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It will be helpful to see the areas we're constraining, so select Utility Menu > Plot > Areas. We can see that the hole consists of multiple areas (4, in fact). Hold down the left-click and you can see that there are 4 surfaces that make up the inside of the hole. Pick all 4 and click OK. Select All DOF and click OK. The displacement value can be left blank as it defaults to 0. You can now see the displacement is fixed in 3 directions at four placesSymbols appear at the centers of each constrained area indicating that the area is constrained in three directions.

Force on Shaft

Main Menu > Preprocessor > Loads > Define Loads > Apply > Structural > Force/Moment > On Keypoints

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