Concentric Mates

HELP,

I modeled 2 parts, a block with a hole and a shaft, both with the same
diameter. I'm trying to have a concentric mate and the icon is grayed
out and can't mate them.

Any suggestions on what I'm doing wrong?

Using SW 2004 in Windows XP Pro.

Thank you for your input.

 

are you in assembly or part?

 

Assembly

 

which icon is grayed out, the mate icon or the concentric mate icon?

maybe you have the wrong things selected. make sure you select cylindrical
faces (not edges).

Also, make sure both faces are truly cylindrical. If you did some convert
entities operation and the sketch plane was at an angle to the edge you
selected, the sketch would be an ellipse or maybe a spline. If the hole or
the shaft was created with a revolve, make sure that it was a straight line
parallel to the centerline that created the face you are trying to mate.

Make sure that you are selecting faces from two separate parts, and not
just two bodies within the same part.

Make sure you're not in sketch edit or part edit mode, or in the middle of
some other command for that matter.

Is there some reason why you're not using smart mates? Alt-drag one entity
onto the other.

matt