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, Web Notes: Synchronous or Timing Belts are one of the most important part of Power Transmission drives.Timing Belt, 425mm 5M 9mm 85 Teeth 0" x0" x0" Timing Belt, 425mm 5M 9mm 85 Teeth, Dim A (1): 425mm 5M 9mm 85 Teeth, Web Notes: belts exhibit important properties such as fixed speed ratio, no re-tension after installation, low, Web Notes: maintenance with wide variety of power transmission capacities and drive speeds..