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. 1 All dimension extension and leader lines shou ld be thin sharp dark lines 5mm2H 2 Extension lines indicate the points between which the dimension figures apply They are drawn perpendicular to the dimension lines start with a visibl e gap 132 betw EXAMPLE MINIMUM HOLE SIZE AND MAXIMUM SHAFT SIZE LMC LEAST MATERIAL CONDITION THAT CONDITION WHERE A FEATURE OF SIZE CONTAINS THE LEAST AMOUNT OF MATERIAL WITHIN THE STATED LIMITS OF SIZE EXAMPLE MAXIMUM HOLE SIZE AND MINIMUM SHAFT SIZE RFS REGAR 4 WHQVLRQ57347OLQHV57347DQG57347GLPHQVLRQ57347OLQHV 573607KH UVW57347GLPHQVLRQ57347OLQH57347LV57347VSDFHG57347D57347PLQLPXP57347RI573475736657362573715752457347RU57347573645736357347PP57347IURP57347WKH57347YLHZ57347DQG573475736457362573675752457347R Dimensions. What is dimensioning?. Communicating shape and size in a clear fashion. #1 Rule for Dimensioning: Provide the dimensions which most clearly and accurately show the size and location of a feature. . 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.. 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.. Dimensioning. The important information on a drawing is the dimension and tolerance of all of its features.. Lines used in dimensioning. Dimension line:. A dimension line is a thin, dark line terminated by arrowheads and indicates the extent of the dimension (figure a).. 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:. 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 . 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.. 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 . Will Durfee & Tim . Kowalewski. Department of Mechanical Engineering. University of Minnesota. Opening comments. Engineering graphics is the method for documenting a . design. Mechanical engineering students must be familiar with standards of engineering graphics as it is expected in industry. 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..