×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

How Many Decimal Places?

How Many Decimal Places?

How Many Decimal Places?

(OP)
OK, I know if my dimension is 1.0005 my tolerances have to be to 4 places (+/- .0005).  My question comes in when the 1.0005 is defined as Datum A.  When a second surfce is controlled perpendicular to A within 5 thousandths...does it get expressed as .005 or .0050?
Thanks,
Anthony

RE: How Many Decimal Places?

I think the FCF for the perpendicularity would be .005 not .0050.  Although I think I see the point of the question.

KENAT, probably the least qualified checker you'll ever meet...

RE: How Many Decimal Places?

Each surface tolerance will stand alone based on its' function, thus if the perpendicular surface surface needs only .005 accuracy, an extra zero would be meaningless.

RE: How Many Decimal Places?

I agree with the KENAT & CheckerRon.

Chris
SolidWorks/PDMWorks 08 2.0
AutoCAD 06
ctopher's home (updated 10-07-07)
ctopher's blog

RE: How Many Decimal Places?

Values in tolerance frames are absolute.  Additional precision is meaningless.

RE: How Many Decimal Places?

As the question is asked, I agree with the others.
To clarify what TheTick posts, the number of decimal places in a FCF would be the same as that of any related dimension locating that feature (para 2.3.2(d) of the standard).  Not quite the situation about which you are asking.

Believe it if you need it or leave it if you dare. - Robert Hunter

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources