mameman,
as they told you ,
download Easm viewer , download from CNCrouterparts the cad files, look for the biggest file which ends like .easm
Open the file and use the buttons to move the full drawing. At the left push the assembly button and you can see all the individual parts, high-lighten or hide any of them. Also you will see the measure tool, you can push it to activate then select surfaces ,edges, points, circles, etc. at the drawing and measures will show , just look for the axial measures, like x, y ,z. Then clear and select other. It can not be more simple.