Learning Targets
- Collect fit evidence from the tolerance tester.
- Compare tight, loose, and acceptable fits.
- Write a recommendation supported by evidence.
IED Unit 2 • Lesson 2.18
Final Tolerance Tester Review and Recommendation
Focus question: What clearance should be recommended for the next rocket assembly project?
Mission Briefing
Today’s Plan
Use this page with the lesson presentation, your engineering notebook, and the tools or evidence assigned for Recommend a Rocket Assembly Clearance.
Success Looks Like
Your final recommendation names a clearance and supports it with fit data or observations.
LaunchLearnModelCheckSubmit
Opening Prompt
What makes a clearance recommendation stronger than a personal preference?
Connect your response to the decision, evidence, or quality standard required for Recommend a Rocket Assembly Clearance.
Reveal: useful CAD thinking move
A strong recommendation uses repeated fit tests, measurements, photos, and observations to justify which clearance should be used next.
Core Skill
What We Are Practicing
A recommendation should be based on fit evidence.
Testing should identify too tight, too loose, and acceptable fits.
The final conclusion connects Unit 2 to the rocket assembly unit.
Fusion & Fabrication Help
Video Help
How to Design a Print with Perfect Tolerance Every Time
Use this tutorial to compare printed evidence with intended clearances and support a final tolerance recommendation.
Pause, replay, or open the tutorial in a new tab while you work. Follow the lesson requirements when the video uses a different example.
Lesson Interactive
Recommend a Rocket Assembly Clearance
Use the simulated fit results to choose a secure clearance that can still be removed by hand, then cite the matching evidence.
Tester Results
| Clearance | Observed fit |
|---|---|
| 0.10 mm | Will not assemble |
| 0.20 mm | Assembles only with high force |
| 0.30 mm | Usable snug fit; removable by hand |
| 0.40 mm | Free sliding fit |
| 0.50 mm | Loose with visible movement |
| 0.60 mm | Too loose for alignment |
Target: secure, aligned, and removable by hand
Match the recommendation to the stated assembly goal, not simply the loosest fit that works.
Your Task
Recommend a Rocket Assembly Clearance
Use the printed tolerance tester to compare fit conditions and recommend a clearance for the next rocket assembly project.
- Test each labeled fit condition using the same method.
- Record whether each fit is too tight, usable, loose, or inconsistent.
- Compare the results with printing defects or cleanup notes.
- Write one recommended clearance and support it with the strongest evidence.
Quality check: The recommendation cites specific tester results and acknowledges any limitation that could affect the conclusion.
What You Will Submit
Tolerance Recommendation
Submission standard: The recommendation cites specific tester results and acknowledges any limitation that could affect the conclusion.
Resources
Lesson Resources
Lesson 2.18 PowerPoint
Use the lesson slides for guided practice, interactive checks, and the exit ticket.
Introduction to Engineering Design
Return to the IED course hub for units, resources, certifications, and current course information.
3D Printer Certification
Review tool expectations and certification requirements before independent printing.