Linear motion guide system with highly-tight sealing units

摘要

A linear motion guide system is disclosed in which a clearance between a slider(2) and a guide rail (1) is closed truly to clear foreign matter away from entering inside the system through any end of the slider(2) traveling on the guide rail (1). Thus, the linear motion guide system is befitting to severe working environment where much foreign matter occurs. A highly-tight sealing unit(3) is provided which is comprised of a cassette(21) constituted with a front panel(23) and an enclosure(22), a sealing plate(20) stowed into the cassette(21), and a rear panel(9) to close an open edge of the enclosure(22). The sealing plate(20) is composed of an intermediate spongy(42) medium(34) flanked by skin layers(33), and lubricant is forcibly absorbed in pores or cells(36) in the spongy layer(42).