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Decimal places required for angles

Decimal places required for angles

Decimal places required for angles

(OP)
Using Y14.5 and decimal inch on drawing, how should an angle of say 25.000 (basic) degrees be expressed.  How many decimal places are required?

The Standard seems to be a little vague or again I am overlooking.

 

RE: Decimal places required for angles

2.3.3 Angle Tolerances. Where angle dimensions
are used, both the plus and minus values and
the angle have the same number of decimal places.
EXAMPLE:
25.0° ±.2° not 25° ±.2°

RE: Decimal places required for angles

(OP)
When used in conjunction with positional tolerance, does the positional tolerance have any influence on the number of decimal places?

Supposing 6 holes at 60 degrees, with a positional tol of .005 dia.  Is the angle required to have 3 trailing zeroes?  Again by the Standard?

RE: Decimal places required for angles

From a recent thread thread1103-222237: Sig Figs and Tolerance

Quote (KENAT):

2.4 Interpretation of Limits.
All limits are absolute.  Dimenisonal limits, regardless of the number of decimal places, are used as if they were continued with zeros

RE: Decimal places required for angles

While a positional tolerance does determine the number of decimal places in inch dimensioning, I have found no references to it affecting angular dimensions.  I have always used only as many decimal places as required to define the requirements, be it none or three.

When the people fear their government, there is tyranny; when the government fears the people, there is liberty. - Thomas Jefferson
 

RE: Decimal places required for angles

Take a look at 2.3.2 (d) on pg. 25

RE: Decimal places required for angles

As far as I know the number of trailing digits dictate the measuring equipment. For example: a dimension such as 10+/-0.1 need to be measured with a caliper having 0.01 accuracy. A dimension such as 10+/-0.10 has to be measured by a caliper or micrometer having 0.001 accuracy.

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