圈上大峰 Torque Loading Load Raising3(Tightening screw) Eliminating the normal force gives: P=F (sin a+f cos) (cos a-f sin a) tan入=l/(πdm Dividing both numerator and denominator by cos入gives: F[(u/nd)+f] 1-（f/πdm） 49 圈上拼我大修 Torque Loading-Load Raising3 (Tightening screw) .The torque for raising the load is a product of >Force P >Mean radius or dm/2. T= Fdm 1+对dm 2 ndfl .This torque is responsible for >Overcoming thread friction >Raising the load. 5049 Eliminating the normal force gives: tan  = l / ( dm). Dividing both numerator and denominator by cos  gives: Torque Loading - Load Raising3(Tightening Screw)         cos sin sin cos f f P F         m m fl d F l d f P      1 50 Torque Loading-Load Raising3（Tightening Screw） •The torque for raising the load is a product of Force P Mean radius or dm / 2. •This torque is responsible for Overcoming thread friction Raising the load.            d fl Fd l fd T m m m   2