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Screw Torque Formula:
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The screw torque calculation formula (T = K × F × D) is used to determine the torque required to achieve a specific clamping force with a threaded fastener. It's essential in engineering and manufacturing for proper bolt tightening and joint integrity.
The calculator uses the screw torque formula:
Where:
Explanation: The torque coefficient (K) accounts for friction and other factors in the threaded connection. Typical values range from 0.15 to 0.30 for standard fasteners.
Details: Proper torque calculation is crucial for ensuring joint integrity, preventing bolt failure, avoiding loosening under vibration, and achieving proper clamping force in mechanical assemblies.
Tips: Enter the torque coefficient (typically 0.15-0.30), the desired clamping force in Newtons, and the bolt diameter in meters. All values must be positive numbers.
Q1: What is a typical torque coefficient value?
A: For standard unlubricated steel fasteners, K is typically between 0.15 and 0.30. Lubricated fasteners may have lower values.
Q2: How does thread pitch affect torque calculation?
A: Thread pitch influences the torque coefficient value but is not directly in this simplified formula. More detailed calculations may account for thread pitch.
Q3: Why is proper torque important?
A: Under-torquing can lead to joint separation, while over-torquing can cause bolt failure or thread stripping.
Q4: Should I use this formula for critical applications?
A: For critical applications, consult engineering standards and consider factors like material properties, lubrication, and environmental conditions.
Q5: How does friction affect torque requirements?
A: Higher friction increases the torque coefficient, requiring more torque to achieve the same clamping force.