Location:Ball screws serve as high-precision linear transmission components, and their selection directly impacts the motion accuracy and lifespan of equipment such as machine tools and robots. Under the 2025 Industrial 4.0 upgrade framework, purchasing decisions must consider the following six key dimensions:
1. Precision Grade Matching
C0 (Ultra-Precision): Positioning accuracy ±0.005mm, ideal for semiconductor equipment.
C3 (High Precision): ±0.03mm, suitable for CNC machine tools.
C5 (Standard Grade): ±0.05mm, for general automation applications.
2. Load Capacity Calculation
Dynamic load formula:Pc = (Fa + μFr) × Safety Factor
(Fa: Axial load, Fr: Radial load, μ: 0.2~0.3).
3. Lead and Speed Optimization
High-speed scenarios: Opt for small lead (≤10mm) for enhanced stability.
Heavy-load/low-speed scenarios: Use large lead (≥20mm).
4. Protection Design Selection
5. Preload Method Comparison
Single Nut Preload: Cost-effective, suitable for axial clearance ≤0.01mm.
Double Nut Preload: 30% higher rigidity, ideal for impact loads.
6. Brand and Certification
Prioritize ISO 3408-certified manufacturers (e.g., THK, HIWIN) and verify CE/UL markings.
Selection Decision Flowchart
Confirm equipment precision requirements →
Calculate load conditions →
Match lead/speed →
Choose protection level →
Validate brand qualifications.
