CNC Hollow Riveting Machine 1 For riveting round head, 2 empty heart riveting 3 feed control installment. CNC Hollow Riveting MachineA, for riveting round head, empty heart rivetingB, automatic feeding device, continuous riveting, high efficiency.C, running without operator contact with rivets, safety greatly improved.D, high-performance material clamp and punch, riveting, high strength, and does ...