1. What is a Tolerance Ratio Calculator?

Definition: This calculator computes the ratio between tolerance and nominal value, which is a dimensionless quantity used in engineering and manufacturing.

Purpose: It helps engineers and quality control professionals assess the relative tightness of tolerances in relation to nominal dimensions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( TR \) — Tolerance ratio (dimensionless)
• \( T \) — Tolerance (context-specific units, e.g., mm)
• \( N \) — Nominal value (same units as tolerance)

Explanation: The tolerance is divided by the nominal value to obtain a ratio that indicates the relative magnitude of the tolerance.

3. Importance of Tolerance Ratio

Details: Tolerance ratio helps in comparing the tightness of tolerances across different parts or features, regardless of their absolute size.

4. Using the Calculator

Tips: Enter the tolerance and nominal value in the same units. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What does the tolerance ratio indicate?
A: A lower ratio indicates tighter tolerances relative to the nominal size, while higher ratios indicate looser tolerances.

Q2: What units should I use?
A: Use consistent units for both tolerance and nominal value (e.g., both in mm or both in inches).

Q3: What's a typical tolerance ratio range?
A: This varies by industry, but common ratios range from 0.001 (very tight) to 0.01 (standard) to 0.1 (loose).

Q4: Can I use this for angular tolerances?
A: Yes, as long as both tolerance and nominal value are in the same angular units (degrees, radians, etc.).

Q5: How is this different from tolerance percentage?
A: Tolerance ratio is the absolute ratio, while percentage would be this ratio multiplied by 100.