What factors should be considered when choosing a linear guide?

Core selection factors
Load characteristics: Clarify the actual force situation of the equipment, including rated load, impact load (such as high-speed start stop, processing impact), and force direction (radial, axial, overturning moment). Choose roller guides for heavy-duty or impact resistant scenarios, and roller guides for lightweight and high-precision scenarios.
Accuracy requirements: Select the accuracy level according to the equipment positioning requirements, commonly using C (ordinary), H (high precision), P (precision), SP (ultra precision), UP (ultra high precision) levels. Semiconductor and medical equipment require SP/UP level, while ordinary automation equipment can choose H/P level.
Sports performance: Confirm operating speed, acceleration, and travel range. Priority should be given to ball guides in high-speed scenarios (with low friction and low heat generation). For long journeys, the accuracy of guide rail splicing should be considered to avoid splicing gaps affecting the smoothness of motion.
Usage environment: In harsh environments (dust, cutting fluid, high/low temperature), high protection level (IP65 or above) guide rails should be selected, accompanied by dust covers and sealing rings; Choose non lubricated or low dust leakage models for clean environments (such as semiconductor workshops) to avoid pollution.
Installation and Space: Select the type of guide rail (such as square, flange, micro) according to the installation space of the equipment, confirm the accuracy of the installation surface (requiring milling/grinding processing), and avoid deformation of the guide rail caused by uneven installation surface.
Maintenance and lifespan: Choose long-term lubrication or maintenance free guide rails for high-frequency usage scenarios to reduce downtime for maintenance; Calculate the expected service life based on the rated dynamic load and operating speed of the guide rail to ensure the overall service life of the matching equipment.