I design a high pressure pump piston and a piston insert using helical features(cut and protution) and sweeps cut and protution. And it isn't allowing me to dimensionon any type of views rounds, diam., etc any suggestion will be apreciated. Here are some picks off my models.
pump piston
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piston insert
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dwg
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pump piston
View attachment 2505
piston insert
View attachment 2506
dwg
View attachment 2507