×
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

Parallelism question

Parallelism question

Parallelism question

(OP)
Hi everyone
I have a tolerance that states "// 0.025/ 100 in to datum A"  in milimeters

I'm interpreting that means parallelism within 0.025 mm over a 100 mm diameter area relative to datum A.
Is it correct?

Tanks  

RE: Parallelism question

Almost correct, except that I'm not sure about the "diameter" thing. To say that, there would be a diameter symbol Ø before the 100; without it we would just assume linear length of 100 (although that too can be confusing because I would usually show another dimension, such as 100 X 12).
I also wonder what the "in" means after the 100 -- did you mean mm?  It would be strange to mix a millimeter tolerance with an inch dimension on the local segment.

John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems

RE: Parallelism question

(OP)
Well, i was trying to put in words what appears in the drawing, the "in", i meant it to relate the values to the datum A, the "in" doesn't appear in the drawing. Is only milimeters the tolerance.

Trying another time:

"   //0.025/ 100   "  

it's what appears before the reference to datum A. The diameter was an interpretation i made but my initial tought about it was a linear section of 100 mm, but then only appears as i wrote above without anything after the "100".

Tanks for you attention
 

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