Mechanical Advantage
MJTs have a high mechanical advantage for tightening large nuts. To calculate mechanical advantage over standard hex nuts, the following formula is used:
Where:
-
MA = overall mechanical advantage T = main thread torque Tj = jackbolt torque n = number of jackbolts D = main thread pitch diameter d = jackbolt pitch diameter A = torque advantage of jackbolts over tension bolts (with graphite lube A=1.37)
Read more about this topic: Multi-jackbolt Tensioner
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