HAND, PNEUMATICALLY OR OLEOPNEUMATICALLY- OPERATED ROLL MARKING MACHINES FOR THE MARKING OF CYLINDRICAL PARTS.These machines work on a line and thus make deep penetration marking possible. They are very useful for marking......HAND, PNEUMATICALLY OR OLEOPNEUMATICALLY- OPERATED ROLL MARKING MACHINES FOR THE MARKING OF CYLINDRICAL PARTS.These machines work on a line and thus make deep penetration marking possible. They are very useful for marking parts to be subsequently hardened or ground.The hydraulic pressure regulation system allows small irregularities in the workpiece to be absorbed. In roll marking, there is no blow and delicate parts can be marked without deformation