Chapter 9 Tolerancing

9-1 Introduction

Tolerances define the manufacturing limits for dimensions. All dimensions have tolerances either written directly on the drawing as part of the dimension or implied by a predefined set of standard tolerances that apply to any dimension that does not have a stated tolerance.

This chapter explains general tolerance conventions and how they are applied by using AutoCAD. It includes a sample tolerance study and an explanation of standard fits and surface finishes.

Chapter 10 explains geometric tolerances.

9-2 Direct Tolerance Methods

There are two methods used to include tolerances as part of a dimension: plus and minus, and limits. Plus and minus tolerances can be expressed in either bilateral or unilateral ...

Get Engineering Graphics with AutoCAD 2020 now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.