Gears, Chains, belts ....

i am working in a factory(since 1 month ago). i am asked to model and design different types of Gears and pulleys. finally i found the a SW plugin which is called GearTrax. does any one knows a concise reference to know about these and to work with this plugin?

You can make gears in SW without GearTrax. Learn to make an involute from equation-driven curves and you're on your way. Look up "involute" on Wikipedia and the equations are there.

DO NOT compromise on gear tooth geometry. I've seen entire product lines fail due to this.

I investigated GearTrax about ten years ago. I compared their output to a true mathematical model of an involute gear tooth. The geometry was good. I'm sure they've only gotten better since.