Open your CAD software Creo. Click at file > new> name the file> press ok

Select the front plane and click at sketching button to enter into sketching window.

Draw a circle with diameter 5 units and center at the origin as shown in fig below and press ok


Extrude this circle up to the length 5 units make sure to use extrude center symmetric form means same length on the both side of the reference plane.

Now select any circular face of the solid part and click at sketching button.

Again draw a circle concentric to previous circle and make its diameter 6.5 units  and press  ok .


In main window extrude the last bigger circle up to 0.5 units towards outward, as shown in fig, and press ok . Now I will call this new extrude as plate.bolt-support-extrusion


Select the upper surface of plate and click again at sketching icon.  Now we have to draw a small circle of diameter 0.3 units and at a distance of 2.90 units from the center, as shown in following fig, and pres ok. I changed the view to “Hidden line” for better  understanding  just in the sketching window.boundary-hole-sketch


Now we will use extrude cut to make a hole using extrude to selected surface option or any other option you want to apply and press ok .

This hole will be used to place the bolt for joining with other cylinder. So we need to make a pattern of this hole. Select the hole click at pattern and use Axis option  to create 5 holes at equally distance from each other as shown in fig below.bolt-hole-patteren


Now we will use a little power of this CAD software. That is we will mirror the selected part of above model.

For this click at pattern in model tree then press and hold the ctrl key and click at extrude of the plate. After selecting the both plate and the pattern of holes, click at mirror button shown in main window.

model tree
mirror icon




This will ask you to select the reference plane for mirroring. For this purpose select the front plane and press ok.  This will generate the plate with holes on to the other face of solid cylinder that we have extruded first.mirrored-part



To make the hole at the center of the part select the plate surface and click sketching icon then make a circle of diameter 4 units  and press ok to return to main window.main-hole-sketch


Now again use extrude cut with selected surface option and make hole from surface of one plate to the surface of other plate ( through hole). This will complete our cad model of displacer cylinder.main-hole-extrude


In final our Cad model will be look like as shown in fig below.Stirling engine displacer cylinder cad model



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6 responses to “Make displacer cylinder of stirling engine cad model”

  1. :v Avatar

    you could simply put a working plan

  2. jp Avatar

    this is a good tutorial. is the complete tutorial availebel for the stirling engine. I would like to continue with the tutorial.
    Thank you

    1. waqas Ahmad Avatar
      waqas Ahmad

      Hi Jp
      Thanks for your appreciation :). after some days you will surely have the complete tutorials. Now i am writing about some difficult ( for beginner) parts and you may download that CAD models from different posts . Sure it will help you.

    2. ABILASH M Avatar

      This tutorial was very helpful to me .I like to know was these units are in mm or in inches.was this dimension was taken from design data book.

      1. Waqas Ahmad Avatar

        these dimensions were in inches. these were taken from purposed design data.mean calculated by doing reverse calculation from required power output.

        1. ABILASH M Avatar
          ABILASH M

          Thank u sir…….

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