圈上泽文大华 Load Raising-Tightening Screw The torque for raising the load is a product of force PR and Mean radius. d Fd T=Pn× 1+πfd 22 πd。-fl This torque is responsible for >Overcoming thread friction >Raising the load. 圆上清支大华 Load Raising-Loosening Screw Summing the forces in vertical and horizontal directions gives ∑Fx=-P-Nsin2+fN cos入=0 ΣFy=F-Ncos)-fN sinλ=0 2222  The torque for raising the load is a product of force PR and Mean radius.  This torque is responsible for Overcoming thread friction Raising the load. 2 2 mm m R m d Fd l fd T P d fl             Load Raising- Tightening Screw Summing the forces in vertical and horizontal directions gives Fx = -PL - N sin  + f N cos  = 0 Fy = F - N cos  - f N sin  = 0 Load Raising- Loosening Screw