Features: 1.The coiling machine produces bonell type spring from steel wire. It is completely mechanical . 2.In a single production cycle, the wire is coiled to spring, knotted at both ends and heat treated. The machine can make different coils springs for mattresses according to different heights and features. 3.A different wire diameter can be used to achieve a different degree of rigidity of springs and spring units. Technical data: Spring type Bonell spring Capacity 65 springs / minute Spring outer dia. 65-85mm Steel wire dia. 1.8-2.5mm Spring turns 4-8turns Weight 1500kg Power requirement 380v/220v, 50hz/60hz. Carton packing.