Spacer for linear motion apparatus and linear motion apparatus provided with spacer

摘要

A spacer for a linear motion apparatus which is to be interposed between balls arranged in an endless circulation passage of the linear motion apparatus, said spacer having a body portion comprising spherical retaining surface portions formed for supporting the balls on both end portions thereof in an advancing direction of the spacer when moving in the endless circulation passage and a circumferential side surface portion, wherein said circumferential side surface portion is formed with at least one slit extending in a direction normal to the advancing direction of the spacer so that one of the spherical retaining surface portions is elastically deformable towards another one thereof in the advancing direction