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Recent content by MattieG

  1. MattieG

    Torque to Back drive a worm and wheel gearbox.

    Many Thanks to everyone for your help. I agree the only way to be certain is to fit a brake. We shall continue testing. Thanks Again Matt
  2. MattieG

    Torque to Back drive a worm and wheel gearbox.

    Thanks Dennyd & Simongee for your assistance. The system is driven by a DC motor, with max power of 1kW @ 4800RPM. It is controlled through simple control gear, but the motor does get shorted out when stationary. The motor and Gearbox are coupled to the driven device through a sprocket & chain...
  3. MattieG

    Torque to Back drive a worm and wheel gearbox.

    The reason for the question is that we have a 60:1 worm gearbox fitted to an application, with around 25Nm load on it. My feeling was that it should not back drive, which would eliminiate the need for a brake etc. However, in service the system creeps down. I have considered modifying the...
  4. MattieG

    Torque to Back drive a worm and wheel gearbox.

    Hi All I am having difficulty in determining the torque required to back drive a worm and wheel gearbox. I have calculated the efficiency of the gearbox when the worm is driving and when the wheel is driving. I understand that when the efficiency of the wheel driving is less than zero the...
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