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Metric Thread Torque Formula:
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The metric thread torque formula calculates the torque required for threaded fasteners based on the torque coefficient, applied force, and thread diameter. It is essential for proper fastener installation in mechanical and engineering applications.
The calculator uses the metric thread torque formula:
Where:
Explanation: The formula calculates the rotational force needed to achieve proper tension in threaded fasteners, accounting for friction and mechanical advantage.
Details: Accurate torque calculation is crucial for ensuring proper fastener tension, preventing joint failure, avoiding damage to threads, and maintaining structural integrity in mechanical assemblies.
Tips: Enter the torque coefficient (typically between 0.15-0.25 for lubricated threads), force in Newtons, and diameter in meters. All values must be positive numbers.
Q1: What is a typical torque coefficient value?
A: For lubricated steel threads, K is typically 0.15-0.25. Dry threads may have values up to 0.35 or higher depending on surface conditions.
Q2: Why is proper torque important?
A: Proper torque ensures adequate clamping force without damaging threads or the fastened components, preventing loosening or failure under load.
Q3: How does lubrication affect torque?
A: Lubrication reduces friction, allowing more of the applied torque to convert to clamping force rather than overcoming friction.
Q4: Can this formula be used for all thread types?
A: While primarily for metric threads, the formula can be adapted for other thread types with appropriate coefficient adjustments.
Q5: What factors affect the torque coefficient?
A: Surface finish, lubrication, thread geometry, material hardness, and plating/coatings all influence the torque coefficient value.