Hot coiling of custom large diameter springs is typically done using specialized equipment designed for this purpose. The process involves heating a length of steel wire to a specific temperature and then coiling it around a mandrel to create the desired shape and size of the spring.

The equipment used for hot coiling typically includes a heating furnace, a coiling machine, and a quenching system. The heating furnace is used to heat the steel wire to a specific temperature, usually between 800 and 1000 degrees Celsius, depending on the type of steel being used and the size of the spring being produced. Once the wire has reached the correct temperature, it is fed into the coiling machine, which shapes the wire around a mandrel to create the desired spring shape.

The coiled spring is then quenched in a cooling system, which helps to set the shape of the spring and improve its strength and durability. The quenching process typically involves immersing the spring in water or oil, or using air or water jets to cool it rapidly.

Hot coiling is a specialized process that requires skilled operators and specialized equipment. If you need custom large diameter springs, it is important to work with a reliable spring equipment manufacturer that has experience with hot coiling and can well trained workers to make high quality hot coiled springs.

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