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In Pyramid Design, bottom rolls rotate along fixed axis. While top roll moves up- down to bend the profile.
With all 3 rolls driven, jobs are rolled with minimal scratches. It is economical, rugged design but results in long flat ends.Which need to be cut or pre-bend separately if undesirable
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In Double Pinch Design, both bottom rolls traverse up-down allowing curving of even ends while top roll position is fixed. With all 3 rolls driven, jobs are rolled with minimal scratches. Ideal for bending full circles, rings. Can form smaller diameter rings compared to Pyramid machines
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offers Tube Section Bending Machines From 
Italy. Machines to bend sections to large diameter arches, rings, coils, spirals.
