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Cold pilger mills are used for the reduction of tubular products of all ferrous and non-ferrous metals. Beside the classic applications for bearing tubes, stainless steel tubes and copper tubes, tubes of nickel-based alloys, high-strength special metals, titanium and zirconium alloys are also produced. High reductions, simultaneously of the diameter and the wall thickness, are performed at a superior quality level.
Technical Data
The cold pilgering process relies on four main actions: The tube moves forward and it rotates while the ring dies move back and forth and rotate.
The reduction ratios reach more than 90% in the case of copper and some of its alloys, austenitic stainless steels and some nickel alloys, and even the brittle bearing steels are reduced by around 70%.
The various mill types cover the diameter range from 4 to 280 mm and diameter-to-wall ratios of between 40:1 to 3:1.
Ingoing tube lengths of up to 25 m are possible.
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