Selecting the correct linear guide requires a balance between precision and load capacity. You must prioritize high-grade carbon steel or stainless steel materials to ensure structural integrity. Key technical factors include dynamic load ratings (C) and static load ratings (C0); ensure the guide can handle at least 1.5 to 2 times the actual working load for longevity. Additionally, verify the accuracy classes (N, H, P, SP, UP)—for general industrial automation, H (High) or P (Precision) grades are standard, while semiconductor equipment often requires SP (Super Precision).