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Hello friends Welcome To freead tutorial
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and in this tutorial we will learn a
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subtractive Helix feature in
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freecad you can also visit my website
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Mech nexus.com where I write articles
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and tutorials on freead you can download
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my tutorial source file from the here if
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you like my method of teaching then
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please support me on coffee.com you can
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buy me a cup of coffee your small
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support will help these channels to grow
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and it will motivate me to create more
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freead I will provide my website and my
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Kofi donation page Link in a video
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descriptions so let's come back to our
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tutorial if you see this image so
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subtractive helic tool modify a solid by
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swipping a selected sketch or 2D object
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along alongs the Helix Fox cutting away
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so if I create a new file then here is a
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tool known as additive Helix and this
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one is known as a subtractive Helix when
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we use the tool additive Helix then it
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adds the material and subtract to Helix
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removes the material additive Helix is
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used to create a spring type of a
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material uh spring type of a body which
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having the peit and height and similarly
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subtract to hel both are the similar
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tool the only difference is that one is
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used for adding of material and other is
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subtraction so let's uh do a simple
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exercise to understand the subtract to
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Helix feature in freead so first I will
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body and if we go to the image then we
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can easily see here this is
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the profile B is a cutting along the
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provided data here Peach and height to
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let's come to our body and I will On the
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Origin plane and I will select a top
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plane and create a sketch and here I
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circle and I will give it a diameter
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of 100 mm and I close
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it I will off the origin plane select my
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sketch and click on the pad and pad I
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1550 now we will create a profile and
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use this subtract to Helix feature so
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for this we again on the origin plane
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and we will select this exit plane and
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sketch then we off the plane and we will
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change model transparency to the
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wireframe and now I will uh create a
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circle and I will project this uh Outer
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Edge and uh I will add the vertical
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relation and I select these two points
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and add the vertical Dimensions let's
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mm and I will give this
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Dimensions now I will switch to the flat
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lines and I will come out of the sketch
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now we have this circle now we will
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remove the material in the form of
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Helix so I will select my sketch and
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click on this subtract to Helix
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processing so you can see that uh here
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we have the pitch of 15 mm height is
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46.7 so we will keep as it is and click
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Okay so it is a processing so it is
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processed now we will press the space
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bar and hide this pad now you can see
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that uh a material is removed along the
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Helix like this and now let's we change
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the value CL click on the edit Helix and
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here on height Let's uh we make a height
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Pitch let's change the pitch as well
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let's make a peach of 20 mm uh sorry
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let's make peach of a 12 mm and click on
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processing so it got processed we will
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press the space bar and hide this pad so
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you can see that uh how the material
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removed and we can modify our Helix
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again if we want so this is how you can
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use the sep to Helix features and this
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feature is used to create a thread
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profile if you are creating external
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shaft so this feature is very useful so
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this is all about this tutorial how to
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use the subtractive Helix in freead
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thank you for watching and thank you for
