1. What is Pump Shaft Torque Capacity?

The maximum torque capacity of a pump shaft is the highest torque that can be safely transmitted without causing failure. It depends on the shaft diameter and the material's shear stress capacity.

2. How Does the Calculator Work?

The calculator uses the torque capacity equation:

Where:

• \( \tau \) — Maximum torque capacity (Nm)
• \( d \) — Shaft diameter (m)
• \( \sigma \) — Material shear stress (Pa)
• \( \pi \) — Pi constant (~3.1416)

Explanation: The equation shows that torque capacity increases with the cube of the shaft diameter and linearly with the material's shear stress capacity.

3. Importance of Torque Calculation

Details: Proper torque capacity calculation ensures pump shafts can handle operational loads without failure, preventing equipment damage and downtime.

4. Using the Calculator

Tips: Enter shaft diameter in meters and material shear stress in Pascals. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is typical shear stress for common shaft materials?
A: Carbon steel ~200-300 MPa, stainless steel ~250-350 MPa, but always consult material specifications.

Q2: How does diameter affect torque capacity?
A: Torque capacity increases with the cube of diameter - doubling diameter increases capacity 8x.

Q3: Should safety factors be applied?
A: Yes, typical safety factors range from 1.5-3.0 depending on application criticality and load variability.

Q4: What about hollow shafts?
A: This calculator is for solid shafts. Hollow shafts require a different equation accounting for inner diameter.

Q5: How to measure shaft diameter accurately?
A: Use precision calipers or micrometers, measuring at multiple points along the shaft length.