home > application > maglev
  The virgin operation of Shanghai maglev on December 31 of 2002 was a new milestone in human transportation history. The maglev has the highest speed among land traffic, which is up to 500 km/h. During the high speed operation, the elevated track beam will subject to intense vibration with a frequency quickly varying between 0 to 2000 Hz. To prevent the track beam fastener from loosening under vibration with a quickly varying frequency, three fastening schemes were established, among which there is DTF-Lock nuts. After 90 days of trial operation, DTF-Lock anti-loosening nuts demonstrated outstanding anti-loosening performance. No loose DTF-Lock nut were found on the track beam. The DTF-Lock fastening scheme provided reliable support to the safe operation of the maglev train and further replaced the other two fastening schemes.