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Screw Thread Force Formula:
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Screw thread force (F) represents the axial force that can be safely applied to a screw thread without causing failure. It is calculated by multiplying the allowable stress (σ) by the cross-sectional area (A) of the screw.
The calculator uses the screw thread force formula:
Where:
Explanation: This fundamental engineering formula calculates the maximum force a screw can withstand based on its material properties and geometry.
Details: Accurate screw thread force calculation is crucial for mechanical design, structural integrity assessment, and ensuring safety factors in various engineering applications involving threaded fasteners.
Tips: Enter stress in Pascals (Pa) and cross-sectional area in square meters (m²). All values must be positive numbers greater than zero.
Q1: What is the typical stress value for common screw materials?
A: Stress values vary by material - steel screws typically range from 400-800 MPa, while aluminum screws range from 200-400 MPa.
Q2: How do I calculate cross-sectional area for different screw types?
A: For standard screws, use the tensile stress area which can be found in engineering handbooks or calculated using specific formulas based on thread geometry.
Q3: What safety factors should be applied to the calculated force?
A: Typical safety factors range from 2 to 8 depending on the application, material certainty, and consequences of failure.
Q4: Does this calculation account for shear forces or only tensile forces?
A: This formula calculates tensile force capacity. For shear forces, different calculations and safety factors apply.
Q5: Can this calculator be used for both metric and imperial units?
A: The calculator uses SI units (Pa and m²). For imperial units, convert to SI units first or use appropriate conversion factors.