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Bevel Gears - Kinematics and Product


New member
Hello everyone,
I have problems with my bevel gear model. I have to design the parts in the attached pictures. They are 2 shafts with a Pinion and a Gear. I also want to simulate the motion with the Kinematics. The first shaft moves with the pinion and the gear moves consequently with the other shaft. 647391.jpg
I have followed the following tutorial for the design of the bevel gears: https://www.youtube.com/watch?v=uOAoR6VycKA&t=4068s
With this tutorial I have also understood that the shaft in catia must be in the same "Part" and you cannot create two different parts: "Shaft1" and "Shaft2"... I really don't understand why

I have put the two shaft in the same part (following the aforementioned tutorial) and I am able to simulate the mechanism, even though with a lot of problems :
The first one is that the mechanism is with intersections, the two gear interfere with one another and don't move together.
Moreover another problem is that to design the Shafts I had to put some constraints inside the sketchs of the shaft, but when I try to simulate the mechanism I receive the error "Mechanism cannot be simulated becouse is over constrained" and I don't understand why...

If someone would be so kind to try to help me, you can reply under this thread or send me a PM for more informations.. I can send you the parts and the product so that you could see with your own hands what's going on..


Super Moderator
(sorry - I didn't watch the video tutorial)

Do you have a housing part in the assembly? If not, please add one (it doesn't have to be detailed). Draw both centerlines of the shafts in this housing part - they will be the centerlines of the holes that the shafts rotate about.

Hide the centerlines in the shaft parts.

In the Kinematics;

- the Gear joint should use the two centerlines in the housing.
- the housing part is Fixed
- use Rigid joints to attach each shaft to it's corresponding gear
Last edited:


Super Moderator
Once you're able to simulate the kinematics, you can Hide the housing part. Or maybe Cut it in half to make a nicer picture.