how to draw a screw in sketch up

Let's run across if this helps.

Offset by setting the units to Meters. I use meters for all 3D press projects. The exported .stl file, by definition, is unitless. If you are modeling with regal dimensions, you'll tell the slicer that the units are inches when you lot import the file.

To create the path for the screw, apply the Helix tool from Bend Maker. I'm modeling 3/viii-16 threads hither. I've set it up for more than turns that I need for the moment. I'll actually exist able to extend the spiral threads after.

And end upwards with this.

Now on to the thread profile. I'm modeling for internal threads and for this using info gleaned from here. Note that I don't run the profile to the middle. This helps to prevent some issues later.

The helix was created every bit a grouping. The group needs to be exploded next. And then I used Upright Extruder to extrude the contour. Follow Me won't work for this. Be patient. This can accept a niggling while due to the geometry being created. After the extrusion is completed, select it all and brand a component. I set things upward so the valley in the contour is centered on the end of the path. Once the geometry of the screw is at that place, the path can be deleted.

Side by side fix to cut the ends off the spiral then it'due south flat at the ends. I draw a rectangle outside of the component and copy it upwardly by some multiple of the threads.

I also edit the component to select there central geometry and delete it.

Then cutting the rectangles to the clipboard (Ctrl+Ten, Command-X) then open the component for editing and use Edit>Paste in identify to paste the rectangles in with the remainder of the geometry.

Select all of the geometry, right click on information technology and choose Intersect>with Selected. Check closely to see that all intersecting edges have been created. When you select surfaces in between the cutting faces the selection should not continue beyond the cutting faces. In the following images you tin can see that isn't the instance with all the thread surfaces. Only zoom in closely and add any missing edges with the Line tool.

Erase the unneeded geometry leaving a section of threads.

Erase the faces on the ends and so copy the section to brand it a scrap longer than yous need. As this is the internal threads you would utilize add together this into your model and intersect the geometry before erasing the unneeded bits. Besides make sure to correct the confront orientation so that information technology volition impress correctly. Concluding image in side by side post.

Source: https://familywoodworking.org/forums/index.php?threads%2Fsketchup-and-drawing-threads-question-for-dave-richards.40774%2F

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