Transmission between two parallel shafts with adjustable axle distance || Free download 3D cad models

This perfect model is made by Mr.Thang
You help us to design faster. THANK YOU SO MUCH !!!!!! 

I would like to hear what you think...suggestions and comments are welcome!
Thank you!

Added two orange gears and two bars maintain proper gear engagement.


Link to download free 3D models
http://swifttopia.com/1szQ
http://swifttopia.com/1t2Z

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