Modeling cinch connector


Lets create some more details. So, select the circle you first created, the one you see on the upper image, the small one. Extrude that circle to left by 10mm (when extruding left you need to input -10 in command line). Since you last used command, we got left Both Sides to On, click on that text to turn it off, and make sure we still have no on Cap.

Now, we will create profile for our cap to finish off that extruded circle. Here you will find very handy to have Osnap options Cen and Mid to on. Using Sweep1 command, use that profile, and sweep along the extruded circle edge. Refer to image below:


Ok, we’ll create another circle, and again, it will be centered in the origin, so start command, and type in 0,0 as center of circle, and confirm with enter and next type in 9 as our circle will be 9mm in diameter. Offset that circle by 0.2 to inside.


Extrude both circles with ExtrudeCrv command by 6mm left. That will again require inputing the negative value into the command line. This time, make the Cap=Yes, and Both sides still to No.



In this final step, we will make more details to the last part we created extruding the two circles. It is a good idea to isolate other parts, just to simplify modeling. You can either do that by hiding the objects, or placing them in hidden or locked layers.

First, we will make a Rounded 4 millimeters wide and longer than our part. Start command, and before you do anything else with it, click on Rounded.


Extrude that rounded rectangle just outside your tube object, and after that create a line in the top viewport on millimeter (1 boxin grid) from right corner.


the cylinder using command with the line we created (do that from top viewport). And, also, split the extruded rounded rectangle with that line too. You can delete bigger part of rounded rectangle, but leave both parts of the cylinder. Next, trim the bigger part of your cylinder with the smaller part of extruded rounded rectangle. (If it appears that your extruded rectangle part is acctually in two parts, just join them). off the outer part of your cilinder. And then, delete the lower leftover…


In the upper image, there are two big surfaces and one that connects those two, and you can join those three using command. Next, from Right viewport, using ArrayPolar command copy that part 4 times around 0,0 as center.

Using command, fill the gap between the inner and outer cylinder and two polar arrayed parts.


Arraypolar that part (the yellow one in the upper image) like you did for those 4 parts, and join everything together, and unhide using command. And you are done!


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8 Responses to “Modeling cinch connector”

  1. Rich says:

    Nice tutorial, what about the 4 finger grips? 🙂

  2. Ivan Vuzem says:

    thanks. Yeah, I’ve been meaning to make a tutorial for that as well, as one of the visitors requested it. But you will notice that I usually leave some parts out, just so you can try something on your own. After all, you will learn much more if you go and discover things on your own…

  3. leyla says:

    how can i do the last sweep2 comment?> to close the cap between inner and outer surfaces?bcz i cant draw a line between them so sweep2 isnt working thanks

  4. Ivan Vuzem says:

    if you are referring to “Using Sweep2 command, fill the gap between the inner and outer cylinder and two polar arrayed parts.” then you actually don’t need any lines. You already have those 4 parts that we arrayed polar, and two tube surfaces. All you need is their edges.

  5. Wagner Lip says:

    Indeed good hints and tips.

    You give me inspiration to try my own RCA jack male plug.

    Several work was doing differently, but the result is astonishing, thank you for the push.

    I don’t know why, but TRIM doesn’t work as it should. For all the “escavations” I use [Solid, Difference] when the second solid disappear leaving the “difference”, it works anyway.

    You can see pictures at

    I wonder how can I make reflections with Rhino, as for example one RCA jack appears reflected at the shinning metalic grounding at another jack, or at the base surface (as you did).

    cheers, thank you.


  6. Peter says:

    Nice tutorial. I just started using Rhinoceros (have used it for about 2 hours so far) and I feel that I am slowly picking it up.

    Just one question. For step 3, I cant seem to get the Sweep1 command to work for me. What lines do I have to select on the extruded cylender and what values should I enter at the Sweep1 prompt?


  7. Ivan Vuzem says:

    well you must use that arc profile curve and “drive” it on the circle. But, you could also create sphere in the center of that curve, and then split the sphere in half…

  8. ranu says:

    i m nt getting the exact thing…wen i trim it..the (6)sections r shown hollow in mine

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