... spring of mattress,sofa,furniture,cushion. Automatic Bonnell spring coiling machine is used for producing bonnell spring of ... with PLC and touch screen. The bonnell spring machine is automatic and needs only one operator. Changing parts can ... capacity and low in labor consumption. Automatic Bonnell spring machine Main Technical Specification:Capacity80 coils/minPower Supply3-Phase, 380V, 50HzTotal ...