The GPS Pocket Book
Second Edition · Per Bennich & Henrik S. Nielsen
A 48-page pocket reference containing the most important and most fundamental information about GPS tolerance symbols and how they are used to express tolerancing clearly and unequivocally on an engineering drawing. Available in English, Chinese, German, and Swedish.
About the Book
The GPS Pocket Book is designed to be the daily reference for GPS practitioners. It helps you recall all the concepts and basic principles involved in GPS — the symbols, the rules, and the grammar of the GPS symbol language.
It can be difficult to remember the meaning of all the GPS symbols:
- Which ones require reference to a datum?
- Is the value in the tolerance frame the full width of the tolerance zone, or is it ±?
- What does the framed dimension mean?
It is all there in the GPS Pocket Book.
The GPS Pocket Book is not intended to be a substitute for the GPS standards. Nor does it eliminate the need for GPS training. It is intended as a memory aid for everybody who comes into contact with GPS drawings:
- Designers
- Detailers
- CAD Operators
- Manufacturing Engineers
- Quality Engineers
- CMM Operators
- Inspectors
- Metrologists
The translations are all done by ISO TC 213 participants, ensuring that the correct standard terminology is used in every language edition and avoiding misunderstandings. You can meet the translators on the About page.
Each language edition is laid out so that every figure appears on the same page in all versions. This makes cross-language communication straightforward: a buyer in Germany using the German edition can discuss “the figure at the top of page 15” with a supplier in China using the Chinese edition — they are looking at exactly the same figure.
Language Editions
Sample Pages
See how the same content looks across all language editions:
From the Foreword
The GPS Pocket Book gives a brief presentation of the most important and the most frequently used tolerance symbols in GPS tolerancing.
The GPS Pocket Book also presents the most common rules and the most basic grammar related to the GPS symbol language. The GPS Pocket Book is not intended for stand alone use. It does not give a complete and exhaustive presentation of GPS. The purpose of the GPS Pocket Book is to be a memory aid for people who are using GPS in their daily work.
The GPS Pocket Book is intended for use together with the numerous GPS standards issued by ISO.
Only very few of the more than one hundred GPS standards are referenced and mentioned in the text. The fact that a standard is mentioned does not mean that it is the most important, only that it is the most obvious place to look for that particular issue.
Standards not yet issued by ISO on the original issue date of the pocket book (2014) are marked with the symbol ¤ before the designation.
Contents
- Fundamental and Global GPS Rules
- Tolerancing by Dimensions
- Datums and Datum Systems
- Theoretically Exact Dimensions
- Geometrical Tolerancing:
- Straightness
- Flatness
- Roundness
- Cylindricity
- Form of a Line
- Form of a Surface
- Perpendicularity
- Angularity
- Parallelism
- Position
- Concentricity/Coaxiality
- Symmetry
- Circular Runout
- Total Runout
- Maximum Material Requirement
- Tolerancing of Non-rigid Work Pieces
- Projected Tolerance Zone
- Tolerancing of Surface Texture
- Tolerancing of Surface Imperfections
- Tolerancing of Edges
- General Tolerances