... Air operated,the hydrauic pressure has the automatic feed,the chucking automatic installment,the movement is steady,the operation ... compound to be possible to lengthen the saw blade life and the section quality.4 Burr free,no dusty. ... 275,300,315300,315,350350,400,455 Pneumatic Automatic Circular Cold Sawing Machine