Fit Coupon Study
Tab And Slot Friction Tests
Read the test question, compare the observed fit, and plan the next coupon.
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Tab Cases
Study tabs, engagement depth, friction, edge condition, and repeated assembly.
Target fit → test geometry → observed fit → next test
Fit Coupon Study
Corner Joint Clearances
Read the test question, compare the observed fit, and plan the next coupon.
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Fit Coupon Study
Repeated Assembly Wear
Read the test question, compare the observed fit, and plan the next coupon.
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Fit Coupon Method
What did this test piece actually teach us about the fit?
Target fit → test geometry → observed fit → next test
01
Target fit
Define how the joint should assemble and whether it must come apart again.
02
Test geometry
Use a small labeled slot-and-tab coupon. Keep the mating part and test conditions consistent.
03
Observed fit
Record force, play, edge damage, and the fit after removal. A drawn dimension is not the result.
04
Next test
Change one variable, repeat the coupon, and compare it with the first observation.
The notebook connects intended dimensions with the real joint after laser cutting. It is an educational testing resource; numerical examples describe a coupon, not ready-made settings for a material.
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