Floating Fastener Assembly Without Float

To evaluate the worst case scenario without considering fastener float:

  1. Open the assembly to evaluate.
  2. Create a TolAnalyst study and navigate to the Result PropertyManager.
  3. Under Analysis Parameters, clear Float fasteners and pins.
    In this example, under Analysis Summary, the Min is 48 and the Max is 52, for a total range of 4mm.
To achieve the worst case minimum, TolAnalyst calculates the top plates clearance holes at their LMC size of 11, resulting in a position tolerance of 1. TolAnalyst can then simulate the 105 basic dimension between the holes at 104.
For the axle supports, when TolAnalyst calculates the clearance holes at their LMC size of 11, the resultant position tolerance is 1.0, enabling the 27.5 basic dimension from datum B to the holes to be calculated at 28.

Assembling the parts with the fastener float option cleared, TolAnalyst aligns the clearance holes in the axle supports concentrically with the threaded holes in the top plate, resulting in a worst case minimum of 48.