The helix angle would be the angle between the thread’s helical path in addition to a line perpendicular towards the screw's axis of rotation. Commonly, a lead screw with a bigger helix angle exhibits minimized frictional losses and so greater effectiveness. Phillips- The Phillips drive layout performs better with screwdrivers https://types-of-roof-damage60369.bloggazza.com/28761541/the-lead-screw-examples-diaries