BEI MT40D-X-HSS256N-128T-GD4-X-S-C14-S-5,TK Encoder

The BEI MT40D-X-HSS256N-128T-GD4-X-S-C14-S-5 TK Encoder is a BEI Motion Systems rotary encoder that provides feedback to motion controllers by reporting angular position and rotation speed, enabling precise control of automated machinery, CNC equipment, and other automation systems that depend on real-time position data. Carrying the MT40D-X-HSS256N-128T-GD4-X-S-C14-S-5 TK designation, this device belongs to BEI's MT40D family and is marketed under BEI Motion Systems by distributors and catalog listings that identify it by this model string. Available through multiple distributors and online marketplaces, the MT40D-X-HSS256N-128T-GD4-X-S-C14-S-5 TK model shows up in listings described as MT40D-X-HSS256N-128T-GD4-X-S-C14-S-5 TK, with some dealer pages explicitly labeling the unit as refurbished. In practical terms, this model serves as a feedback device for motion control systems where precise position data is required to synchronize motors, servo drives, PLCs, and other control hardware across automation lines, machine tools, and robotic subsystems.