| 摘要 |
A linear motion guide unit permitted to operate for long service life with substantial maintenance-free for lubrication. The linear motion guide unit has heavy load capacity even with shrinking in construction. The linear motion guide unit is allowed to work with high-speed sliding operation and high tact. To this end, return passages are made inside a carriage of a slider in a geometry lying obliquely upwards of load-carrying races. The return passages are apart away from their associated load-carrying races by a distance less or equal to twice a diametral dimension of a rolling element. End caps are integrally made with spigots each of which is raised above a surface of the associated end cap facing on the carriage, thereby providing any one of forward and aft ends of the return passage. The spigots communicate with lubricant paths extending from lubricating ports made in the end caps.
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