Working with Purchased and Multipurpose Parts - Autodesk Inventor 2010: No Experience Required - page 294

FIGURE 6.42 Constraining the base of the motor to the housing
9. Click OK to add the constraint.
10. Only one remaining DOF exists. Click and drag the motor to see that
you can still move in the unconstrained DOF. See Figure 6.43.
FIGURE 6.43 A remaining DOF lets you move the motor.
11. Toggle off the DOF display by selection the icon again.
12. Save your work.