Torque resisted by one bolt given shear stress in bolt Calculator

Torque Formula:

\[ T_{bolt} = \frac{f_s \times \pi \times d_{bolt}^2 \times d_{pitch}}{8} \]

Shear Stress in Bolt:

Diameter of Bolt:

Diameter of bolt pitch circle:

Tolerance:

Torque resisted by bolt (N·m):

Tolerance Range (±5%):

Definition: Torque resisted by bolt is described as the turning effect of force on the axis of rotation. In brief, it is a moment of force.

Purpose: This calculation helps engineers determine the torque capacity of individual bolts in mechanical assemblies.

The calculator uses the formula:

\[ T_{bolt} = \frac{f_s \times \pi \times d_{bolt}^2 \times d_{pitch}}{8} \]

Where:

Explanation: The formula calculates the torque capacity based on the bolt's shear strength and geometry.

Details: Proper torque calculation ensures bolt integrity, prevents over-tightening, and maintains joint reliability.

Tips: Enter shear stress, bolt diameter, pitch circle diameter, and tolerance percentage (default ±5%).

Q1: What is typical shear stress for bolts?
A: Varies by material; common steel bolts range from 140-420 MPa (140,000,000-420,000,000 Pa).

Q2: Why include tolerance?
A: Tolerance accounts for material variations, manufacturing tolerances, and safety factors.

Q3: How does pitch diameter affect torque?
A: Larger pitch diameter increases torque capacity as it provides greater leverage.

Q4: Can I use this for metric and imperial units?
A: Yes, but ensure all units are consistent (all metric or all imperial).

Q5: What safety factor should I use?
A: Typical safety factors range from 1.5 to 3.0 depending on application criticality.