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Tolerancing

# Tolerancing - Chapter Tolerancing Topics Exercises...

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Copyright © 2008 by K. Plantenberg Restricted use only Chapter Tolerancing Topics Exercises

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Copyright © 2008 by K. Plantenberg Restricted use only Tolerancing: Topics Summary 1) Tolerancing and Interchangeability 2) Tolerancing Standards 3) Tolerance Types 1) General Definitions 2) Metric Tolerances 7) Selecting Tolerances 8) Tolerance Accumulation 9) Formatting Tolerances
Copyright © 2008 by K. Plantenberg Restricted use only Tolerancing: Exercises Exercise 8-1: General definitions Exercise 8-2: Inch tolerance definitions Exercise 8-3: Types of fit Exercise 8-4: Determining fit type Exercise 8-5: Limits and fits Exercise 8-6: Milling jack assembly tolerances Exercise 8-7: Millimeter tolerance definitions Exercise 8-8: Metric fit designation Exercise 8-9: Systems Exercise 8-10: Metric limits and fits

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Copyright © 2008 by K. Plantenberg Restricted use only Tolerancing: Exercises Exercise 8-11: Tolerance accumulation Exercise 8-12: Over dimensioning

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Copyright © 2008 by K. Plantenberg Restricted use only Summary What will we learn in Chapter – Tolerancing? We will learn about tolerancing and how important this technique is to mass production. Key points If a feature’s size is toleranced, it is allowed to vary within a range of values or limits. Tolerancing enables an engineer to design interchangeable or replacement parts.
Copyright © 2008 by K. Plantenberg Restricted use only Tolerancing 8.1) Tolerancing for Interchangeability

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Copyright © 2008 by K. Plantenberg Restricted use only Tolerancing / Interchangeability Tolerancing is dimensioning for interchangeability. What is interchangeability? An interchangeable part is simply a mass produced part (a replacement part).
Copyright © 2008 by K. Plantenberg Restricted use only Tolerancing / Interchangeability How is a feature on an interchangeable part dimensioned? The feature is not dimensioned using a single value, but a range of values. 1.00 1.005 .994

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Copyright © 2008 by K. Plantenberg Restricted use only Tolerancing / Interchangeability A tolerance is the amount of size variation permitted. You can choose a tolerance that specifies a large or small variation. 1.005 .994 Tolerance = 1.005 - .994 = .011 Size limits =
Copyright © 2008 by K. Plantenberg Restricted use only Tolerancing / Interchangeability Why do we want a part’s size to be controlled by two limits? It is necessary because it is impossible to manufacture parts without some variation. The stated limits are a form of quality control.

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Copyright © 2008 by K. Plantenberg Restricted use only Tolerancing / Interchangeability Choosing a tolerance for your design. Specify a tolerance with whatever degree of accuracy that is required for the design to work properly.
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Tolerancing - Chapter Tolerancing Topics Exercises...

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