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Torque to Tension Formula:
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The torque to tension formula calculates the axial force (tension) generated when torque is applied to a fastener. This is essential for proper bolt tightening and ensuring structural integrity in mechanical assemblies.
The calculator uses the torque to tension formula:
Where:
Explanation: The formula converts rotational torque into linear tension force, accounting for friction and mechanical advantage through the K factor.
Details: Accurate tension calculation is crucial for proper bolt preload, preventing joint failure, ensuring even load distribution, and maintaining structural integrity in mechanical systems.
Tips: Enter torque in Nm, K factor (typically 0.15-0.25 for lubricated bolts), and diameter in meters. All values must be positive and valid.
Q1: What is the typical range for K factor?
A: K factor typically ranges from 0.15 to 0.25 for lubricated bolts, and 0.20 to 0.30 for dry or plated bolts, depending on surface conditions.
Q2: Why is accurate tension important in bolted joints?
A: Proper tension ensures the joint remains tight under load, prevents loosening from vibration, and maintains the seal in pressurized applications.
Q3: How does lubrication affect the K factor?
A: Lubrication reduces friction, which lowers the K factor, meaning less torque is required to achieve the same tension compared to dry conditions.
Q4: Can this formula be used for metric and imperial units?
A: Yes, but units must be consistent. Convert all measurements to the same system (SI or imperial) before calculation.
Q5: What are common applications of torque to tension conversion?
A: Automotive assembly, aerospace fastening, construction, machinery manufacturing, and any application requiring precise bolt preload.