PPT-Dimensioning Standards

2012 Project Lead The Way Inc Introduction to Engineering Design Dimensioning Standards In order for the drawings to be dimensioned so that all people can understand them we need to follow standards that every company in the world must follow Standards are created by these organizations. Two general types of dimensions are used in drawings size di mensions such as the size of holes and size of features such as widths and thickness and location dimensions such as the location of holes The purpose of a drawing is to convey to the work Datum and Tolerance Accumulation . Possible Tolerance Conditions . Block Example . Specific Tolerances for Slip and Press Fits. Machine Tolerances . Tolerance Block . This presentation includes the following concepts . Fiducialisation and shims dimensioning. Sylvain GRIFFET, . 24/01/2011. Measurements performed on the . 3. rd. week of January 2011. 1. /5. Measurement objectives. Unfortunately . neither the . girders or cradles (but to a lesser extent) . Unit 2 – Limits of Size. Overview of Rules. There are four general rules. Taylor’s rule. Limits of size. . Regardless of Feature Size (RFS) is the default.. Pitch cylinder axis is reference for thread and screws.. Chapter 7, Virtual Condition. Introduction. Chapter introduces an important concept related to the mating of parts in an assembly.. Interchangeability of parts and assemblies can only be ensured when parts are accepted at virtual condition or better.. Unit 1 – Introduction, Symbols, and Terms. 2. Everyone should have a workbook to follow along. . It contains necessary reference information along with class exercises.. Page numbers in yellow on the slides match pages in the workbook.. Temperature control allows for approximately 0.1nm/ © 2012 Project Lead The Way, Inc.. Introduction to Engineering Design. Dimensions should reflect actual size of the object, not the scaled size.. The dimension measured on the drawing is ¾ in., but the actual dimension of the part is 2 in. Therefore, show 2.00 on drawing.. 1. Dimensions should NOT be duplicated, nor should the same information be given in two different ways.. Incorrect. 1. Dimensions should NOT be duplicated, nor should the same information be given in two different ways.. Drafting and Dimensioning Standards. Instructors Name. Course Number. Planchard Copyright 2012. Drafting Standards . In order for drawings to be dimensioned so people can understand them, we need to follow various drafting dimensioning standards. Below are a few:. Size. and. Location . of all features. Engineers, designers, and engineering technologists need to know. Dimension Completely. Width. Dimension Completely. Height. Width. Dimension Completely. Depth. Making things fit. General rules of dimensioning (1). Dimensions . should NOT be duplicated, or the same information be given in two different . ways.. No . unnecessary dimensions should be used - only those needed to produce or inspect the . Product Definition . and Related Documentation Practices. By . Fredric . Constantino. In 1957 the first . edition of Y14.5 American Drafting Standards . Manual, Section . 5, Dimensioning and Notes, was . STANDARDS OF PRACTICE NATIONAL ASSOCIATION OFHOME INSPECTORS, INC. TABLE OF CONTENTS1. Purpose, Scope & General Statements . . . . . . . . . . . . . . . . . . .22. General Limitations & Exclusions . .