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Even a Small Hook Must Withstand the Load
Reducing Fracture Risk by Detecting Internal Defects - Five-Axis C-Arm X-ray Inspection for Small Me
2026-06-23
Customer Case Study
Even a Small Hook Must
Withstand the Load
Reducing Fracture Risk by Detecting Internal Defects
Five-Axis C-Arm Rotary Cabinet X-ray Inspection for Small Metal Latches and Cast Hooks
Illustration: Multi-angle X-ray inspection of hubs, crank arms, pedals, and suspension links
A flawless appearance does not guarantee a sound interior.
A hidden defect at the hook root or curved transition can initiate a load-bearing failure.
Customer Background
A precision hardware casting company mass-produces small metal latches, connecting hooks, and fastening components for luggage hardware, tie-down straps, tool hangers, and compact connection mechanisms. The parts are small and high-volume, yet their hook roots and joints must withstand repeated tensile loads and impact.
Challenges Identified by the Customer
| 1 Polishing or plating produced an excellent surface finish, but internal porosity, shrinkage porosity, and cracks remained invisible. |
| 2 The hook root, curved transitions, and wall-thickness changes concentrated stress and were also the most defect-prone areas. |
| 3 At a single projection angle, overlapping upper and lower structures could obscure fine defects. |
| 4 Destructive tensile tests were limited to sampling and scrapped the tested parts. |
| 5 Defects discovered only after plating or assembly increased rework costs. |
Our Solution
Based on the hook geometry, root thickness, and critical load-bearing areas, we supplied a five-axis C-arm rotary cabinet X-ray system with a multi-cavity positioning fixture and automated multi-angle inspection program.
|
→
Multi-cavity fixture
Inspect multiple hooks in one setup. |
→
Five-axis imaging
Multiple angles around the hook root. |
Results
After implementation, the customer could inspect multiple hooks in one fixture from several angles without damaging them.
| ✓ Defects identified before polishing, plating, and assembly. |
| ✓ Multi-cavity fixture improved batch coverage. |
| ✓ Fixed angles improved image consistency. |
Customer Feedback
"
"Previously, visual inspection revealed nothing and we had to rely on sampled tensile tests. Now we can identify porosity or cracks inside the hook root before plating, and the multi-cavity fixture makes batch inspection practical."
— Customer Quality Manager (sample quotation)
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