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3D Modeling: Drawing a 3D Bearing in 15 minutes

11 June 2008, Wednesday 10:54 Print This Post Print This Post


Author Murat Saraldı
Profession Mechanical Technician
  AutoCAD Instructor
Location Izmir, TURKEY
e-mail  

AutoCAD 2007 and later

Hi,

You’ll comprehend drawing a simple 3D bearing with standard dimensions by using REVOLVE and 3DARRAY commands. All dimensions of our drawing is free.

Fig.1
Figure.1 The final view of the bearing.

First of all, we have to draw the 2D object in the figure below. The pint here is it must be polyline. You can draw it with lines and then modify it by PEDIT command.

Fig.2
Figure.2 The 2D Figure to construct our bearing.

The blue line in the figure which has an important role in drawing the rest is the axis of our bearing. After completing the drawing, switch to SW isometric view and REVOLVE the figure.

Fig.3
Figure.3 Switching to Isometric View

Command:_revolve
Select objects to revolve: (Select the inner section)

Select the inner section.

Fig.4
Figure.4 Typical wiew during Revolve command

Specify axis start point or define axis by [Object/X/Y/Z] Specify our axis.

Define the axis by implying the endpoints of our blue line.

Specify angle of revulation or [STart angle] <360>: Revolve Angle

Press ‘ENTER’ to 360 default.

Now, let us utilize SPHERE command to construct our balls.

Fig.5
Figure.5 The Completed Bearing Skeleton

Command: Sphere

Fig.6
Figure.6 The selection of center and quadrant

To construct one of our balls, click the center of the circle and then the quadrant. We are going to use 3DARRAY command to get 23 of those balls.

Command: 3darray
Select Objects: Select our sphere and press ‘ENTER’.
Enter the type of array [Rectangular / Polar] : Type ‘P’ and press ‘ENTER’.
Enter the number of items in the array: type ‘23’ and press ‘ENTER’.
Specify angel to fill (+=ccw, -=cw) <360>: Press ENTER.
Rotate arrayed objects? [Yes/No] : Press ‘ENTER’.
Specify center point of array: Specify the axis. Pick the endpoints of the blue line.

Fig.7
Figure.7 You should see a figure like above if you have done everything correctly.

Let us now REVOLVE our last part.

Command:revolve Select objects to revolve:
Select the outer part.
Specify axis start point or define axis by [Object/X/Y/Z] :
Pick the endpoints of the blue line.
Specify angle of revulation or [STart angle] :
Type ‘270’ and press ‘ENTER’.

Fig.8
Figure.8 The final state of our model

If you have done all processes mentioned above, you would get a model like the one above. You can check it out in shaded mode by typing ‘SHADE’ and press ‘ENTER’.

Those who are using version 2007 can get the figure above by pressing ‘Conceptual‘ Visual Style.

Regards.

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3D, 3D Modeling, Autocad

4 Responses to “3D Modeling: Drawing a 3D Bearing in 15 minutes”

  • 1
    Mohammed AW Naser
    June 14th, 2008 23:43

    Hello Mr. Murat Saraldi,
    Your this lesson is not clear one because you have not given the OD of bearing.
    Hope you will be rectifing at earliest.

  • 2
    soe nu nu win
    June 20th, 2008 12:43

    Hi friend,
    now i am learning about of 3d drawing autocad.i want to trim in the middle of the box.let me know about of the trim in3d step by step.

  • 3
    Sarjeet Kumar
    June 21st, 2008 10:39

    Dear Mr. Murat Saraldi
    That work is good but 15 Minutes is more for this work.
    if you have full dimensions so I can do that work in just 3 to 5 minustes.

    Sarjeet Kumar
    9810120639

  • 4
    paresh
    September 10th, 2008 14:29

    dont give this too much simple examples on net

    give toughest and likely to be interesting

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