Hi, Does anybody know how to configure a certain fixed movement distance in an assembly? Maybe I am doing something wrong, but what I want to achieve is: Example: - I mate a cylindric rod (shaft) and with a let us say cube with a shaft dia hole. - concentric - ok, when I make a free drag I can go with a shaft up and down in infinity... - well I want to have limited drag in a defined distance The point is that I want to have limits in movement of certain parts in assembly, how do I accomplish that? Thanks. Oz