The THK FBL27D SERIES represents a specialized double slide rail system engineered for light load applications where precision, compact design, and smooth motion are paramount. This model features a 27mm rail width and incorporates two parallel slide rails integrated into a single unit, providing enhanced stability and load distribution compared to single rail alternatives. The system utilizes THK’s advanced LM guide technology, with precision-ground raceways and high-grade steel balls that deliver exceptionally low friction coefficients and minimal rolling resistance. Each rail is manufactured with strict tolerances to ensure parallel alignment and consistent performance across the entire travel length.

Key technical features include a compact cross-section that minimizes space requirements while maintaining rigidity, making it ideal for machinery with limited installation areas. The FBL27D incorporates four-row circular arc groove contacts in the ball recirculation system, which provides high rigidity and excellent vibration damping characteristics. Special seal designs prevent contamination from dust, chips, and other particulates, ensuring reliable operation in demanding environments. The series offers optional configurations with different accuracy grades (standard and high precision) to match specific application requirements, along with various lubrication options for maintenance optimization.

Performance advantages are particularly evident in the system’s smooth motion characteristics and long service life. The double rail configuration significantly increases moment load capacity, allowing the FBL27D to handle complex force applications without compromising positioning accuracy. With friction coefficients as low as 0.001-0.003, the system enables precise micro-positioning and reduces drive power requirements. The optimized ball recirculation design minimizes noise during operation while maintaining consistent performance at speeds up to 2 m/s. These attributes contribute to improved machining accuracy, reduced energy consumption, and lower overall operating costs through extended maintenance intervals.

In industrial machinery applications, the FBL27D SERIES finds extensive use in precision assembly equipment, semiconductor manufacturing systems, and electronic component production lines where multiple axes must operate synchronously with micron-level accuracy. The system’s compact design makes it particularly suitable for robotic end-effectors, tool changers, and measuring instrument stages that require minimal footprint without sacrificing performance. Automotive manufacturing utilizes these slide rails in automated welding fixtures, precision testing equipment, and component transfer systems where reliable, high-speed positioning is essential. The series also serves critical functions in medical device manufacturing, optical alignment systems, and laboratory automation equipment where smooth, vibration-free motion directly impacts product quality and measurement precision.