The application of tolerances to a restricted length of a feature

Figure 20.12 shows the method of applying a tolerance to only a particular part of a feature.

Figure 20.12 shows the method of applying a tolerance to only a particular part of a feature.

Fig. 20.12

The tolerance frame in Fig. 20.13 shows the method of applying another tolerance, similar in type but smaller in magnitude, on a shorter length. In this case, the whole flat surface must lie between parallel planes 0.2 apart, but over any length of 180 mm, in any direction, the surface must be within 0.05.

CJ

0.2

0.05/180

Tolerance ^Length value feature

Tolerance ^Length value applicable

Fig. 20.13

Figure 20.14 shows the method used to apply a tolerance over a given length; it allows the tolerance

Figure 20.14 shows the method used to apply a tolerance over a given length; it allows the tolerance

Remarks related to the tolerance for example '4 holes', '2 surfaces' or '6x' should be written above the frame.

to accumulate over a longer length. In this case, straight-ness tolerance of 0.02 is applicable over a length of 100 mm. If the total length of the feature was 800 mm, then the total permitted tolerance would accumulate to 0.16.

Was this article helpful?

0 0
Pencil Drawing Beginners Guide

Pencil Drawing Beginners Guide

Easy Step-By-Step Lessons How Would You Like To Teach Yourself Some Of The Powerful Basic Techniques Of Pencil Drawing With Our Step-by-Step Tutorial. Learn the ABC of Pencil Drawing From the Experts.

Get My Free Ebook


Post a comment