Material:
The screws, augers, spirals and tubes are available from:
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- mild steel (St 37, St 52)
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- stainless steel (1.4301, 1.4571)
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- heat-resistant steel (1.4828, 1.4841)
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- abrasion resistant steel (Hardox 400, XAR 400)
other materials on request
Various designs:
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- cylindrical
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- conical
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- progessive pitch
