Which term is synonymous with the angle of lead used for a jack screw?

Which term is synonymous with the angle of lead used for a jack screw?

• A. Angle of Thread
• B. Angle of Friction
• C. Angle of Pitch
• D. Angle of Lead

Answer: (D)

The main idea is the lead angle, which describes how steep the screw thread is. It measures the slope of the helix on the screw relative to a plane perpendicular to the axis, and it is determined by how far the nut moves per turn (the lead) compared to the circumference traveled in one revolution. In a jack screw, this angle governs the mechanical advantage and the effort required to lift a load. The lead angle is defined in terms of the lead (the axial advance per revolution) and the mean diameter, with tan(lambda) ≈ lead / (π d_m). The term that is synonymous with this angle is the angle of lead itself (often simply called the lead angle). The other terms describe different aspects: the angle of thread refers to the helix shape, the angle of friction relates to resistance from friction, and the angle of pitch involves the distance between threads (pitch) rather than the helix slope. Therefore, the matching term is the angle of lead.

The main idea is the lead angle, which describes how steep the screw thread is. It measures the slope of the helix on the screw relative to a plane perpendicular to the axis, and it is determined by how far the nut moves per turn (the lead) compared to the circumference traveled in one revolution. In a jack screw, this angle governs the mechanical advantage and the effort required to lift a load. The lead angle is defined in terms of the lead (the axial advance per revolution) and the mean diameter, with tan(lambda) ≈ lead / (π d_m). The term that is synonymous with this angle is the angle of lead itself (often simply called the lead angle). The other terms describe different aspects: the angle of thread refers to the helix shape, the angle of friction relates to resistance from friction, and the angle of pitch involves the distance between threads (pitch) rather than the helix slope. Therefore, the matching term is the angle of lead.