What factors are affecting the friction of the rolling linear guide pair?

The friction force of a rolling linear guide pair refers to the resistance caused by various friction factors that hinder the movement of rolling elements and sliders, reflecting its friction performance. It is also one of the important performance parameters of a rolling linear guide pair and must be considered as one of the optimization selection objectives when selecting a guide pair.

The analysis of the factors affecting the friction force of the rolling linear guide pair is as follows:

During the motion of the rolling linear guide pair, its contact state, working performance, and stiffness may vary due to differences in its structural parameters and working conditions. The causes of friction in the rolling linear guide pair are multifaceted, mainly including the friction between the rolling elements and the raceway, the frictional resistance generated by the rolling elements' spin motion, and the friction of the rolling elements in the reversing device. It includes pure rolling friction generated by elastic hysteresis when the rolling elements of the guide rail pair move in the raceway, differential sliding friction generated by the contact between the rolling elements and grooves at different speeds at various points on the contact surface, impact friction of the rolling elements entering and exiting the reversing device, friction of the rolling elements in the reversing device, and frictional resistance generated by the relative sliding between the rolling elements due to their sliding friction and the viscous effect of lubricants.

Lubrication is an important factor affecting friction during the use of guide rail pairs. The quality of lubrication conditions is closely related to the friction coefficient of linear guides. When other conditions are the same, good lubrication can help reduce friction and extend service life.