Trapezoidal Screw vs. Ball Screw: The Ultimate Technical Comparison
1. Fundamental Design Differences Parameter Trapezoidal Screw (ACME Thread) Ball Screw Working Principle Sliding friction (metal-to-metal) Rolling friction (ball recirculation) Contact Type Surface contact Point contact Backlash 0.1-0.5mm (requires anti-backlash nut) ≤0.05mm (eliminable with preload) Self-Locking Yes (when lead angle < friction angle) No (requires brake) 2. Performance Characteristics Load Capacity: Load Type Trapezoidal Advantage […]
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