Force Analysis
Return force = spring force + friction + gravity component. For a 10 kg plate with 20 pins: ~200-400 N. Critical buckling load of Ø8 × 150 mm pin: ~8,000 N. Safety factor: 20x.
How to Calculate Return Pin Diameter Based on Ejector Plate Weight
Key Takeaway: Return pin diameter is usually limited by available space, not load. Even Ø8 mm pins have 20x the buckling load needed for typical ejector plates.
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