Sliding table device

A sliding table device comprising:

• a base unit extending in a longitudinal direction;
• a sliding unit including
• two rails that extend in the longitudinal direction, that are disposed on said base unit, and that are spaced apart from each other in a transverse direction perpendicular to the longitudinal direction,
• two sliding blocks that are disposed respectively and slidably on said rails, each of said sliding blocks having at least one oil inlet, and
• a sliding seat that is mounted co-movably on said sliding blocks and that includes
• a main body portion having a main flow passage that is adapted to be in fluid communication with external environment,
• two fixed portions extending downwardly from said main body portion and mounted respectively to said sliding blocks, each of said fixed portions having a connecting passage that is in fluid communication with said main flow passage, and
• two guiding portions formed respectively on said fixed portions and abutting respectively against said sliding blocks, each of said guiding portions having a guiding passage that is in fluid communication with said connecting passage of the respective one of said fixed portions and said at least one oil inlet of the respective one of said sliding blocks;
• and
• a cover plate extending in the longitudinal direction, disposed above said base unit, and covering a portion of said main body portion, said main body portion further having an insertion hole that is formed in an outer surface of thereof, that is not covered by said cover plate, and that is adapted for interconnecting said main flow passage and the external environment.