hello all, can anybody tell me how to define the helical shape

or should i use a spling to define the shape

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4 Answers

line + helix + connect curve(between helix and line) = join.1

rotate "join.1 180 degre" = join.2

connect curve (between join1 and join 2 on topside) + join.1 + join.2 = join.3

use sweep to give diameter thickness.

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