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IndustryArena Forum > Mechanical Engineering > Linear and Rotary Motion > Break away torque calculation of lock nut against rotating/acceleating bolts?
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  1. #1
    Join Date
    Nov 2019
    Posts
    4

    Break away torque calculation of lock nut against rotating/acceleating bolts?

    I have a Scenario where my lock nut is tightend using a prevailing torque of 14 Nm (as mentioned by the manufacturer) on to the rotor placed between bearings (But the tightening direction and the rotor rotating direction is same unfortunately). The lock nut is loosened after particular life cycle of usage as the rotor rotates with a acceleration of 1230 rad/sec and every time it starts, the sudden acceleration loosens the lock nut. Is there a simple approch to calculate a appropriate prevailing torque for this situation, so that the lock nut does not loosen up when the rotor starts accelerating towards it's max RPM of 9400 in 1 second?

  2. #2
    Join Date
    Jul 2018
    Posts
    6254

    Re: Break away torque calculation of lock nut against rotating/acceleating bolts?

    Hi - Use the recommended torque but use a thread locker liquid on it. Loctite or similar. Cheers Peter S

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