The characteristics between the rolling balls and raceways are the key to study a linear rolling guideway (LRG). In this paper, the contact stresses of an LRG with off-sized balls incorporating the variation of the contact angle are given by the established LRG joint model. Moreover, the effect of the location, number, and the deviation degree of the off-sized balls on the stress distribution are studied. In addition, the contact stress distribution between the balls and raceway for different arrangement cases of the off-sized balls are analyzed. The random arrangement case can improve the stiffness and service life of the LRG. Based on the Archard wear theory, the wear prediction model of the LRG is established and the displacements and angular displacements of the slider caused by wear in reciprocating motion are obtained. The effectiveness of the contact stiffness and wear prediction model of the LRG is verified by simulations and analysis.

滚动球和滚道之间的特性是研究线性滚动导轨（LRG）的关键。在本文中，LRG 与包含接触角变化的大尺寸球的接触应力由建立的 LRG 关节模型给出。此外，研究了超大球的位置、数量和偏差程度对应力分布的影响。此外，还分析了不同尺寸滚珠排列情况下滚珠与滚道之间的接触应力分布。随机排列的情况可以提高LRG的刚度和使用寿命。基于Archard磨损理论，建立了LRG的磨损预测模型，得到滑块往复运动磨损引起的位移和角位移。