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How to Rotate a STEP Model Around a Small Feature

Set a rotation center on a STEP model in CADProps, inspect a hole or local feature, then restore the model center when navigation becomes awkward.

CADProps · Engineering guide · Reviewed by CADProps · Updated 2026-11-11 · Editorial policy
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How to Rotate a STEP Model Around a Small Feature — conceptual illustration
CADProps engineering guide · Conceptual illustration

A small hole is easy to lose when a long part rotates around its middle. In the CADProps STEP viewer, use Display → Set rotation center to put the pivot on the area you want to inspect. You can then turn the model around that point instead of repeatedly finding the feature again.

Put the rotation center on a visible face

  1. Open the STEP or STP file and wait for the model to appear. If you want a known example, download the public bearing housing and open it in the viewer.
  2. Find the feature in the full view. Open Display, then choose Set rotation center in the View group.
  3. The viewer asks you to click the model. Click a visible surface near the feature. For a hole, use the surrounding face rather than the empty opening. Press Esc if you want to cancel without choosing a point.
  4. Drag to rotate. The rotation-center marker gives you a reference while you inspect the surrounding geometry. Scroll to adjust the zoom and right-drag to pan as needed.
CADProps bearing housing with the prompt to click the model to set its rotation center
Actual English interface, 11 November 2026. Set rotation center closes the Display panel and asks you to select a point on the public CADProps bearing housing.

Try it at a mounting hole

On the bearing housing, choose the front face next to one of the small holes around the central bore. Rotate a little to inspect the relationship between that hole, the front flange and the cylindrical housing behind it. In this test, the chosen point stayed at the rotation marker while the housing turned around it.

The model's overall X, Y and Z dimensions remained the same after the turn. Changing the viewing pivot changes navigation; it does not move the source geometry or establish a new manufacturing datum. Use Measure when you need a numerical distance. The marker itself is not a hole-center measurement or an inspection result.

Bearing housing rotated around a selected point beside a front flange hole in CADProps
The same sample after a drag rotation. The small marker remains near the selected hole while the model orientation changes; the properties still describe the original geometry.

Recover when rotation feels awkward

Open Display → Restore model center to return the pivot to the model center. Use Fit when you also need to bring the complete model back into view. Restoring the pivot and fitting the model solve different problems: one changes the point you rotate around, the other helps you find the full model again.

If the target face is hidden behind another part, changing the pivot will not expose it. Isolate the relevant assembly component or use a section box to clear the obstruction first. If a click is difficult to place, cancel, zoom closer and choose a visible surface near the area. Do not infer that a hole is absent just because its opening is obscured from the current angle.

Related reading

Original article: CADProps · https://www.cadprops.com/guides/set-step-model-rotation-center/