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What is the difference between a single-thread screw rod and a double-thread screw?


The single-thread thread has a small helix angle (not easy to slide), and the friction force formed by the screw and the nut is large (has the ability to self-trivial, the lead of the double-thread thread with the same pitch is 2 of the single-thread thread lead. Times, but the self-locking ability decreases after the thread lead is increased. Simply put, the comprehensive force is perpendicular to the normal direction of the thread, and after acting on the surface of the thread pattern, it is decomposed into axial and radial component forces. Thread with a large lead has a small axial force