Standard Value of Timing Belt Tension: Entry / Exit Belt for Driving Motor on Samsung SM321Tension (N): 25 N Frequency (Hz): 337.5 ± 10% Remarks: Use the U-505(Tension Gage) Standard Value of Timing Belt Tension: Work zone belt for PCB transfer on Samsung SM321Standard Value of Timing Belt Tension: Work Zone Belt For Driving Motor on Samsung SM321