Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations JAE on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. RoboBill

    specifying "flatness" of rod or tubing bent into a U-shape

    Thanks very much for the input. Since I'm really new to this I'm not sure exactly how this is indicated on a drawing. Are you saying that the envelope principle means that I don't have to call out some range of acceptable flatness as long as the part "appears" to be flat as drawn? Since...
  2. RoboBill

    specifying "flatness" of rod or tubing bent into a U-shape

    Mike, thanks much for the reply. Unfortunately (maybe) my company's standard is that ALL drawings have GD&T applied, so it's not a question of whether it gains me anything. I was just trying to find the easiest/best way to specify that the two bends are in the same plane. Thanks again. Bill
  3. RoboBill

    specifying "flatness" of rod or tubing bent into a U-shape

    Hi all, I'm scratching my head over how to specify something that seems like it should be simple to do. We've got some 1/2' Dia. rods that are bent into U-shaped pieces where the "horizontal" section of the U is appreciably longer than the vertical legs.The two ends of the U should be...
  4. RoboBill

    flatness tolerances for "stock" material

    That's just it, Belanger, I DON'T want to apply a flatness tolerance. I think it's contradictory to specify that something is both "Stock" thickness and to apply a flatness tolerance to it. It's that it seems to be standard practice at my company that makes me ask the question. As I said in...
  5. RoboBill

    flatness tolerances for "stock" material

    Well I guess my question really comes down to just what am I telling a machinist/fabricator when I apply a flatness tolerance (or straightness or perpendicularity tolerance, for that matter) to a surface that is also dimensioned as being "stock"? It seems like I should have one or the other but...
  6. RoboBill

    flatness tolerances for "stock" material

    Thanks for the redirect, MintJulep. This thread seems mostly concerned with tolerancing the dimension specifically rather than flatness. After further search I'm wondering if using the flatness tolerance with the free state modifier might be appropriate (at least for the larger 1/4" to 1/2"...
  7. RoboBill

    flatness tolerances for "stock" material

    Several people at my company always put flatness tolerance callouts on faces that are indicated as being "stock" dimensional thickness and then use them as a datum, typically Datum A. We're not talking sheet metal here either, we're talking stock anywhere from 1/4" plate to 1" bar stock. I...

Part and Inventory Search

Back
Top