... ZGTEK's new generation of automatic ring making machine, the previous model is R-6-400.Easy to operate, you set ... extra butt welding is required, machine can work with carbon steel wires and galvanized wires.Model: R-6-300Input voltage: 380V( ... diameter tolerance: less than 0.16mmWeight: 1200KGVery robust and durable machine bodyLength controlled by encoder, higher precisionProgram-aided size change, ...