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Dimensions & Tolerances – Mind Map - Coggle Diagram
Dimensions & Tolerances – Mind Map
Types of Dimensions
Linear (horizontal, vertical)
Angular (measured in degrees)
Diameter and radius
Ordinate (measured from a baseline)
Types of Tolerances
Unilateral: Variation in one direction
Bilateral: Variation in both directions
Limit: Maximum and minimum values shown
Purpose
Ensures parts fit and function properly
Allows for manufacturing imperfections
Communicates clear design intent
Definition
Dimension: A measurable size
Tolerance: Acceptable variation from a specified dimension.
Tolerance Standards
ISO
ANSI
GD&T
Geometric Tolerancing
Controls shape, orientation, and position
Uses symbols: flatness, parallelism, concentricity, etc.
Impacts of Tolerancing
Affects part cost and manufacturability
Tight tolerances = higher cost
Loose tolerances = easier production, but less precision
Best Practices
Don’t over-tolerance
Use standard tolerances where possible
Apply only where functionally necessary